/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_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 20:15:13,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 20:15:13,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 20:15:13,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 20:15:13,610 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 20:15:13,618 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 20:15:13,619 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 20:15:13,622 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 20:15:13,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 20:15:13,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 20:15:13,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 20:15:13,630 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 20:15:13,631 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 20:15:13,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 20:15:13,637 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 20:15:13,638 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 20:15:13,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 20:15:13,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 20:15:13,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 20:15:13,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 20:15:13,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 20:15:13,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 20:15:13,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 20:15:13,653 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 20:15:13,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 20:15:13,665 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 20:15:13,665 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 20:15:13,667 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 20:15:13,667 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 20:15:13,670 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 20:15:13,671 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 20:15:13,671 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 20:15:13,672 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 20:15:13,672 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 20:15:13,680 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 20:15:13,680 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 20:15:13,680 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 20:15:13,681 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 20:15:13,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 20:15:13,683 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 20:15:13,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 20:15:13,684 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 20:15:13,720 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 20:15:13,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 20:15:13,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 20:15:13,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 20:15:13,722 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 20:15:13,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 20:15:13,723 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 20:15:13,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 20:15:13,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 20:15:13,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 20:15:13,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 20:15:13,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 20:15:13,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 20:15:13,725 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 20:15:13,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 20:15:13,725 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 20:15:13,725 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 20:15:13,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 20:15:13,726 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 20:15:13,726 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 20:15:13,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 20:15:13,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 20:15:13,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 20:15:13,727 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 20:15:13,727 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 20:15:13,727 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 20:15:13,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 20:15:13,728 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 20:15:13,728 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 20:15:13,728 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 20:15:14,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 20:15:14,027 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 20:15:14,032 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 20:15:14,034 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 20:15:14,034 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 20:15:14,035 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-12 20:15:14,096 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be12ed177/18a971cb839e4f3da07e60cd72e16ba7/FLAGc115e459e [2020-10-12 20:15:14,520 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 20:15:14,521 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-12 20:15:14,537 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be12ed177/18a971cb839e4f3da07e60cd72e16ba7/FLAGc115e459e [2020-10-12 20:15:14,873 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/be12ed177/18a971cb839e4f3da07e60cd72e16ba7 [2020-10-12 20:15:14,881 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 20:15:14,883 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 20:15:14,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 20:15:14,884 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 20:15:14,888 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 20:15:14,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:15:14" (1/1) ... [2020-10-12 20:15:14,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7100e673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:15:14, skipping insertion in model container [2020-10-12 20:15:14,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:15:14" (1/1) ... [2020-10-12 20:15:14,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 20:15:14,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 20:15:15,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:15:15,300 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 20:15:15,466 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:15:15,490 INFO L208 MainTranslator]: Completed translation [2020-10-12 20:15:15,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:15:15 WrapperNode [2020-10-12 20:15:15,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 20:15:15,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 20:15:15,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 20:15:15,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 20:15:15,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:15:15" (1/1) ... [2020-10-12 20:15:15,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:15:15" (1/1) ... [2020-10-12 20:15:15,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:15:15" (1/1) ... [2020-10-12 20:15:15,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:15:15" (1/1) ... [2020-10-12 20:15:15,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:15:15" (1/1) ... [2020-10-12 20:15:15,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:15:15" (1/1) ... [2020-10-12 20:15:15,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:15:15" (1/1) ... [2020-10-12 20:15:15,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 20:15:15,556 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 20:15:15,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 20:15:15,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 20:15:15,558 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:15:15" (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 20:15:15,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 20:15:15,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 20:15:15,637 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 20:15:15,638 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 20:15:15,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 20:15:15,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 20:15:15,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 20:15:15,639 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 20:15:15,640 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 20:15:15,640 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 20:15:15,640 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 20:15:15,640 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 20:15:15,640 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 20:15:15,641 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 20:15:15,641 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 20:15:15,642 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 20:15:15,642 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 20:15:15,642 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 20:15:15,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 20:15:15,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 20:15:16,392 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 20:15:16,392 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 20:15:16,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:15:16 BoogieIcfgContainer [2020-10-12 20:15:16,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 20:15:16,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 20:15:16,405 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 20:15:16,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 20:15:16,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 08:15:14" (1/3) ... [2020-10-12 20:15:16,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ec76bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:15:16, skipping insertion in model container [2020-10-12 20:15:16,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:15:15" (2/3) ... [2020-10-12 20:15:16,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15ec76bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:15:16, skipping insertion in model container [2020-10-12 20:15:16,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:15:16" (3/3) ... [2020-10-12 20:15:16,416 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-12 20:15:16,427 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 20:15:16,440 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 20:15:16,454 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 20:15:16,485 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 20:15:16,485 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 20:15:16,485 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 20:15:16,485 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 20:15:16,486 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 20:15:16,486 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 20:15:16,486 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 20:15:16,486 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 20:15:16,508 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states. [2020-10-12 20:15:16,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 20:15:16,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:15:16,521 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 20:15:16,521 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:15:16,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:15:16,528 INFO L82 PathProgramCache]: Analyzing trace with hash 653816526, now seen corresponding path program 1 times [2020-10-12 20:15:16,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:15:16,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940001382] [2020-10-12 20:15:16,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:15:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:17,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:17,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:17,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:17,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:19,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:19,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 20:15:19,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:15:19,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2308 [2020-10-12 20:15:19,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:19,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:15:19,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:15:19,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 20:15:19,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 20:15:19,760 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:15:19,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:15:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:19,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:19,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:19,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:15:19,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:15:19,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:15:19,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:19,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:15:19,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:15:19,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:15:19,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:19,817 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 20:15:19,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940001382] [2020-10-12 20:15:19,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:15:19,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:15:19,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985952723] [2020-10-12 20:15:19,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:15:19,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:15:19,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:15:19,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:15:19,850 INFO L87 Difference]: Start difference. First operand 154 states. Second operand 6 states. [2020-10-12 20:15:20,174 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-12 20:15:21,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:15:21,188 INFO L93 Difference]: Finished difference Result 712 states and 1188 transitions. [2020-10-12 20:15:21,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:15:21,190 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-12 20:15:21,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:15:21,211 INFO L225 Difference]: With dead ends: 712 [2020-10-12 20:15:21,211 INFO L226 Difference]: Without dead ends: 595 [2020-10-12 20:15:21,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:15:21,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2020-10-12 20:15:21,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 237. [2020-10-12 20:15:21,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-12 20:15:21,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 374 transitions. [2020-10-12 20:15:21,294 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 374 transitions. Word has length 66 [2020-10-12 20:15:21,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:15:21,295 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 374 transitions. [2020-10-12 20:15:21,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:15:21,295 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 374 transitions. [2020-10-12 20:15:21,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 20:15:21,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:15:21,301 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 20:15:21,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 20:15:21,301 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:15:21,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:15:21,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1268134624, now seen corresponding path program 1 times [2020-10-12 20:15:21,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:15:21,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930658587] [2020-10-12 20:15:21,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:15:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:21,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:21,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:21,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:21,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:22,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:24,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:24,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 20:15:24,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:15:24,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2740 [2020-10-12 20:15:24,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:24,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:15:24,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 20:15:24,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 20:15:24,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:15:24,486 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:15:24,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:15:24,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:24,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:24,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:24,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:15:24,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:15:24,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 20:15:24,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:24,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:15:24,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:15:24,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:15:24,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-12 20:15:24,541 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 20:15:24,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930658587] [2020-10-12 20:15:24,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:15:24,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:15:24,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166301741] [2020-10-12 20:15:24,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:15:24,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:15:24,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:15:24,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:15:24,546 INFO L87 Difference]: Start difference. First operand 237 states and 374 transitions. Second operand 7 states. [2020-10-12 20:15:24,812 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-12 20:15:26,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:15:26,055 INFO L93 Difference]: Finished difference Result 1483 states and 2442 transitions. [2020-10-12 20:15:26,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:15:26,055 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-12 20:15:26,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:15:26,064 INFO L225 Difference]: With dead ends: 1483 [2020-10-12 20:15:26,064 INFO L226 Difference]: Without dead ends: 1307 [2020-10-12 20:15:26,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:15:26,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2020-10-12 20:15:26,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 694. [2020-10-12 20:15:26,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 694 states. [2020-10-12 20:15:26,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1133 transitions. [2020-10-12 20:15:26,140 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1133 transitions. Word has length 67 [2020-10-12 20:15:26,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:15:26,141 INFO L479 AbstractCegarLoop]: Abstraction has 694 states and 1133 transitions. [2020-10-12 20:15:26,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:15:26,141 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1133 transitions. [2020-10-12 20:15:26,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 20:15:26,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:15:26,144 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 20:15:26,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 20:15:26,145 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:15:26,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:15:26,145 INFO L82 PathProgramCache]: Analyzing trace with hash -714520107, now seen corresponding path program 1 times [2020-10-12 20:15:26,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:15:26,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389283933] [2020-10-12 20:15:26,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:15:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:26,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:26,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:26,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:26,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:26,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:28,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:28,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 20:15:28,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:15:28,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2199 [2020-10-12 20:15:28,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:28,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:15:28,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:15:28,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 20:15:28,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:28,609 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:15:28,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:15:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:28,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:28,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:28,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:15:28,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:15:28,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:15:28,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:28,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:15:28,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:15:28,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:15:28,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:15:28,645 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 20:15:28,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389283933] [2020-10-12 20:15:28,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:15:28,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:15:28,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715810968] [2020-10-12 20:15:28,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:15:28,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:15:28,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:15:28,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:15:28,650 INFO L87 Difference]: Start difference. First operand 694 states and 1133 transitions. Second operand 7 states. [2020-10-12 20:15:28,998 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-12 20:15:30,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:15:30,644 INFO L93 Difference]: Finished difference Result 4276 states and 7063 transitions. [2020-10-12 20:15:30,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:15:30,645 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-12 20:15:30,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:15:30,675 INFO L225 Difference]: With dead ends: 4276 [2020-10-12 20:15:30,675 INFO L226 Difference]: Without dead ends: 3699 [2020-10-12 20:15:30,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:15:30,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3699 states. [2020-10-12 20:15:30,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3699 to 1998. [2020-10-12 20:15:30,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1998 states. [2020-10-12 20:15:30,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1998 states to 1998 states and 3285 transitions. [2020-10-12 20:15:30,977 INFO L78 Accepts]: Start accepts. Automaton has 1998 states and 3285 transitions. Word has length 68 [2020-10-12 20:15:30,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:15:30,978 INFO L479 AbstractCegarLoop]: Abstraction has 1998 states and 3285 transitions. [2020-10-12 20:15:30,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:15:30,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1998 states and 3285 transitions. [2020-10-12 20:15:30,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 20:15:30,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:15:30,987 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 20:15:30,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 20:15:30,988 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:15:30,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:15:30,989 INFO L82 PathProgramCache]: Analyzing trace with hash -727781241, now seen corresponding path program 1 times [2020-10-12 20:15:30,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:15:30,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866263994] [2020-10-12 20:15:30,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:15:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:31,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:31,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:31,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:31,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:31,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:33,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:33,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 20:15:33,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:15:33,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2076 [2020-10-12 20:15:33,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:33,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:15:33,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:15:33,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 20:15:33,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:33,415 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:15:33,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:15:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:33,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:33,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:33,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:15:33,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:15:33,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:15:33,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:33,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:15:33,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:15:33,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:15:33,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:33,449 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 20:15:33,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866263994] [2020-10-12 20:15:33,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:15:33,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:15:33,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850082903] [2020-10-12 20:15:33,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:15:33,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:15:33,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:15:33,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:15:33,452 INFO L87 Difference]: Start difference. First operand 1998 states and 3285 transitions. Second operand 7 states. [2020-10-12 20:15:33,684 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-12 20:15:35,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:15:35,366 INFO L93 Difference]: Finished difference Result 12171 states and 20062 transitions. [2020-10-12 20:15:35,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:15:35,367 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-12 20:15:35,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:15:35,426 INFO L225 Difference]: With dead ends: 12171 [2020-10-12 20:15:35,426 INFO L226 Difference]: Without dead ends: 10334 [2020-10-12 20:15:35,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:15:35,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10334 states. [2020-10-12 20:15:35,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10334 to 5593. [2020-10-12 20:15:35,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5593 states. [2020-10-12 20:15:35,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5593 states to 5593 states and 9191 transitions. [2020-10-12 20:15:35,976 INFO L78 Accepts]: Start accepts. Automaton has 5593 states and 9191 transitions. Word has length 69 [2020-10-12 20:15:35,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:15:35,977 INFO L479 AbstractCegarLoop]: Abstraction has 5593 states and 9191 transitions. [2020-10-12 20:15:35,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:15:35,977 INFO L276 IsEmpty]: Start isEmpty. Operand 5593 states and 9191 transitions. [2020-10-12 20:15:35,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 20:15:35,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:15:35,979 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 20:15:35,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 20:15:35,979 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:15:35,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:15:35,980 INFO L82 PathProgramCache]: Analyzing trace with hash 2053684873, now seen corresponding path program 1 times [2020-10-12 20:15:35,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:15:35,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762672058] [2020-10-12 20:15:35,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:15:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:36,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:36,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:36,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:36,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:37,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:37,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:41,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:41,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 20:15:41,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 20:15:41,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 20:15:41,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:41,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:15:41,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 20:15:41,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 20:15:41,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 20:15:41,243 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:15:41,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:15:41,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:41,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:41,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:41,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:15:41,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:15:41,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 20:15:41,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:41,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:15:41,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:15:41,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:15:41,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:41,300 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 20:15:41,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762672058] [2020-10-12 20:15:41,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:15:41,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:15:41,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806690077] [2020-10-12 20:15:41,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:15:41,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:15:41,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:15:41,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:15:41,304 INFO L87 Difference]: Start difference. First operand 5593 states and 9191 transitions. Second operand 6 states. [2020-10-12 20:15:41,644 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-12 20:15:43,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:15:43,424 INFO L93 Difference]: Finished difference Result 22019 states and 36222 transitions. [2020-10-12 20:15:43,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:15:43,425 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-12 20:15:43,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:15:43,501 INFO L225 Difference]: With dead ends: 22019 [2020-10-12 20:15:43,501 INFO L226 Difference]: Without dead ends: 16588 [2020-10-12 20:15:43,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:15:43,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16588 states. [2020-10-12 20:15:44,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16588 to 10757. [2020-10-12 20:15:44,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10757 states. [2020-10-12 20:15:44,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10757 states to 10757 states and 17648 transitions. [2020-10-12 20:15:44,245 INFO L78 Accepts]: Start accepts. Automaton has 10757 states and 17648 transitions. Word has length 70 [2020-10-12 20:15:44,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:15:44,246 INFO L479 AbstractCegarLoop]: Abstraction has 10757 states and 17648 transitions. [2020-10-12 20:15:44,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:15:44,246 INFO L276 IsEmpty]: Start isEmpty. Operand 10757 states and 17648 transitions. [2020-10-12 20:15:44,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 20:15:44,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:15:44,248 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 20:15:44,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 20:15:44,248 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:15:44,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:15:44,249 INFO L82 PathProgramCache]: Analyzing trace with hash -990936345, now seen corresponding path program 1 times [2020-10-12 20:15:44,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:15:44,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856368110] [2020-10-12 20:15:44,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:15:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:44,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:44,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:44,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:44,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:44,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:45,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:45,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:49,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:49,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 20:15:49,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:15:49,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 20:15:49,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:49,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:15:49,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:15:49,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 20:15:49,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:15:49,697 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:15:49,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:15:49,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:49,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:49,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:49,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:15:49,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:15:49,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 20:15:49,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:49,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:15:49,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:15:49,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:15:49,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:15:49,744 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 20:15:49,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856368110] [2020-10-12 20:15:49,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:15:49,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:15:49,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375035836] [2020-10-12 20:15:49,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:15:49,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:15:49,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:15:49,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:15:49,748 INFO L87 Difference]: Start difference. First operand 10757 states and 17648 transitions. Second operand 6 states. [2020-10-12 20:15:50,059 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-12 20:15:52,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:15:52,100 INFO L93 Difference]: Finished difference Result 29469 states and 48327 transitions. [2020-10-12 20:15:52,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:15:52,100 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-12 20:15:52,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:15:52,160 INFO L225 Difference]: With dead ends: 29469 [2020-10-12 20:15:52,160 INFO L226 Difference]: Without dead ends: 23298 [2020-10-12 20:15:52,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:15:52,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23298 states. [2020-10-12 20:15:53,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23298 to 17233. [2020-10-12 20:15:53,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17233 states. [2020-10-12 20:15:53,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17233 states to 17233 states and 28271 transitions. [2020-10-12 20:15:53,208 INFO L78 Accepts]: Start accepts. Automaton has 17233 states and 28271 transitions. Word has length 70 [2020-10-12 20:15:53,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:15:53,209 INFO L479 AbstractCegarLoop]: Abstraction has 17233 states and 28271 transitions. [2020-10-12 20:15:53,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:15:53,209 INFO L276 IsEmpty]: Start isEmpty. Operand 17233 states and 28271 transitions. [2020-10-12 20:15:53,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 20:15:53,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:15:53,211 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 20:15:53,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 20:15:53,212 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:15:53,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:15:53,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1998371771, now seen corresponding path program 1 times [2020-10-12 20:15:53,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:15:53,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335576819] [2020-10-12 20:15:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:15:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:53,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:53,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:53,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:53,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:53,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:53,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:55,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:58,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:58,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 20:15:58,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:15:58,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 20:15:58,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:58,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:15:58,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:15:58,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 20:15:58,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:58,472 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:15:58,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:15:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:58,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:58,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:58,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:15:58,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:15:58,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 20:15:58,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:58,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:15:58,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:15:58,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:15:58,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:15:58,514 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 20:15:58,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335576819] [2020-10-12 20:15:58,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:15:58,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:15:58,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625933422] [2020-10-12 20:15:58,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:15:58,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:15:58,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:15:58,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:15:58,516 INFO L87 Difference]: Start difference. First operand 17233 states and 28271 transitions. Second operand 6 states. [2020-10-12 20:15:58,763 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-12 20:16:00,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:16:00,483 INFO L93 Difference]: Finished difference Result 33695 states and 55260 transitions. [2020-10-12 20:16:00,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:16:00,484 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-12 20:16:00,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:16:00,539 INFO L225 Difference]: With dead ends: 33695 [2020-10-12 20:16:00,539 INFO L226 Difference]: Without dead ends: 27524 [2020-10-12 20:16:00,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:16:00,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27524 states. [2020-10-12 20:16:01,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27524 to 21525. [2020-10-12 20:16:01,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21525 states. [2020-10-12 20:16:01,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21525 states to 21525 states and 35313 transitions. [2020-10-12 20:16:01,963 INFO L78 Accepts]: Start accepts. Automaton has 21525 states and 35313 transitions. Word has length 70 [2020-10-12 20:16:01,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:16:01,963 INFO L479 AbstractCegarLoop]: Abstraction has 21525 states and 35313 transitions. [2020-10-12 20:16:01,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:16:01,964 INFO L276 IsEmpty]: Start isEmpty. Operand 21525 states and 35313 transitions. [2020-10-12 20:16:01,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 20:16:01,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:16:01,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:16:01,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 20:16:01,966 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:16:01,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:16:01,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1536201620, now seen corresponding path program 1 times [2020-10-12 20:16:01,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:16:01,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678846778] [2020-10-12 20:16:01,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:16:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:02,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:02,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:02,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:02,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:03,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:03,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:04,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:06,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:06,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 20:16:06,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:16:06,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 20:16:06,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:06,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:16:06,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:16:06,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 20:16:06,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:07,278 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:16:07,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:16:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:07,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:07,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:07,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:16:07,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:16:07,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:16:07,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:07,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:16:07,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:16:07,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:16:07,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:07,319 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 20:16:07,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678846778] [2020-10-12 20:16:07,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:16:07,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:16:07,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120401249] [2020-10-12 20:16:07,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:16:07,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:16:07,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:16:07,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:16:07,327 INFO L87 Difference]: Start difference. First operand 21525 states and 35313 transitions. Second operand 5 states. [2020-10-12 20:16:10,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:16:10,254 INFO L93 Difference]: Finished difference Result 62899 states and 103153 transitions. [2020-10-12 20:16:10,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:16:10,255 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-12 20:16:10,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:16:10,347 INFO L225 Difference]: With dead ends: 62899 [2020-10-12 20:16:10,348 INFO L226 Difference]: Without dead ends: 41399 [2020-10-12 20:16:10,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:16:10,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41399 states. [2020-10-12 20:16:13,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41399 to 41397. [2020-10-12 20:16:13,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41397 states. [2020-10-12 20:16:13,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41397 states to 41397 states and 67341 transitions. [2020-10-12 20:16:13,084 INFO L78 Accepts]: Start accepts. Automaton has 41397 states and 67341 transitions. Word has length 71 [2020-10-12 20:16:13,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:16:13,084 INFO L479 AbstractCegarLoop]: Abstraction has 41397 states and 67341 transitions. [2020-10-12 20:16:13,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:16:13,084 INFO L276 IsEmpty]: Start isEmpty. Operand 41397 states and 67341 transitions. [2020-10-12 20:16:13,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 20:16:13,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:16:13,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:16:13,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 20:16:13,087 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:16:13,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:16:13,087 INFO L82 PathProgramCache]: Analyzing trace with hash -715866073, now seen corresponding path program 1 times [2020-10-12 20:16:13,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:16:13,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654597435] [2020-10-12 20:16:13,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:16:13,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:13,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:13,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:13,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:13,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:13,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:13,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:14,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:14,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:18,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:18,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 20:16:18,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:16:18,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 20:16:18,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:18,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:16:18,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-12 20:16:18,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 20:16:18,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:18,343 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:16:18,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:16:18,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:18,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:18,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:18,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:16:18,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:16:18,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:16:18,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:18,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:16:18,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:16:18,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:16:18,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:18,368 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 20:16:18,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654597435] [2020-10-12 20:16:18,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:16:18,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:16:18,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706604968] [2020-10-12 20:16:18,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:16:18,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:16:18,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:16:18,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:16:18,371 INFO L87 Difference]: Start difference. First operand 41397 states and 67341 transitions. Second operand 7 states. [2020-10-12 20:16:18,608 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-12 20:16:24,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:16:24,029 INFO L93 Difference]: Finished difference Result 86452 states and 140709 transitions. [2020-10-12 20:16:24,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:16:24,030 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 71 [2020-10-12 20:16:24,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:16:24,144 INFO L225 Difference]: With dead ends: 86452 [2020-10-12 20:16:24,144 INFO L226 Difference]: Without dead ends: 66244 [2020-10-12 20:16:24,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:16:24,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66244 states. [2020-10-12 20:16:27,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66244 to 52070. [2020-10-12 20:16:27,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52070 states. [2020-10-12 20:16:27,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52070 states to 52070 states and 84732 transitions. [2020-10-12 20:16:27,434 INFO L78 Accepts]: Start accepts. Automaton has 52070 states and 84732 transitions. Word has length 71 [2020-10-12 20:16:27,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:16:27,434 INFO L479 AbstractCegarLoop]: Abstraction has 52070 states and 84732 transitions. [2020-10-12 20:16:27,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:16:27,434 INFO L276 IsEmpty]: Start isEmpty. Operand 52070 states and 84732 transitions. [2020-10-12 20:16:27,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 20:16:27,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:16:27,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:16:27,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 20:16:27,437 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:16:27,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:16:27,437 INFO L82 PathProgramCache]: Analyzing trace with hash -807738537, now seen corresponding path program 1 times [2020-10-12 20:16:27,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:16:27,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340570497] [2020-10-12 20:16:27,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:16:27,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:27,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:27,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:27,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:27,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:27,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:28,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:28,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 20:16:28,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:16:28,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 724 [2020-10-12 20:16:28,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:28,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:16:28,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:16:28,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 20:16:28,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:28,631 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:16:28,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:16:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:28,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:28,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:28,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:16:28,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:16:28,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 20:16:28,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:28,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:16:28,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:16:28,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:16:28,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:28,664 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 20:16:28,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340570497] [2020-10-12 20:16:28,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:16:28,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:16:28,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183489417] [2020-10-12 20:16:28,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:16:28,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:16:28,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:16:28,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:16:28,666 INFO L87 Difference]: Start difference. First operand 52070 states and 84732 transitions. Second operand 6 states. [2020-10-12 20:16:28,917 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-12 20:16:34,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:16:34,382 INFO L93 Difference]: Finished difference Result 114477 states and 186319 transitions. [2020-10-12 20:16:34,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:16:34,383 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-12 20:16:34,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:16:34,473 INFO L225 Difference]: With dead ends: 114477 [2020-10-12 20:16:34,474 INFO L226 Difference]: Without dead ends: 62722 [2020-10-12 20:16:34,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:16:34,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62722 states. [2020-10-12 20:16:37,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62722 to 52070. [2020-10-12 20:16:37,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52070 states. [2020-10-12 20:16:37,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52070 states to 52070 states and 84628 transitions. [2020-10-12 20:16:37,845 INFO L78 Accepts]: Start accepts. Automaton has 52070 states and 84628 transitions. Word has length 71 [2020-10-12 20:16:37,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:16:37,845 INFO L479 AbstractCegarLoop]: Abstraction has 52070 states and 84628 transitions. [2020-10-12 20:16:37,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:16:37,846 INFO L276 IsEmpty]: Start isEmpty. Operand 52070 states and 84628 transitions. [2020-10-12 20:16:37,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 20:16:37,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:16:37,848 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:16:37,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 20:16:37,848 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:16:37,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:16:37,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1881593207, now seen corresponding path program 1 times [2020-10-12 20:16:37,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:16:37,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792946655] [2020-10-12 20:16:37,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:16:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:37,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:37,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:37,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:38,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:38,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:38,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:39,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:39,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:42,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:42,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 20:16:42,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:16:42,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 20:16:42,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:42,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:16:42,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 20:16:42,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 20:16:42,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:43,087 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:16:43,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:16:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:43,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:43,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:43,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:16:43,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:16:43,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:16:43,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:43,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:16:43,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:16:43,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:16:43,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:43,111 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 20:16:43,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792946655] [2020-10-12 20:16:43,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:16:43,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:16:43,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496316331] [2020-10-12 20:16:43,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:16:43,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:16:43,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:16:43,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:16:43,113 INFO L87 Difference]: Start difference. First operand 52070 states and 84628 transitions. Second operand 7 states. [2020-10-12 20:16:43,341 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-12 20:16:49,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:16:49,445 INFO L93 Difference]: Finished difference Result 93277 states and 151630 transitions. [2020-10-12 20:16:49,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:16:49,446 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 71 [2020-10-12 20:16:49,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:16:49,565 INFO L225 Difference]: With dead ends: 93277 [2020-10-12 20:16:49,565 INFO L226 Difference]: Without dead ends: 73145 [2020-10-12 20:16:49,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:16:49,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73145 states. [2020-10-12 20:16:53,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73145 to 59455. [2020-10-12 20:16:53,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59455 states. [2020-10-12 20:16:53,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59455 states to 59455 states and 96639 transitions. [2020-10-12 20:16:53,551 INFO L78 Accepts]: Start accepts. Automaton has 59455 states and 96639 transitions. Word has length 71 [2020-10-12 20:16:53,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:16:53,551 INFO L479 AbstractCegarLoop]: Abstraction has 59455 states and 96639 transitions. [2020-10-12 20:16:53,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:16:53,551 INFO L276 IsEmpty]: Start isEmpty. Operand 59455 states and 96639 transitions. [2020-10-12 20:16:53,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:16:53,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:16:53,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:16:53,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 20:16:53,554 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:16:53,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:16:53,555 INFO L82 PathProgramCache]: Analyzing trace with hash -884162453, now seen corresponding path program 1 times [2020-10-12 20:16:53,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:16:53,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606063476] [2020-10-12 20:16:53,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:16:53,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:53,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:53,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:53,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:53,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:54,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:56,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:58,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:58,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:16:58,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 20:16:58,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 20:16:58,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:58,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:16:58,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:16:58,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 20:16:58,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:58,828 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:16:58,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:16:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:58,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:58,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:58,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:16:58,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:16:58,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 20:16:58,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:58,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:16:58,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:16:58,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:16:58,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:58,859 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 20:16:58,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606063476] [2020-10-12 20:16:58,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:16:58,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:16:58,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027030883] [2020-10-12 20:16:58,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:16:58,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:16:58,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:16:58,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:16:58,862 INFO L87 Difference]: Start difference. First operand 59455 states and 96639 transitions. Second operand 8 states. [2020-10-12 20:16:59,095 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-12 20:17:07,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:17:07,789 INFO L93 Difference]: Finished difference Result 156118 states and 253434 transitions. [2020-10-12 20:17:07,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 20:17:07,790 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2020-10-12 20:17:07,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:17:07,946 INFO L225 Difference]: With dead ends: 156118 [2020-10-12 20:17:07,946 INFO L226 Difference]: Without dead ends: 96819 [2020-10-12 20:17:07,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-12 20:17:08,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96819 states. [2020-10-12 20:17:12,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96819 to 59455. [2020-10-12 20:17:12,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59455 states. [2020-10-12 20:17:12,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59455 states to 59455 states and 95146 transitions. [2020-10-12 20:17:12,648 INFO L78 Accepts]: Start accepts. Automaton has 59455 states and 95146 transitions. Word has length 72 [2020-10-12 20:17:12,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:17:12,649 INFO L479 AbstractCegarLoop]: Abstraction has 59455 states and 95146 transitions. [2020-10-12 20:17:12,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:17:12,649 INFO L276 IsEmpty]: Start isEmpty. Operand 59455 states and 95146 transitions. [2020-10-12 20:17:12,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:17:12,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:17:12,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:17:12,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 20:17:12,651 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:17:12,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:17:12,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1637048765, now seen corresponding path program 1 times [2020-10-12 20:17:12,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:17:12,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608340171] [2020-10-12 20:17:12,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:17:12,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:12,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:12,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:12,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:12,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:12,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:13,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:15,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:15,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:17:15,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 20:17:15,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2544 [2020-10-12 20:17:15,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:15,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:17:15,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 20:17:15,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 20:17:15,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:17:15,411 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:17:15,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:17:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:15,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:15,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:15,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:17:15,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:17:15,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 20:17:15,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:15,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:17:15,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:17:15,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:17:15,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:17:15,429 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 20:17:15,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608340171] [2020-10-12 20:17:15,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:17:15,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:17:15,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154223245] [2020-10-12 20:17:15,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:17:15,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:17:15,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:17:15,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:17:15,431 INFO L87 Difference]: Start difference. First operand 59455 states and 95146 transitions. Second operand 5 states. [2020-10-12 20:17:15,658 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-12 20:17:21,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:17:21,902 INFO L93 Difference]: Finished difference Result 107256 states and 171772 transitions. [2020-10-12 20:17:21,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:17:21,902 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-12 20:17:21,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:17:22,057 INFO L225 Difference]: With dead ends: 107256 [2020-10-12 20:17:22,058 INFO L226 Difference]: Without dead ends: 67568 [2020-10-12 20:17:22,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:17:22,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67568 states. [2020-10-12 20:17:27,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67568 to 63725. [2020-10-12 20:17:27,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63725 states. [2020-10-12 20:17:27,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63725 states to 63725 states and 102182 transitions. [2020-10-12 20:17:27,234 INFO L78 Accepts]: Start accepts. Automaton has 63725 states and 102182 transitions. Word has length 72 [2020-10-12 20:17:27,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:17:27,234 INFO L479 AbstractCegarLoop]: Abstraction has 63725 states and 102182 transitions. [2020-10-12 20:17:27,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:17:27,234 INFO L276 IsEmpty]: Start isEmpty. Operand 63725 states and 102182 transitions. [2020-10-12 20:17:27,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:17:27,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:17:27,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:17:27,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 20:17:27,237 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:17:27,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:17:27,238 INFO L82 PathProgramCache]: Analyzing trace with hash -579982883, now seen corresponding path program 1 times [2020-10-12 20:17:27,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:17:27,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865913674] [2020-10-12 20:17:27,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:17:27,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:27,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:27,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:27,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:27,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:27,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:27,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:27,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:30,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:32,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:32,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:17:32,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:17:32,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 20:17:32,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:32,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:17:32,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 20:17:32,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 20:17:32,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:17:32,467 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:17:32,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:17:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:32,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:32,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:32,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:17:32,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:17:32,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:17:32,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:32,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:17:32,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:17:32,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:17:32,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:17:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:17:32,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865913674] [2020-10-12 20:17:32,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:17:32,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:17:32,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990717232] [2020-10-12 20:17:32,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:17:32,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:17:32,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:17:32,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:17:32,489 INFO L87 Difference]: Start difference. First operand 63725 states and 102182 transitions. Second operand 5 states. [2020-10-12 20:17:32,704 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-12 20:17:39,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:17:39,247 INFO L93 Difference]: Finished difference Result 133228 states and 213678 transitions. [2020-10-12 20:17:39,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:17:39,248 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-12 20:17:39,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:17:39,400 INFO L225 Difference]: With dead ends: 133228 [2020-10-12 20:17:39,401 INFO L226 Difference]: Without dead ends: 70830 [2020-10-12 20:17:39,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:17:39,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70830 states. [2020-10-12 20:17:44,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70830 to 66126. [2020-10-12 20:17:44,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66126 states. [2020-10-12 20:17:45,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66126 states to 66126 states and 106167 transitions. [2020-10-12 20:17:45,108 INFO L78 Accepts]: Start accepts. Automaton has 66126 states and 106167 transitions. Word has length 72 [2020-10-12 20:17:45,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:17:45,109 INFO L479 AbstractCegarLoop]: Abstraction has 66126 states and 106167 transitions. [2020-10-12 20:17:45,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:17:45,109 INFO L276 IsEmpty]: Start isEmpty. Operand 66126 states and 106167 transitions. [2020-10-12 20:17:45,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:17:45,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:17:45,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:17:45,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 20:17:45,112 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:17:45,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:17:45,112 INFO L82 PathProgramCache]: Analyzing trace with hash -511424921, now seen corresponding path program 1 times [2020-10-12 20:17:45,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:17:45,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434620893] [2020-10-12 20:17:45,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:17:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:45,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:45,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:45,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:45,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:45,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:45,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:45,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:17:45,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:17:45,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 422 [2020-10-12 20:17:45,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:45,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:17:45,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-12 20:17:45,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 20:17:45,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:17:45,745 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:17:45,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:17:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:45,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:45,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:45,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:17:45,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:17:45,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 20:17:45,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:45,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:17:45,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:17:45,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:17:45,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:17:45,764 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 20:17:45,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434620893] [2020-10-12 20:17:45,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:17:45,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:17:45,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329265202] [2020-10-12 20:17:45,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:17:45,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:17:45,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:17:45,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:17:45,765 INFO L87 Difference]: Start difference. First operand 66126 states and 106167 transitions. Second operand 4 states. [2020-10-12 20:17:45,956 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-12 20:17:53,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:17:53,659 INFO L93 Difference]: Finished difference Result 141456 states and 226981 transitions. [2020-10-12 20:17:53,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:17:53,659 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-12 20:17:53,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:17:53,762 INFO L225 Difference]: With dead ends: 141456 [2020-10-12 20:17:53,762 INFO L226 Difference]: Without dead ends: 75540 [2020-10-12 20:17:53,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:17:53,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75540 states. [2020-10-12 20:17:59,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75540 to 75538. [2020-10-12 20:17:59,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75538 states. [2020-10-12 20:17:59,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75538 states to 75538 states and 120837 transitions. [2020-10-12 20:17:59,928 INFO L78 Accepts]: Start accepts. Automaton has 75538 states and 120837 transitions. Word has length 72 [2020-10-12 20:17:59,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:17:59,928 INFO L479 AbstractCegarLoop]: Abstraction has 75538 states and 120837 transitions. [2020-10-12 20:17:59,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:17:59,928 INFO L276 IsEmpty]: Start isEmpty. Operand 75538 states and 120837 transitions. [2020-10-12 20:17:59,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 20:17:59,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:17:59,931 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:17:59,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 20:17:59,932 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:17:59,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:17:59,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1449139749, now seen corresponding path program 1 times [2020-10-12 20:17:59,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:17:59,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116311209] [2020-10-12 20:17:59,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:17:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:59,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:59,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:00,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:00,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:00,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:00,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:02,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:02,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 20:18:02,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 20:18:02,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2719 [2020-10-12 20:18:02,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:02,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:18:02,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 20:18:02,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 20:18:02,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:02,879 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:18:02,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:18:02,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:02,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:02,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:02,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:18:02,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:18:02,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:18:02,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:02,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:18:02,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:18:02,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:18:02,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:02,901 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 20:18:02,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116311209] [2020-10-12 20:18:02,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:18:02,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:18:02,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692627234] [2020-10-12 20:18:02,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:18:02,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:18:02,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:18:02,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:18:02,903 INFO L87 Difference]: Start difference. First operand 75538 states and 120837 transitions. Second operand 7 states. [2020-10-12 20:18:03,121 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-12 20:18:14,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:18:14,625 INFO L93 Difference]: Finished difference Result 150929 states and 242017 transitions. [2020-10-12 20:18:14,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:18:14,625 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 74 [2020-10-12 20:18:14,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:18:14,800 INFO L225 Difference]: With dead ends: 150929 [2020-10-12 20:18:14,800 INFO L226 Difference]: Without dead ends: 112045 [2020-10-12 20:18:14,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:18:14,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112045 states. [2020-10-12 20:18:22,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112045 to 86724. [2020-10-12 20:18:22,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86724 states. [2020-10-12 20:18:22,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86724 states to 86724 states and 138869 transitions. [2020-10-12 20:18:22,399 INFO L78 Accepts]: Start accepts. Automaton has 86724 states and 138869 transitions. Word has length 74 [2020-10-12 20:18:22,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:18:22,400 INFO L479 AbstractCegarLoop]: Abstraction has 86724 states and 138869 transitions. [2020-10-12 20:18:22,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:18:22,400 INFO L276 IsEmpty]: Start isEmpty. Operand 86724 states and 138869 transitions. [2020-10-12 20:18:22,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 20:18:22,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:18:22,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:18:22,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 20:18:22,403 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:18:22,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:18:22,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1878213613, now seen corresponding path program 1 times [2020-10-12 20:18:22,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:18:22,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585439431] [2020-10-12 20:18:22,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:18:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:22,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:22,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:22,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:22,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:22,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:22,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:23,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:26,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:26,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 20:18:26,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:18:26,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4465 [2020-10-12 20:18:26,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:26,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:18:26,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:18:26,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 20:18:26,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:27,131 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:18:27,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:18:27,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:18:27,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:18:27,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:18:27,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:18:27,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:18:27,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:18:27,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:18:27,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:18:27,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:18:27,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:18:27,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:18:27,162 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 20:18:27,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585439431] [2020-10-12 20:18:27,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:18:27,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:18:27,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289620220] [2020-10-12 20:18:27,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:18:27,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:18:27,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:18:27,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:18:27,165 INFO L87 Difference]: Start difference. First operand 86724 states and 138869 transitions. Second operand 5 states. [2020-10-12 20:18:43,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:18:43,273 INFO L93 Difference]: Finished difference Result 253499 states and 405607 transitions. [2020-10-12 20:18:43,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:18:43,274 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-12 20:18:43,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:18:43,538 INFO L225 Difference]: With dead ends: 253499 [2020-10-12 20:18:43,538 INFO L226 Difference]: Without dead ends: 166956 [2020-10-12 20:18:43,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:18:43,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166956 states.