/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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 language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:27:53,396 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:27:53,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:27:53,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:27:53,459 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:27:53,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:27:53,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:27:53,474 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:27:53,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:27:53,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:27:53,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:27:53,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:27:53,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:27:53,491 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:27:53,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:27:53,495 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:27:53,496 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:27:53,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:27:53,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:27:53,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:27:53,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:27:53,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:27:53,520 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:27:53,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:27:53,545 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:27:53,546 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:27:53,546 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:27:53,549 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:27:53,549 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:27:53,551 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:27:53,551 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:27:53,552 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:27:53,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:27:53,555 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:27:53,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:27:53,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:27:53,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:27:53,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:27:53,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:27:53,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:27:53,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:27:53,565 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 [2020-10-29 13:27:53,611 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:27:53,611 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:27:53,615 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:27:53,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:27:53,616 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:27:53,616 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:27:53,616 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:27:53,616 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:27:53,617 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:27:53,617 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:27:53,618 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:27:53,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:27:53,618 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:27:53,619 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:27:53,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:27:53,619 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:27:53,619 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:27:53,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:27:53,620 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:27:53,620 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:27:53,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:27:53,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:27:53,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:27:53,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:27:53,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:27:53,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:27:53,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:27:53,622 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:27:53,622 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:27:53,622 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:27:54,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:27:54,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:27:54,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:27:54,117 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:27:54,118 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:27:54,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-29 13:27:54,199 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ead045df5/985069c54ece41ac914340acbc680d68/FLAGd44caee91 [2020-10-29 13:27:54,827 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:27:54,827 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-29 13:27:54,856 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ead045df5/985069c54ece41ac914340acbc680d68/FLAGd44caee91 [2020-10-29 13:27:55,157 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ead045df5/985069c54ece41ac914340acbc680d68 [2020-10-29 13:27:55,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:27:55,169 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:27:55,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:27:55,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:27:55,178 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:27:55,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:27:55" (1/1) ... [2020-10-29 13:27:55,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d43afb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:27:55, skipping insertion in model container [2020-10-29 13:27:55,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:27:55" (1/1) ... [2020-10-29 13:27:55,198 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:27:55,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:27:55,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:27:55,626 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:27:55,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:27:55,735 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:27:55,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:27:55 WrapperNode [2020-10-29 13:27:55,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:27:55,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:27:55,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:27:55,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:27:55,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:27:55" (1/1) ... [2020-10-29 13:27:55,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:27:55" (1/1) ... [2020-10-29 13:27:55,762 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:27:55" (1/1) ... [2020-10-29 13:27:55,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:27:55" (1/1) ... [2020-10-29 13:27:55,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:27:55" (1/1) ... [2020-10-29 13:27:55,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:27:55" (1/1) ... [2020-10-29 13:27:55,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:27:55" (1/1) ... [2020-10-29 13:27:55,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:27:55,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:27:55,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:27:55,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:27:55,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:27:55" (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 [2020-10-29 13:27:55,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:27:55,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:27:55,900 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:27:55,900 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:27:55,900 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:27:55,901 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:27:55,901 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:27:55,901 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:27:55,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:27:55,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:27:55,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:27:55,902 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:27:55,902 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:27:55,902 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:27:55,902 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:27:55,902 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:27:55,902 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:27:55,902 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:27:55,903 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:27:55,903 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-29 13:27:55,903 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-29 13:27:55,903 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:27:55,903 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:27:55,903 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:27:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:27:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:27:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:27:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:27:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:27:55,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:27:56,575 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:27:56,576 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:27:56,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:27:56 BoogieIcfgContainer [2020-10-29 13:27:56,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:27:56,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:27:56,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:27:56,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:27:56,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:27:55" (1/3) ... [2020-10-29 13:27:56,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d5618dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:27:56, skipping insertion in model container [2020-10-29 13:27:56,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:27:55" (2/3) ... [2020-10-29 13:27:56,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d5618dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:27:56, skipping insertion in model container [2020-10-29 13:27:56,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:27:56" (3/3) ... [2020-10-29 13:27:56,587 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-29 13:27:56,597 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:27:56,602 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:27:56,615 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:27:56,643 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:27:56,643 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:27:56,643 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:27:56,643 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:27:56,643 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:27:56,644 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:27:56,644 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:27:56,644 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:27:56,664 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states. [2020-10-29 13:27:56,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 13:27:56,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:27:56,676 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:27:56,677 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:27:56,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:27:56,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1924019343, now seen corresponding path program 1 times [2020-10-29 13:27:56,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:27:56,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159248365] [2020-10-29 13:27:56,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:27:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:27:57,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:57,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:57,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:57,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:58,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:27:58,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:00,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:01,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:01,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-29 13:28:01,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:28:01,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 13:28:02,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:02,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:02,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:28:02,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:28:02,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-29 13:28:02,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:28:02,444 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:28:02,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:28:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:02,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:02,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:02,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:28:02,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:28:02,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 13:28:02,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:02,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:02,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:28:02,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:28:02,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:28:02,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:28:02,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:28:02,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159248365] [2020-10-29 13:28:02,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:28:02,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:28:02,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390556840] [2020-10-29 13:28:02,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:28:02,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:28:02,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:28:02,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:28:02,584 INFO L87 Difference]: Start difference. First operand 125 states. Second operand 9 states. [2020-10-29 13:28:03,045 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 13:28:04,415 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-29 13:28:04,763 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:28:05,271 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-29 13:28:05,658 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-29 13:28:06,029 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 13:28:06,415 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:28:06,778 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:28:07,152 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 13:28:07,565 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-29 13:28:07,902 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-29 13:28:08,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:28:08,131 INFO L93 Difference]: Finished difference Result 1025 states and 1624 transitions. [2020-10-29 13:28:08,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 13:28:08,134 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-10-29 13:28:08,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:28:08,168 INFO L225 Difference]: With dead ends: 1025 [2020-10-29 13:28:08,168 INFO L226 Difference]: Without dead ends: 899 [2020-10-29 13:28:08,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2020-10-29 13:28:08,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2020-10-29 13:28:08,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 186. [2020-10-29 13:28:08,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-29 13:28:08,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 267 transitions. [2020-10-29 13:28:08,275 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 267 transitions. Word has length 77 [2020-10-29 13:28:08,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:28:08,276 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 267 transitions. [2020-10-29 13:28:08,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:28:08,276 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 267 transitions. [2020-10-29 13:28:08,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-29 13:28:08,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:28:08,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:28:08,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:28:08,281 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:28:08,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:28:08,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1590694558, now seen corresponding path program 1 times [2020-10-29 13:28:08,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:28:08,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150893503] [2020-10-29 13:28:08,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:28:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:08,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:08,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:08,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:08,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:08,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:09,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:10,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:10,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:13,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:13,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 13:28:13,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:28:13,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:28:13,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:13,323 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:13,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:28:13,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-29 13:28:13,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-29 13:28:13,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:28:13,687 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:28:13,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:28:13,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:13,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:13,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:13,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:28:13,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:28:13,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 13:28:13,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:13,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:13,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:28:13,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:28:13,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:28:13,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:13,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:28:13,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150893503] [2020-10-29 13:28:13,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:28:13,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:28:13,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640933184] [2020-10-29 13:28:13,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:28:13,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:28:13,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:28:13,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:28:13,745 INFO L87 Difference]: Start difference. First operand 186 states and 267 transitions. Second operand 4 states. [2020-10-29 13:28:14,068 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:28:14,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:28:14,678 INFO L93 Difference]: Finished difference Result 448 states and 681 transitions. [2020-10-29 13:28:14,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:28:14,679 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-29 13:28:14,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:28:14,682 INFO L225 Difference]: With dead ends: 448 [2020-10-29 13:28:14,682 INFO L226 Difference]: Without dead ends: 309 [2020-10-29 13:28:14,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:28:14,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-29 13:28:14,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 306. [2020-10-29 13:28:14,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-29 13:28:14,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 457 transitions. [2020-10-29 13:28:14,721 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 457 transitions. Word has length 79 [2020-10-29 13:28:14,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:28:14,722 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 457 transitions. [2020-10-29 13:28:14,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:28:14,722 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 457 transitions. [2020-10-29 13:28:14,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:28:14,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:28:14,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:28:14,725 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:28:14,725 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:28:14,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:28:14,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1501429476, now seen corresponding path program 1 times [2020-10-29 13:28:14,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:28:14,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040772919] [2020-10-29 13:28:14,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:28:14,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:14,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:14,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:14,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:14,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:14,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:15,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:16,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:17,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:17,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:19,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:19,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:28:19,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:28:19,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-29 13:28:19,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:19,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:19,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:28:19,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:28:19,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 13:28:19,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:28:20,196 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:28:20,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:28:20,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:20,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:20,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:20,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:28:20,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:28:20,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-29 13:28:20,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:20,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:20,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:28:20,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:28:20,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:28:20,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:28:20,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:28:20,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040772919] [2020-10-29 13:28:20,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:28:20,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:28:20,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260800402] [2020-10-29 13:28:20,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:28:20,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:28:20,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:28:20,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:28:20,270 INFO L87 Difference]: Start difference. First operand 306 states and 457 transitions. Second operand 6 states. [2020-10-29 13:28:20,632 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 13:28:21,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:28:21,238 INFO L93 Difference]: Finished difference Result 565 states and 867 transitions. [2020-10-29 13:28:21,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:28:21,240 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-10-29 13:28:21,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:28:21,242 INFO L225 Difference]: With dead ends: 565 [2020-10-29 13:28:21,242 INFO L226 Difference]: Without dead ends: 306 [2020-10-29 13:28:21,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:28:21,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-29 13:28:21,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2020-10-29 13:28:21,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-29 13:28:21,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 455 transitions. [2020-10-29 13:28:21,283 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 455 transitions. Word has length 80 [2020-10-29 13:28:21,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:28:21,284 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 455 transitions. [2020-10-29 13:28:21,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:28:21,284 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 455 transitions. [2020-10-29 13:28:21,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:28:21,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:28:21,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:28:21,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:28:21,287 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:28:21,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:28:21,287 INFO L82 PathProgramCache]: Analyzing trace with hash -340601057, now seen corresponding path program 1 times [2020-10-29 13:28:21,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:28:21,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518915893] [2020-10-29 13:28:21,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:28:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:21,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:21,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:21,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:21,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:21,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:21,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:23,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:25,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:26,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:26,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:28:26,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:28:26,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 13:28:26,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:26,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:26,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:28:26,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:28:26,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-29 13:28:26,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:28:26,730 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:28:26,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:28:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:26,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:26,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:26,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:28:26,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:28:26,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-29 13:28:26,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:26,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:26,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:28:26,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:28:26,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:28:26,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:28:26,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:28:26,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518915893] [2020-10-29 13:28:26,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:28:26,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:28:26,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256277915] [2020-10-29 13:28:26,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:28:26,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:28:26,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:28:26,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:28:26,822 INFO L87 Difference]: Start difference. First operand 306 states and 455 transitions. Second operand 7 states. [2020-10-29 13:28:27,165 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:28:27,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:28:27,990 INFO L93 Difference]: Finished difference Result 987 states and 1523 transitions. [2020-10-29 13:28:27,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:28:27,991 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 80 [2020-10-29 13:28:27,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:28:28,002 INFO L225 Difference]: With dead ends: 987 [2020-10-29 13:28:28,002 INFO L226 Difference]: Without dead ends: 728 [2020-10-29 13:28:28,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:28:28,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2020-10-29 13:28:28,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 311. [2020-10-29 13:28:28,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-10-29 13:28:28,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 462 transitions. [2020-10-29 13:28:28,060 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 462 transitions. Word has length 80 [2020-10-29 13:28:28,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:28:28,060 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 462 transitions. [2020-10-29 13:28:28,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:28:28,060 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 462 transitions. [2020-10-29 13:28:28,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:28:28,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:28:28,068 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:28:28,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:28:28,068 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:28:28,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:28:28,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1627320933, now seen corresponding path program 1 times [2020-10-29 13:28:28,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:28:28,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642530950] [2020-10-29 13:28:28,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:28:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:28,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:28,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:28,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:28,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:28,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:28,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:29,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:31,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:33,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:33,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:28:33,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:28:33,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 13:28:33,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:33,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:33,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:28:33,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:28:33,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 13:28:33,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:33,467 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:28:33,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:28:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:33,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:33,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:33,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:28:33,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:28:33,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 13:28:33,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:33,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:33,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:28:33,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:28:33,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:28:33,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 13:28:33,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:28:33,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642530950] [2020-10-29 13:28:33,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:28:33,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:28:33,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155605223] [2020-10-29 13:28:33,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:28:33,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:28:33,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:28:33,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:28:33,542 INFO L87 Difference]: Start difference. First operand 311 states and 462 transitions. Second operand 7 states. [2020-10-29 13:28:33,888 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:28:34,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:28:34,694 INFO L93 Difference]: Finished difference Result 957 states and 1473 transitions. [2020-10-29 13:28:34,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:28:34,695 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 80 [2020-10-29 13:28:34,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:28:34,700 INFO L225 Difference]: With dead ends: 957 [2020-10-29 13:28:34,700 INFO L226 Difference]: Without dead ends: 698 [2020-10-29 13:28:34,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:28:34,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-10-29 13:28:34,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 321. [2020-10-29 13:28:34,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-10-29 13:28:34,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 476 transitions. [2020-10-29 13:28:34,743 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 476 transitions. Word has length 80 [2020-10-29 13:28:34,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:28:34,744 INFO L481 AbstractCegarLoop]: Abstraction has 321 states and 476 transitions. [2020-10-29 13:28:34,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:28:34,744 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 476 transitions. [2020-10-29 13:28:34,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:28:34,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:28:34,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:28:34,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:28:34,746 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:28:34,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:28:34,747 INFO L82 PathProgramCache]: Analyzing trace with hash 637744427, now seen corresponding path program 1 times [2020-10-29 13:28:34,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:28:34,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160373906] [2020-10-29 13:28:34,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:28:34,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:34,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:34,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:34,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:34,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:34,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:35,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:35,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:38,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:39,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:39,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:28:39,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:28:39,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 13:28:39,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:39,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:39,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:28:39,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:28:39,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 13:28:39,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:40,145 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:28:40,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:28:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:40,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:40,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:40,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:28:40,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:28:40,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-29 13:28:40,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:40,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:40,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:28:40,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:28:40,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:28:40,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:40,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:28:40,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160373906] [2020-10-29 13:28:40,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:28:40,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:28:40,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320232158] [2020-10-29 13:28:40,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:28:40,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:28:40,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:28:40,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:28:40,230 INFO L87 Difference]: Start difference. First operand 321 states and 476 transitions. Second operand 7 states. [2020-10-29 13:28:40,574 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-29 13:28:41,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:28:41,355 INFO L93 Difference]: Finished difference Result 865 states and 1328 transitions. [2020-10-29 13:28:41,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:28:41,356 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 80 [2020-10-29 13:28:41,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:28:41,360 INFO L225 Difference]: With dead ends: 865 [2020-10-29 13:28:41,360 INFO L226 Difference]: Without dead ends: 606 [2020-10-29 13:28:41,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-29 13:28:41,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2020-10-29 13:28:41,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 331. [2020-10-29 13:28:41,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-10-29 13:28:41,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 491 transitions. [2020-10-29 13:28:41,409 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 491 transitions. Word has length 80 [2020-10-29 13:28:41,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:28:41,409 INFO L481 AbstractCegarLoop]: Abstraction has 331 states and 491 transitions. [2020-10-29 13:28:41,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:28:41,409 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 491 transitions. [2020-10-29 13:28:41,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:28:41,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:28:41,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:28:41,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:28:41,411 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:28:41,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:28:41,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1864836603, now seen corresponding path program 1 times [2020-10-29 13:28:41,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:28:41,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989992430] [2020-10-29 13:28:41,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:28:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:41,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:41,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:41,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:41,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:41,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:41,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:41,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:43,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:46,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:46,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:28:46,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:28:46,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:28:46,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:46,438 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:46,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:28:46,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:28:46,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-29 13:28:46,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:46,905 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:28:46,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:28:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:46,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:46,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:46,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:28:46,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:28:46,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 13:28:46,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:46,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:46,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:28:46,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:28:46,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:28:46,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:46,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:28:46,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989992430] [2020-10-29 13:28:46,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:28:46,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:28:46,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335923485] [2020-10-29 13:28:46,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:28:46,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:28:46,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:28:46,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:28:46,979 INFO L87 Difference]: Start difference. First operand 331 states and 491 transitions. Second operand 7 states. [2020-10-29 13:28:47,343 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-29 13:28:48,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:28:48,345 INFO L93 Difference]: Finished difference Result 861 states and 1314 transitions. [2020-10-29 13:28:48,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:28:48,345 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 80 [2020-10-29 13:28:48,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:28:48,349 INFO L225 Difference]: With dead ends: 861 [2020-10-29 13:28:48,349 INFO L226 Difference]: Without dead ends: 602 [2020-10-29 13:28:48,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:28:48,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-10-29 13:28:48,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 365. [2020-10-29 13:28:48,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-10-29 13:28:48,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 537 transitions. [2020-10-29 13:28:48,398 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 537 transitions. Word has length 80 [2020-10-29 13:28:48,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:28:48,399 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 537 transitions. [2020-10-29 13:28:48,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:28:48,399 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 537 transitions. [2020-10-29 13:28:48,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:28:48,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:28:48,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:28:48,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:28:48,400 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:28:48,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:28:48,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1634923985, now seen corresponding path program 1 times [2020-10-29 13:28:48,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:28:48,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981041630] [2020-10-29 13:28:48,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:28:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:48,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:48,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:48,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:48,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:48,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:49,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:49,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:49,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:52,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:52,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:28:52,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:28:52,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3778 [2020-10-29 13:28:52,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:52,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:52,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:28:52,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:28:52,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 13:28:52,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:52,586 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:28:52,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:28:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:52,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:52,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:52,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:28:52,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:28:52,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:28:52,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:52,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:52,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:28:52,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:28:52,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:28:52,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:28:52,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981041630] [2020-10-29 13:28:52,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:28:52,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:28:52,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75467534] [2020-10-29 13:28:52,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:28:52,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:28:52,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:28:52,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:28:52,628 INFO L87 Difference]: Start difference. First operand 365 states and 537 transitions. Second operand 5 states. [2020-10-29 13:28:52,956 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-29 13:28:53,849 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-29 13:28:54,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:28:54,138 INFO L93 Difference]: Finished difference Result 1163 states and 1781 transitions. [2020-10-29 13:28:54,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:28:54,138 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 80 [2020-10-29 13:28:54,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:28:54,143 INFO L225 Difference]: With dead ends: 1163 [2020-10-29 13:28:54,144 INFO L226 Difference]: Without dead ends: 904 [2020-10-29 13:28:54,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:28:54,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2020-10-29 13:28:54,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 898. [2020-10-29 13:28:54,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-10-29 13:28:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1357 transitions. [2020-10-29 13:28:54,265 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1357 transitions. Word has length 80 [2020-10-29 13:28:54,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:28:54,266 INFO L481 AbstractCegarLoop]: Abstraction has 898 states and 1357 transitions. [2020-10-29 13:28:54,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:28:54,266 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1357 transitions. [2020-10-29 13:28:54,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:28:54,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:28:54,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:28:54,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:28:54,268 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:28:54,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:28:54,268 INFO L82 PathProgramCache]: Analyzing trace with hash -2038513678, now seen corresponding path program 1 times [2020-10-29 13:28:54,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:28:54,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849419986] [2020-10-29 13:28:54,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:28:54,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:54,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:54,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:54,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:54,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:54,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:55,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:58,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:58,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:28:58,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:28:58,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4334 [2020-10-29 13:28:58,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:58,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:58,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:28:58,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 13:28:58,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-29 13:28:58,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:59,072 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:28:59,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:28:59,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:28:59,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:28:59,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:28:59,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:28:59,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:28:59,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:28:59,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:28:59,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:28:59,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:28:59,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:28:59,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:28:59,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:28:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:28:59,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849419986] [2020-10-29 13:28:59,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:28:59,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:28:59,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555780143] [2020-10-29 13:28:59,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:28:59,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:28:59,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:28:59,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:28:59,124 INFO L87 Difference]: Start difference. First operand 898 states and 1357 transitions. Second operand 9 states. [2020-10-29 13:28:59,597 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-29 13:29:00,571 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:29:00,951 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 13:29:01,734 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-29 13:29:02,076 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 13:29:02,489 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:29:02,859 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 13:29:03,230 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:29:03,565 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-29 13:29:03,919 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:29:04,302 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-29 13:29:04,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:29:04,669 INFO L93 Difference]: Finished difference Result 5126 states and 7941 transitions. [2020-10-29 13:29:04,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 13:29:04,669 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 80 [2020-10-29 13:29:04,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:29:04,693 INFO L225 Difference]: With dead ends: 5126 [2020-10-29 13:29:04,693 INFO L226 Difference]: Without dead ends: 4383 [2020-10-29 13:29:04,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2020-10-29 13:29:04,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4383 states. [2020-10-29 13:29:04,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4383 to 898. [2020-10-29 13:29:04,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 898 states. [2020-10-29 13:29:04,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1351 transitions. [2020-10-29 13:29:04,881 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1351 transitions. Word has length 80 [2020-10-29 13:29:04,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:29:04,881 INFO L481 AbstractCegarLoop]: Abstraction has 898 states and 1351 transitions. [2020-10-29 13:29:04,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:29:04,881 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1351 transitions. [2020-10-29 13:29:04,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:29:04,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:29:04,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:29:04,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:29:04,883 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:29:04,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:29:04,883 INFO L82 PathProgramCache]: Analyzing trace with hash 167616369, now seen corresponding path program 1 times [2020-10-29 13:29:04,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:29:04,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451604649] [2020-10-29 13:29:04,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:29:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:04,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:04,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:04,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:05,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:05,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:05,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:05,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:07,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:09,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:09,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:29:09,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:29:09,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:29:09,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:09,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:09,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-29 13:29:09,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:29:09,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-29 13:29:09,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:10,305 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:29:10,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:29:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:10,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:10,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:10,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:29:10,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:29:10,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:29:10,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:10,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:10,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:29:10,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:29:10,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:29:10,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:29:10,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451604649] [2020-10-29 13:29:10,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:29:10,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:29:10,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140877663] [2020-10-29 13:29:10,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 13:29:10,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:29:10,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 13:29:10,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:29:10,374 INFO L87 Difference]: Start difference. First operand 898 states and 1351 transitions. Second operand 7 states. [2020-10-29 13:29:10,697 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-29 13:29:11,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:29:11,733 INFO L93 Difference]: Finished difference Result 2510 states and 3820 transitions. [2020-10-29 13:29:11,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-29 13:29:11,734 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 80 [2020-10-29 13:29:11,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:29:11,742 INFO L225 Difference]: With dead ends: 2510 [2020-10-29 13:29:11,743 INFO L226 Difference]: Without dead ends: 1723 [2020-10-29 13:29:11,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-29 13:29:11,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2020-10-29 13:29:11,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 874. [2020-10-29 13:29:11,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 874 states. [2020-10-29 13:29:11,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1317 transitions. [2020-10-29 13:29:11,921 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1317 transitions. Word has length 80 [2020-10-29 13:29:11,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:29:11,922 INFO L481 AbstractCegarLoop]: Abstraction has 874 states and 1317 transitions. [2020-10-29 13:29:11,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 13:29:11,922 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1317 transitions. [2020-10-29 13:29:11,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-29 13:29:11,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:29:11,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:29:11,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:29:11,924 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:29:11,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:29:11,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1171186508, now seen corresponding path program 1 times [2020-10-29 13:29:11,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:29:11,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981254713] [2020-10-29 13:29:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:29:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:11,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:11,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:12,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:12,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:12,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:12,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:13,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:13,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 13:29:13,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:29:13,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1982 [2020-10-29 13:29:13,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:13,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:13,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:29:13,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 13:29:13,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 13:29:13,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:14,227 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:29:14,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:29:14,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:14,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:14,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:14,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:29:14,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:29:14,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:29:14,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:14,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:14,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:29:14,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:29:14,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:29:14,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:14,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:29:14,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981254713] [2020-10-29 13:29:14,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:29:14,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:29:14,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691227629] [2020-10-29 13:29:14,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:29:14,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:29:14,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:29:14,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:29:14,259 INFO L87 Difference]: Start difference. First operand 874 states and 1317 transitions. Second operand 4 states. [2020-10-29 13:29:14,558 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:29:15,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:29:15,326 INFO L93 Difference]: Finished difference Result 2298 states and 3513 transitions. [2020-10-29 13:29:15,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:29:15,327 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-29 13:29:15,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:29:15,334 INFO L225 Difference]: With dead ends: 2298 [2020-10-29 13:29:15,334 INFO L226 Difference]: Without dead ends: 1513 [2020-10-29 13:29:15,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:29:15,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2020-10-29 13:29:15,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1510. [2020-10-29 13:29:15,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1510 states. [2020-10-29 13:29:15,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 2287 transitions. [2020-10-29 13:29:15,592 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 2287 transitions. Word has length 81 [2020-10-29 13:29:15,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:29:15,592 INFO L481 AbstractCegarLoop]: Abstraction has 1510 states and 2287 transitions. [2020-10-29 13:29:15,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:29:15,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 2287 transitions. [2020-10-29 13:29:15,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 13:29:15,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:29:15,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:29:15,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:29:15,594 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:29:15,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:29:15,595 INFO L82 PathProgramCache]: Analyzing trace with hash -924613222, now seen corresponding path program 1 times [2020-10-29 13:29:15,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:29:15,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827088874] [2020-10-29 13:29:15,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:29:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:15,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:15,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:15,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:15,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:15,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:16,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:19,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:19,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 13:29:19,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:29:19,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3781 [2020-10-29 13:29:19,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:19,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:19,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:29:19,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:29:19,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-29 13:29:19,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:19,732 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:29:19,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:29:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:19,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:19,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:19,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:29:19,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:29:19,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:29:19,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:19,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:19,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:29:19,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:29:19,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:29:19,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:19,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:29:19,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827088874] [2020-10-29 13:29:19,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:29:19,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:29:19,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089782172] [2020-10-29 13:29:19,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:29:19,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:29:19,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:29:19,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:29:19,779 INFO L87 Difference]: Start difference. First operand 1510 states and 2287 transitions. Second operand 6 states. [2020-10-29 13:29:20,167 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:29:21,234 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-29 13:29:21,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:29:21,479 INFO L93 Difference]: Finished difference Result 4310 states and 6587 transitions. [2020-10-29 13:29:21,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:29:21,480 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-29 13:29:21,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:29:21,491 INFO L225 Difference]: With dead ends: 4310 [2020-10-29 13:29:21,492 INFO L226 Difference]: Without dead ends: 2885 [2020-10-29 13:29:21,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:29:21,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2020-10-29 13:29:21,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2882. [2020-10-29 13:29:21,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2882 states. [2020-10-29 13:29:21,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2882 states to 2882 states and 4385 transitions. [2020-10-29 13:29:21,980 INFO L78 Accepts]: Start accepts. Automaton has 2882 states and 4385 transitions. Word has length 82 [2020-10-29 13:29:21,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:29:21,980 INFO L481 AbstractCegarLoop]: Abstraction has 2882 states and 4385 transitions. [2020-10-29 13:29:21,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:29:21,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2882 states and 4385 transitions. [2020-10-29 13:29:21,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 13:29:21,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:29:21,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:29:21,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:29:21,985 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:29:21,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:29:21,986 INFO L82 PathProgramCache]: Analyzing trace with hash 851893589, now seen corresponding path program 1 times [2020-10-29 13:29:21,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:29:21,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950919041] [2020-10-29 13:29:21,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:29:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:22,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:22,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:22,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:22,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:22,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:23,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:23,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 13:29:23,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:29:23,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1099 [2020-10-29 13:29:23,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:23,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:23,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:29:23,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-29 13:29:23,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:29:23,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:23,446 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:29:23,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:29:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:23,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:23,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:23,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:29:23,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:29:23,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:29:23,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:23,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:23,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:29:23,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:29:23,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:29:23,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:29:23,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950919041] [2020-10-29 13:29:23,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:29:23,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:29:23,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217588544] [2020-10-29 13:29:23,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:29:23,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:29:23,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:29:23,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:29:23,477 INFO L87 Difference]: Start difference. First operand 2882 states and 4385 transitions. Second operand 4 states. [2020-10-29 13:29:23,810 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:29:25,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:29:25,000 INFO L93 Difference]: Finished difference Result 8034 states and 12259 transitions. [2020-10-29 13:29:25,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:29:25,001 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-29 13:29:25,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:29:25,021 INFO L225 Difference]: With dead ends: 8034 [2020-10-29 13:29:25,022 INFO L226 Difference]: Without dead ends: 5253 [2020-10-29 13:29:25,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:29:25,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5253 states. [2020-10-29 13:29:25,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5253 to 5250. [2020-10-29 13:29:25,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5250 states. [2020-10-29 13:29:25,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5250 states to 5250 states and 7943 transitions. [2020-10-29 13:29:25,947 INFO L78 Accepts]: Start accepts. Automaton has 5250 states and 7943 transitions. Word has length 82 [2020-10-29 13:29:25,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:29:25,947 INFO L481 AbstractCegarLoop]: Abstraction has 5250 states and 7943 transitions. [2020-10-29 13:29:25,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:29:25,947 INFO L276 IsEmpty]: Start isEmpty. Operand 5250 states and 7943 transitions. [2020-10-29 13:29:25,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-29 13:29:25,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:29:25,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:29:25,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 13:29:25,949 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:29:25,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:29:25,949 INFO L82 PathProgramCache]: Analyzing trace with hash -917208949, now seen corresponding path program 1 times [2020-10-29 13:29:25,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:29:25,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110552241] [2020-10-29 13:29:25,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:29:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:25,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:25,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:26,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:26,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:26,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:26,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 13:29:26,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:29:26,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 861 [2020-10-29 13:29:26,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:26,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:26,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:29:26,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 13:29:26,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 13:29:26,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:27,137 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:29:27,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:29:27,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:27,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:27,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:27,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:29:27,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:29:27,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:29:27,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:27,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:27,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:29:27,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:29:27,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:29:27,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:29:27,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110552241] [2020-10-29 13:29:27,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:29:27,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:29:27,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884535695] [2020-10-29 13:29:27,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:29:27,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:29:27,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:29:27,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:29:27,177 INFO L87 Difference]: Start difference. First operand 5250 states and 7943 transitions. Second operand 4 states. [2020-10-29 13:29:27,514 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:29:29,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:29:29,186 INFO L93 Difference]: Finished difference Result 11656 states and 17675 transitions. [2020-10-29 13:29:29,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:29:29,187 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-29 13:29:29,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:29:29,224 INFO L225 Difference]: With dead ends: 11656 [2020-10-29 13:29:29,224 INFO L226 Difference]: Without dead ends: 8226 [2020-10-29 13:29:29,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:29:29,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8226 states. [2020-10-29 13:29:30,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8226 to 8223. [2020-10-29 13:29:30,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8223 states. [2020-10-29 13:29:30,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8223 states to 8223 states and 12393 transitions. [2020-10-29 13:29:30,383 INFO L78 Accepts]: Start accepts. Automaton has 8223 states and 12393 transitions. Word has length 83 [2020-10-29 13:29:30,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:29:30,383 INFO L481 AbstractCegarLoop]: Abstraction has 8223 states and 12393 transitions. [2020-10-29 13:29:30,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:29:30,383 INFO L276 IsEmpty]: Start isEmpty. Operand 8223 states and 12393 transitions. [2020-10-29 13:29:30,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 13:29:30,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:29:30,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:29:30,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 13:29:30,385 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:29:30,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:29:30,385 INFO L82 PathProgramCache]: Analyzing trace with hash 664914679, now seen corresponding path program 1 times [2020-10-29 13:29:30,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:29:30,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035048308] [2020-10-29 13:29:30,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:29:30,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:30,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:30,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:30,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:30,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:31,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:31,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 13:29:31,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:29:31,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1302 [2020-10-29 13:29:31,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:31,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:31,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:29:31,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 13:29:31,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:29:31,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:32,018 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:29:32,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:29:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:32,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:32,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:32,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:29:32,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:29:32,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:29:32,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:32,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:32,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:29:32,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:29:32,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:29:32,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:29:32,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035048308] [2020-10-29 13:29:32,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:29:32,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:29:32,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287897386] [2020-10-29 13:29:32,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:29:32,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:29:32,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:29:32,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:29:32,054 INFO L87 Difference]: Start difference. First operand 8223 states and 12393 transitions. Second operand 4 states. [2020-10-29 13:29:32,377 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:29:34,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:29:34,841 INFO L93 Difference]: Finished difference Result 23242 states and 34935 transitions. [2020-10-29 13:29:34,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:29:34,842 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-29 13:29:34,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:29:34,874 INFO L225 Difference]: With dead ends: 23242 [2020-10-29 13:29:34,874 INFO L226 Difference]: Without dead ends: 15078 [2020-10-29 13:29:34,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:29:34,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15078 states. [2020-10-29 13:29:37,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15078 to 15075. [2020-10-29 13:29:37,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15075 states. [2020-10-29 13:29:37,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15075 states to 15075 states and 22443 transitions. [2020-10-29 13:29:37,044 INFO L78 Accepts]: Start accepts. Automaton has 15075 states and 22443 transitions. Word has length 84 [2020-10-29 13:29:37,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:29:37,045 INFO L481 AbstractCegarLoop]: Abstraction has 15075 states and 22443 transitions. [2020-10-29 13:29:37,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:29:37,045 INFO L276 IsEmpty]: Start isEmpty. Operand 15075 states and 22443 transitions. [2020-10-29 13:29:37,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-29 13:29:37,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:29:37,046 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:29:37,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 13:29:37,046 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:29:37,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:29:37,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1221292925, now seen corresponding path program 1 times [2020-10-29 13:29:37,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:29:37,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973084726] [2020-10-29 13:29:37,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:29:37,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:37,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:37,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:37,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:37,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:37,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-29 13:29:37,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:29:37,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 688 [2020-10-29 13:29:37,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:37,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:37,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:29:37,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-29 13:29:37,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 13:29:37,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:38,097 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:29:38,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:29:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:38,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:38,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:38,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:29:38,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:29:38,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:29:38,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:38,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:38,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:29:38,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:29:38,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:29:38,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:38,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:29:38,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973084726] [2020-10-29 13:29:38,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:29:38,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:29:38,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115410530] [2020-10-29 13:29:38,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:29:38,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:29:38,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:29:38,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:29:38,137 INFO L87 Difference]: Start difference. First operand 15075 states and 22443 transitions. Second operand 4 states. [2020-10-29 13:29:38,500 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-29 13:29:42,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:29:42,671 INFO L93 Difference]: Finished difference Result 42505 states and 62991 transitions. [2020-10-29 13:29:42,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:29:42,671 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2020-10-29 13:29:42,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:29:42,748 INFO L225 Difference]: With dead ends: 42505 [2020-10-29 13:29:42,748 INFO L226 Difference]: Without dead ends: 27509 [2020-10-29 13:29:42,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:29:42,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27509 states. [2020-10-29 13:29:47,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27509 to 27476. [2020-10-29 13:29:47,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27476 states. [2020-10-29 13:29:47,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27476 states to 27476 states and 40275 transitions. [2020-10-29 13:29:47,117 INFO L78 Accepts]: Start accepts. Automaton has 27476 states and 40275 transitions. Word has length 85 [2020-10-29 13:29:47,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:29:47,118 INFO L481 AbstractCegarLoop]: Abstraction has 27476 states and 40275 transitions. [2020-10-29 13:29:47,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:29:47,118 INFO L276 IsEmpty]: Start isEmpty. Operand 27476 states and 40275 transitions. [2020-10-29 13:29:47,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 13:29:47,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:29:47,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:29:47,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 13:29:47,119 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:29:47,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:29:47,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1523377905, now seen corresponding path program 1 times [2020-10-29 13:29:47,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:29:47,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532799925] [2020-10-29 13:29:47,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:29:47,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:47,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:47,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:47,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:47,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 13:29:47,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:29:47,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-29 13:29:47,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:47,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:47,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:29:47,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:29:47,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 13:29:47,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:47,902 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:29:47,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:29:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:29:47,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:29:47,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:29:47,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:29:47,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:29:47,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 13:29:47,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:29:47,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:29:47,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:29:47,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:29:47,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:29:47,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:29:47,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:29:47,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532799925] [2020-10-29 13:29:47,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:29:47,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:29:47,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544743416] [2020-10-29 13:29:47,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:29:47,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:29:47,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:29:47,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:29:47,964 INFO L87 Difference]: Start difference. First operand 27476 states and 40275 transitions. Second operand 6 states. [2020-10-29 13:29:48,338 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-29 13:29:49,786 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-29 13:29:56,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:29:56,316 INFO L93 Difference]: Finished difference Result 76282 states and 111607 transitions. [2020-10-29 13:29:56,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:29:56,316 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-10-29 13:29:56,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:29:56,478 INFO L225 Difference]: With dead ends: 76282 [2020-10-29 13:29:56,479 INFO L226 Difference]: Without dead ends: 48855 [2020-10-29 13:29:56,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:29:56,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48855 states. [2020-10-29 13:30:03,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48855 to 48852. [2020-10-29 13:30:03,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48852 states. [2020-10-29 13:30:04,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48852 states to 48852 states and 70995 transitions. [2020-10-29 13:30:04,082 INFO L78 Accepts]: Start accepts. Automaton has 48852 states and 70995 transitions. Word has length 86 [2020-10-29 13:30:04,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:30:04,082 INFO L481 AbstractCegarLoop]: Abstraction has 48852 states and 70995 transitions. [2020-10-29 13:30:04,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:30:04,083 INFO L276 IsEmpty]: Start isEmpty. Operand 48852 states and 70995 transitions. [2020-10-29 13:30:04,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 13:30:04,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:30:04,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:30:04,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 13:30:04,083 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:30:04,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:30:04,084 INFO L82 PathProgramCache]: Analyzing trace with hash 327266378, now seen corresponding path program 1 times [2020-10-29 13:30:04,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:30:04,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943231869] [2020-10-29 13:30:04,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:30:04,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:04,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:04,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:04,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 13:30:04,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:30:04,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-29 13:30:04,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:04,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:04,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:30:04,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-29 13:30:04,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:30:04,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:04,611 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:30:04,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:30:04,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:04,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:04,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:04,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:30:04,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:30:04,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 13:30:04,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:04,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:04,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:30:04,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:30:04,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:30:04,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:30:04,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943231869] [2020-10-29 13:30:04,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:30:04,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:30:04,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613417987] [2020-10-29 13:30:04,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:30:04,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:30:04,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:30:04,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:30:04,639 INFO L87 Difference]: Start difference. First operand 48852 states and 70995 transitions. Second operand 5 states. [2020-10-29 13:30:16,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:30:16,882 INFO L93 Difference]: Finished difference Result 81277 states and 117876 transitions. [2020-10-29 13:30:16,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:30:16,883 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 86 [2020-10-29 13:30:16,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:30:17,013 INFO L225 Difference]: With dead ends: 81277 [2020-10-29 13:30:17,013 INFO L226 Difference]: Without dead ends: 81274 [2020-10-29 13:30:17,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:30:17,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81274 states. [2020-10-29 13:30:25,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81274 to 49876. [2020-10-29 13:30:25,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49876 states. [2020-10-29 13:30:25,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49876 states to 49876 states and 71699 transitions. [2020-10-29 13:30:25,466 INFO L78 Accepts]: Start accepts. Automaton has 49876 states and 71699 transitions. Word has length 86 [2020-10-29 13:30:25,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:30:25,467 INFO L481 AbstractCegarLoop]: Abstraction has 49876 states and 71699 transitions. [2020-10-29 13:30:25,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:30:25,467 INFO L276 IsEmpty]: Start isEmpty. Operand 49876 states and 71699 transitions. [2020-10-29 13:30:25,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-29 13:30:25,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:30:25,475 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:30:25,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 13:30:25,475 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:30:25,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:30:25,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1290165545, now seen corresponding path program 1 times [2020-10-29 13:30:25,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:30:25,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644545425] [2020-10-29 13:30:25,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:30:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:25,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:25,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:25,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:25,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:25,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:27,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:27,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:30,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:30,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-29 13:30:30,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:30:30,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 13:30:30,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:30,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:30,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:30:30,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:30:30,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-29 13:30:30,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:30,737 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-29 13:30:31,101 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:30:31,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:30:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:30:31,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:30:31,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:30:31,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:30:31,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:30:31,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:30:31,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:30:31,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:30:31,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:30:31,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:30:31,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:30:31,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:30:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:30:31,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644545425] [2020-10-29 13:30:31,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:30:31,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-29 13:30:31,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656579423] [2020-10-29 13:30:31,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:30:31,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:30:31,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:30:31,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:30:31,147 INFO L87 Difference]: Start difference. First operand 49876 states and 71699 transitions. Second operand 9 states. [2020-10-29 13:30:31,574 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-29 13:30:36,673 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-29 13:30:37,238 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 191 [2020-10-29 13:31:02,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:31:02,873 INFO L93 Difference]: Finished difference Result 209013 states and 298385 transitions. [2020-10-29 13:31:02,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-29 13:31:02,880 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 116 [2020-10-29 13:31:02,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:31:03,275 INFO L225 Difference]: With dead ends: 209013 [2020-10-29 13:31:03,276 INFO L226 Difference]: Without dead ends: 159186 [2020-10-29 13:31:03,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=226, Invalid=766, Unknown=0, NotChecked=0, Total=992 [2020-10-29 13:31:03,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159186 states. [2020-10-29 13:31:17,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159186 to 78660. [2020-10-29 13:31:17,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78660 states. [2020-10-29 13:31:17,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78660 states to 78660 states and 112675 transitions. [2020-10-29 13:31:17,761 INFO L78 Accepts]: Start accepts. Automaton has 78660 states and 112675 transitions. Word has length 116 [2020-10-29 13:31:17,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:31:17,762 INFO L481 AbstractCegarLoop]: Abstraction has 78660 states and 112675 transitions. [2020-10-29 13:31:17,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:31:17,762 INFO L276 IsEmpty]: Start isEmpty. Operand 78660 states and 112675 transitions. [2020-10-29 13:31:17,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-29 13:31:17,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:31:17,774 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:31:17,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 13:31:17,774 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:31:17,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:31:17,774 INFO L82 PathProgramCache]: Analyzing trace with hash 799457571, now seen corresponding path program 1 times [2020-10-29 13:31:17,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:31:17,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263606768] [2020-10-29 13:31:17,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:31:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:31:18,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:18,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:18,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:18,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:18,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:22,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:22,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:22,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:31:22,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-29 13:31:22,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:31:22,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 13:31:22,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:31:22,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:31:22,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:31:22,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 13:31:22,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-29 13:31:22,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:31:23,183 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-29 13:31:23,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:31:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:31:23,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:31:23,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:31:23,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:31:23,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:31:23,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:31:23,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:31:23,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:31:23,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:31:23,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:31:23,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:31:23,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:31:23,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:31:23,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263606768] [2020-10-29 13:31:23,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:31:23,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 13:31:23,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273779310] [2020-10-29 13:31:23,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:31:23,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:31:23,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:31:23,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:31:23,225 INFO L87 Difference]: Start difference. First operand 78660 states and 112675 transitions. Second operand 6 states. [2020-10-29 13:31:23,604 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-29 13:31:25,566 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-29 13:31:26,137 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 186