/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=DEEPEST --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_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:26:56,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:26:56,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:26:56,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:26:56,528 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:26:56,529 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:26:56,531 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:26:56,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:26:56,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:26:56,537 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:26:56,538 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:26:56,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:26:56,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:26:56,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:26:56,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:26:56,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:26:56,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:26:56,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:26:56,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:26:56,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:26:56,553 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:26:56,555 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:26:56,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:26:56,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:26:56,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:26:56,562 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:26:56,562 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:26:56,563 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:26:56,564 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:26:56,565 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:26:56,565 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:26:56,566 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:26:56,567 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:26:56,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:26:56,570 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:26:56,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:26:56,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:26:56,571 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:26:56,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:26:56,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:26:56,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:26:56,591 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 [2020-10-27 23:26:56,620 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:26:56,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:26:56,622 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:26:56,623 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:26:56,623 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:26:56,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:26:56,623 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:26:56,623 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:26:56,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:26:56,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:26:56,624 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:26:56,624 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:26:56,624 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:26:56,625 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:26:56,625 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:26:56,625 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:26:56,625 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:26:56,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:26:56,626 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:26:56,626 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:26:56,626 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:26:56,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:26:56,626 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:26:56,627 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:26:56,627 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:26:56,627 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:26:56,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:26:56,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:26:56,628 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:26:56,628 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:26:57,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:26:57,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:26:57,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:26:57,078 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:26:57,079 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:26:57,079 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-27 23:26:57,156 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a7c61ef96/ee3c63be9708469cb30f27748d0b0a6b/FLAG5c943d6a9 [2020-10-27 23:26:57,896 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:26:57,897 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-27 23:26:57,917 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a7c61ef96/ee3c63be9708469cb30f27748d0b0a6b/FLAG5c943d6a9 [2020-10-27 23:26:58,119 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a7c61ef96/ee3c63be9708469cb30f27748d0b0a6b [2020-10-27 23:26:58,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:26:58,129 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:26:58,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:26:58,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:26:58,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:26:58,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:26:58" (1/1) ... [2020-10-27 23:26:58,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38211914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:58, skipping insertion in model container [2020-10-27 23:26:58,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:26:58" (1/1) ... [2020-10-27 23:26:58,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:26:58,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:26:58,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:26:58,667 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:26:58,817 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:26:58,854 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:26:58,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:58 WrapperNode [2020-10-27 23:26:58,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:26:58,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:26:58,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:26:58,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:26:58,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:58" (1/1) ... [2020-10-27 23:26:58,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:58" (1/1) ... [2020-10-27 23:26:58,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:58" (1/1) ... [2020-10-27 23:26:58,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:58" (1/1) ... [2020-10-27 23:26:58,923 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:58" (1/1) ... [2020-10-27 23:26:58,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:58" (1/1) ... [2020-10-27 23:26:58,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:58" (1/1) ... [2020-10-27 23:26:58,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:26:58,964 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:26:58,964 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:26:58,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:26:58,965 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:58" (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 [2020-10-27 23:26:59,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:26:59,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:26:59,062 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:26:59,062 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:26:59,062 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:26:59,062 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:26:59,063 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:26:59,063 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:26:59,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:26:59,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:26:59,063 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:26:59,064 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:26:59,064 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:26:59,064 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:26:59,064 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:26:59,064 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:26:59,064 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:26:59,065 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:26:59,065 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 23:26:59,065 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:26:59,065 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:26:59,065 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:26:59,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:26:59,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:26:59,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:26:59,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:26:59,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:26:59,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:27:00,614 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:27:00,614 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:27:00,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:27:00 BoogieIcfgContainer [2020-10-27 23:27:00,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:27:00,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:27:00,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:27:00,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:27:00,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:26:58" (1/3) ... [2020-10-27 23:27:00,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b99b54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:27:00, skipping insertion in model container [2020-10-27 23:27:00,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:26:58" (2/3) ... [2020-10-27 23:27:00,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68b99b54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:27:00, skipping insertion in model container [2020-10-27 23:27:00,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:27:00" (3/3) ... [2020-10-27 23:27:00,628 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-27 23:27:00,642 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:27:00,648 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:27:00,663 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:27:00,696 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:27:00,696 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:27:00,696 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:27:00,696 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:27:00,697 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:27:00,697 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:27:00,697 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:27:00,697 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:27:00,725 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states. [2020-10-27 23:27:00,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 23:27:00,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:00,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:27:00,744 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:00,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:00,751 INFO L82 PathProgramCache]: Analyzing trace with hash -2133154378, now seen corresponding path program 1 times [2020-10-27 23:27:00,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:00,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169974894] [2020-10-27 23:27:00,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:01,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:01,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:02,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:03,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:03,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:06,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:06,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 23:27:06,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 23:27:06,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-27 23:27:06,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:06,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 23:27:06,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-27 23:27:06,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 23:27:06,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 23:27:07,028 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-27 23:27:07,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:07,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:07,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:07,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:07,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:07,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 23:27:07,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:07,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:07,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:07,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:07,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 23:27:07,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:27:07,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169974894] [2020-10-27 23:27:07,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:07,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 23:27:07,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373789398] [2020-10-27 23:27:07,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 23:27:07,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:07,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 23:27:07,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:27:07,206 INFO L87 Difference]: Start difference. First operand 316 states. Second operand 7 states. [2020-10-27 23:27:07,878 WARN L193 SmtUtils]: Spent 554.00 ms on a formula simplification that was a NOOP. DAG size: 288 [2020-10-27 23:27:11,134 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification that was a NOOP. DAG size: 282 [2020-10-27 23:27:11,861 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2020-10-27 23:27:12,631 WARN L193 SmtUtils]: Spent 722.00 ms on a formula simplification that was a NOOP. DAG size: 286 [2020-10-27 23:27:13,513 WARN L193 SmtUtils]: Spent 614.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2020-10-27 23:27:14,233 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification that was a NOOP. DAG size: 286 [2020-10-27 23:27:14,916 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-27 23:27:15,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:15,082 INFO L93 Difference]: Finished difference Result 1372 states and 2341 transitions. [2020-10-27 23:27:15,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 23:27:15,084 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 104 [2020-10-27 23:27:15,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:15,124 INFO L225 Difference]: With dead ends: 1372 [2020-10-27 23:27:15,125 INFO L226 Difference]: Without dead ends: 1205 [2020-10-27 23:27:15,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-27 23:27:15,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2020-10-27 23:27:15,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 434. [2020-10-27 23:27:15,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2020-10-27 23:27:15,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 731 transitions. [2020-10-27 23:27:15,286 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 731 transitions. Word has length 104 [2020-10-27 23:27:15,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:15,288 INFO L481 AbstractCegarLoop]: Abstraction has 434 states and 731 transitions. [2020-10-27 23:27:15,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 23:27:15,289 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 731 transitions. [2020-10-27 23:27:15,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 23:27:15,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:15,305 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:27:15,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:27:15,306 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:15,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:15,307 INFO L82 PathProgramCache]: Analyzing trace with hash 539550290, now seen corresponding path program 1 times [2020-10-27 23:27:15,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:15,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418999852] [2020-10-27 23:27:15,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:15,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:15,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:15,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:16,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:16,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:16,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:20,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:20,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 23:27:20,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:27:20,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 23:27:20,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:20,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 23:27:20,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 23:27:20,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 23:27:20,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:21,107 WARN L193 SmtUtils]: Spent 544.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-27 23:27:21,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:21,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:21,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:21,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:21,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:21,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:21,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:27:21,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:21,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:21,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:21,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:21,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:27:21,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418999852] [2020-10-27 23:27:21,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:21,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 23:27:21,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972878280] [2020-10-27 23:27:21,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 23:27:21,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:21,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 23:27:21,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:27:21,174 INFO L87 Difference]: Start difference. First operand 434 states and 731 transitions. Second operand 8 states. [2020-10-27 23:27:21,898 WARN L193 SmtUtils]: Spent 648.00 ms on a formula simplification that was a NOOP. DAG size: 290 [2020-10-27 23:27:24,797 WARN L193 SmtUtils]: Spent 612.00 ms on a formula simplification that was a NOOP. DAG size: 282 [2020-10-27 23:27:25,493 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2020-10-27 23:27:26,224 WARN L193 SmtUtils]: Spent 653.00 ms on a formula simplification that was a NOOP. DAG size: 286 [2020-10-27 23:27:26,949 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification that was a NOOP. DAG size: 287 [2020-10-27 23:27:27,716 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification that was a NOOP. DAG size: 285 [2020-10-27 23:27:28,405 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification that was a NOOP. DAG size: 287 [2020-10-27 23:27:29,189 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-27 23:27:30,412 WARN L193 SmtUtils]: Spent 613.00 ms on a formula simplification that was a NOOP. DAG size: 287 [2020-10-27 23:27:31,108 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2020-10-27 23:27:32,333 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2020-10-27 23:27:33,074 WARN L193 SmtUtils]: Spent 698.00 ms on a formula simplification that was a NOOP. DAG size: 286 [2020-10-27 23:27:33,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:33,106 INFO L93 Difference]: Finished difference Result 3104 states and 5238 transitions. [2020-10-27 23:27:33,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 23:27:33,106 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 105 [2020-10-27 23:27:33,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:33,127 INFO L225 Difference]: With dead ends: 3104 [2020-10-27 23:27:33,128 INFO L226 Difference]: Without dead ends: 2851 [2020-10-27 23:27:33,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-10-27 23:27:33,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2020-10-27 23:27:33,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 1112. [2020-10-27 23:27:33,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1112 states. [2020-10-27 23:27:33,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1880 transitions. [2020-10-27 23:27:33,298 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1880 transitions. Word has length 105 [2020-10-27 23:27:33,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:33,301 INFO L481 AbstractCegarLoop]: Abstraction has 1112 states and 1880 transitions. [2020-10-27 23:27:33,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 23:27:33,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1880 transitions. [2020-10-27 23:27:33,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-27 23:27:33,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:33,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:27:33,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:27:33,307 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:33,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:33,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1930315087, now seen corresponding path program 1 times [2020-10-27 23:27:33,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:33,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119362128] [2020-10-27 23:27:33,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:33,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:33,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:33,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:33,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:34,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:34,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:38,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:38,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 23:27:38,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:27:38,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 23:27:38,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:38,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:27:38,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-27 23:27:38,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 23:27:38,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:39,039 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-27 23:27:39,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:39,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:39,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:39,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:39,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:39,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:39,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 23:27:39,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:39,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:39,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:39,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:39,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:27:39,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119362128] [2020-10-27 23:27:39,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:39,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:27:39,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583713284] [2020-10-27 23:27:39,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:27:39,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:39,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:27:39,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:27:39,153 INFO L87 Difference]: Start difference. First operand 1112 states and 1880 transitions. Second operand 5 states. [2020-10-27 23:27:39,768 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2020-10-27 23:27:42,435 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification that was a NOOP. DAG size: 282 [2020-10-27 23:27:42,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:42,649 INFO L93 Difference]: Finished difference Result 3672 states and 6217 transitions. [2020-10-27 23:27:42,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 23:27:42,650 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2020-10-27 23:27:42,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:42,669 INFO L225 Difference]: With dead ends: 3672 [2020-10-27 23:27:42,669 INFO L226 Difference]: Without dead ends: 2831 [2020-10-27 23:27:42,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:27:42,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2831 states. [2020-10-27 23:27:42,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2831 to 1980. [2020-10-27 23:27:42,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1980 states. [2020-10-27 23:27:42,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 3349 transitions. [2020-10-27 23:27:42,863 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 3349 transitions. Word has length 106 [2020-10-27 23:27:42,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:42,863 INFO L481 AbstractCegarLoop]: Abstraction has 1980 states and 3349 transitions. [2020-10-27 23:27:42,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:27:42,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 3349 transitions. [2020-10-27 23:27:42,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 23:27:42,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:42,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:27:42,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:27:42,867 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:42,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:42,868 INFO L82 PathProgramCache]: Analyzing trace with hash -2059317749, now seen corresponding path program 1 times [2020-10-27 23:27:42,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:42,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455227277] [2020-10-27 23:27:42,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:42,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:43,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:43,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:43,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:44,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:44,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:47,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:47,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-27 23:27:47,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:27:47,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-27 23:27:47,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:47,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:27:47,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-27 23:27:47,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 23:27:47,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:48,591 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-27 23:27:48,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:48,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:48,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:48,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:48,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:48,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:48,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 23:27:48,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:48,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:48,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:48,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:48,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:27:48,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455227277] [2020-10-27 23:27:48,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:48,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:27:48,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54546398] [2020-10-27 23:27:48,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:27:48,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:48,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:27:48,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:27:48,706 INFO L87 Difference]: Start difference. First operand 1980 states and 3349 transitions. Second operand 5 states. [2020-10-27 23:27:49,367 WARN L193 SmtUtils]: Spent 606.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2020-10-27 23:27:52,192 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification that was a NOOP. DAG size: 282 [2020-10-27 23:27:52,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:27:52,517 INFO L93 Difference]: Finished difference Result 7016 states and 11871 transitions. [2020-10-27 23:27:52,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 23:27:52,517 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 107 [2020-10-27 23:27:52,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:27:52,547 INFO L225 Difference]: With dead ends: 7016 [2020-10-27 23:27:52,548 INFO L226 Difference]: Without dead ends: 5344 [2020-10-27 23:27:52,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:27:52,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5344 states. [2020-10-27 23:27:52,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5344 to 3655. [2020-10-27 23:27:52,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3655 states. [2020-10-27 23:27:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3655 states to 3655 states and 6177 transitions. [2020-10-27 23:27:52,869 INFO L78 Accepts]: Start accepts. Automaton has 3655 states and 6177 transitions. Word has length 107 [2020-10-27 23:27:52,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:27:52,870 INFO L481 AbstractCegarLoop]: Abstraction has 3655 states and 6177 transitions. [2020-10-27 23:27:52,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:27:52,870 INFO L276 IsEmpty]: Start isEmpty. Operand 3655 states and 6177 transitions. [2020-10-27 23:27:52,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 23:27:52,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:27:52,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:27:52,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:27:52,874 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:27:52,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:27:52,875 INFO L82 PathProgramCache]: Analyzing trace with hash 120043810, now seen corresponding path program 1 times [2020-10-27 23:27:52,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:27:52,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134152567] [2020-10-27 23:27:52,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:27:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:52,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:52,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:53,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:53,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:53,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:53,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:54,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:57,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:57,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 23:27:57,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:27:57,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 23:27:57,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:57,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:27:57,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-27 23:27:57,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 23:27:57,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:58,717 WARN L193 SmtUtils]: Spent 669.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-27 23:27:58,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:27:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:27:58,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:27:58,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:27:58,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:27:58,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:27:58,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 23:27:58,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:27:58,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:27:58,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:27:58,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:27:58,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:27:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:27:58,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134152567] [2020-10-27 23:27:58,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:27:58,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:27:58,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078972784] [2020-10-27 23:27:58,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:27:58,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:27:58,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:27:58,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:27:58,801 INFO L87 Difference]: Start difference. First operand 3655 states and 6177 transitions. Second operand 4 states. [2020-10-27 23:27:59,468 WARN L193 SmtUtils]: Spent 610.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2020-10-27 23:28:02,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:28:02,246 INFO L93 Difference]: Finished difference Result 9641 states and 16292 transitions. [2020-10-27 23:28:02,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:28:02,247 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2020-10-27 23:28:02,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:28:02,279 INFO L225 Difference]: With dead ends: 9641 [2020-10-27 23:28:02,279 INFO L226 Difference]: Without dead ends: 6212 [2020-10-27 23:28:02,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:28:02,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6212 states. [2020-10-27 23:28:02,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6212 to 6209. [2020-10-27 23:28:02,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6209 states. [2020-10-27 23:28:02,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6209 states to 6209 states and 10459 transitions. [2020-10-27 23:28:02,792 INFO L78 Accepts]: Start accepts. Automaton has 6209 states and 10459 transitions. Word has length 108 [2020-10-27 23:28:02,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:28:02,793 INFO L481 AbstractCegarLoop]: Abstraction has 6209 states and 10459 transitions. [2020-10-27 23:28:02,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:28:02,793 INFO L276 IsEmpty]: Start isEmpty. Operand 6209 states and 10459 transitions. [2020-10-27 23:28:02,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 23:28:02,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:28:02,795 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:28:02,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:28:02,796 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:28:02,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:28:02,797 INFO L82 PathProgramCache]: Analyzing trace with hash 407371776, now seen corresponding path program 1 times [2020-10-27 23:28:02,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:28:02,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930839974] [2020-10-27 23:28:02,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:28:02,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:02,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:02,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:03,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:03,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:03,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:03,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:03,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:07,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:07,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 23:28:07,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:28:07,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:28:07,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:07,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:28:07,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-27 23:28:07,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 23:28:07,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:08,475 WARN L193 SmtUtils]: Spent 569.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-27 23:28:08,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:28:08,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:08,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:08,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:08,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:28:08,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:28:08,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 23:28:08,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:08,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:28:08,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:28:08,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:28:08,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:28:08,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930839974] [2020-10-27 23:28:08,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:28:08,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:28:08,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564605840] [2020-10-27 23:28:08,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:28:08,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:28:08,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:28:08,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:28:08,536 INFO L87 Difference]: Start difference. First operand 6209 states and 10459 transitions. Second operand 4 states. [2020-10-27 23:28:09,227 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2020-10-27 23:28:12,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:28:12,036 INFO L93 Difference]: Finished difference Result 16664 states and 28073 transitions. [2020-10-27 23:28:12,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:28:12,037 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2020-10-27 23:28:12,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:28:12,090 INFO L225 Difference]: With dead ends: 16664 [2020-10-27 23:28:12,090 INFO L226 Difference]: Without dead ends: 10699 [2020-10-27 23:28:12,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:28:12,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10699 states. [2020-10-27 23:28:12,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10699 to 10696. [2020-10-27 23:28:12,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10696 states. [2020-10-27 23:28:12,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10696 states to 10696 states and 17958 transitions. [2020-10-27 23:28:12,903 INFO L78 Accepts]: Start accepts. Automaton has 10696 states and 17958 transitions. Word has length 108 [2020-10-27 23:28:12,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:28:12,903 INFO L481 AbstractCegarLoop]: Abstraction has 10696 states and 17958 transitions. [2020-10-27 23:28:12,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:28:12,903 INFO L276 IsEmpty]: Start isEmpty. Operand 10696 states and 17958 transitions. [2020-10-27 23:28:12,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 23:28:12,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:28:12,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:28:12,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:28:12,906 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:28:12,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:28:12,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1042585368, now seen corresponding path program 1 times [2020-10-27 23:28:12,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:28:12,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992359742] [2020-10-27 23:28:12,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:28:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:12,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:13,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:13,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:13,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:13,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:13,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:17,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:17,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 23:28:17,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:28:17,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:28:17,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:17,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:28:17,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-27 23:28:17,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 23:28:17,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:18,623 WARN L193 SmtUtils]: Spent 610.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-27 23:28:18,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:28:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:18,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:18,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:18,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:28:18,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:28:18,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 23:28:18,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:18,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:28:18,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:28:18,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:28:18,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:28:18,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992359742] [2020-10-27 23:28:18,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:28:18,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:28:18,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070181686] [2020-10-27 23:28:18,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:28:18,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:28:18,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:28:18,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:28:18,684 INFO L87 Difference]: Start difference. First operand 10696 states and 17958 transitions. Second operand 5 states. [2020-10-27 23:28:19,387 WARN L193 SmtUtils]: Spent 634.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2020-10-27 23:28:21,857 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification that was a NOOP. DAG size: 282 [2020-10-27 23:28:23,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:28:23,526 INFO L93 Difference]: Finished difference Result 42025 states and 70572 transitions. [2020-10-27 23:28:23,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 23:28:23,527 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-10-27 23:28:23,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:28:23,618 INFO L225 Difference]: With dead ends: 42025 [2020-10-27 23:28:23,619 INFO L226 Difference]: Without dead ends: 31582 [2020-10-27 23:28:23,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:28:23,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31582 states. [2020-10-27 23:28:25,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31582 to 21024. [2020-10-27 23:28:25,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21024 states. [2020-10-27 23:28:25,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21024 states to 21024 states and 35206 transitions. [2020-10-27 23:28:25,071 INFO L78 Accepts]: Start accepts. Automaton has 21024 states and 35206 transitions. Word has length 108 [2020-10-27 23:28:25,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:28:25,072 INFO L481 AbstractCegarLoop]: Abstraction has 21024 states and 35206 transitions. [2020-10-27 23:28:25,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:28:25,072 INFO L276 IsEmpty]: Start isEmpty. Operand 21024 states and 35206 transitions. [2020-10-27 23:28:25,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 23:28:25,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:28:25,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:28:25,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:28:25,074 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:28:25,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:28:25,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1951154230, now seen corresponding path program 1 times [2020-10-27 23:28:25,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:28:25,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027998602] [2020-10-27 23:28:25,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:28:25,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:25,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:25,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:25,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:25,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:25,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:25,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:25,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:30,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:30,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 23:28:30,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:28:30,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 23:28:30,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:30,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:28:30,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-27 23:28:30,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 23:28:30,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:30,809 WARN L193 SmtUtils]: Spent 610.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-27 23:28:30,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:28:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:30,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:30,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:30,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:28:30,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:28:30,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:28:30,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:30,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:28:30,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:28:30,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:28:30,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:30,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:28:30,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027998602] [2020-10-27 23:28:30,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:28:30,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:28:30,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040295811] [2020-10-27 23:28:30,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:28:30,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:28:30,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:28:30,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:28:30,856 INFO L87 Difference]: Start difference. First operand 21024 states and 35206 transitions. Second operand 4 states. [2020-10-27 23:28:31,568 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2020-10-27 23:28:35,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:28:35,487 INFO L93 Difference]: Finished difference Result 56854 states and 95146 transitions. [2020-10-27 23:28:35,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:28:35,488 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2020-10-27 23:28:35,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:28:35,578 INFO L225 Difference]: With dead ends: 56854 [2020-10-27 23:28:35,578 INFO L226 Difference]: Without dead ends: 36075 [2020-10-27 23:28:35,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:28:35,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36075 states. [2020-10-27 23:28:37,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36075 to 36008. [2020-10-27 23:28:37,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36008 states. [2020-10-27 23:28:37,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36008 states to 36008 states and 60015 transitions. [2020-10-27 23:28:37,970 INFO L78 Accepts]: Start accepts. Automaton has 36008 states and 60015 transitions. Word has length 108 [2020-10-27 23:28:37,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:28:37,970 INFO L481 AbstractCegarLoop]: Abstraction has 36008 states and 60015 transitions. [2020-10-27 23:28:37,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:28:37,970 INFO L276 IsEmpty]: Start isEmpty. Operand 36008 states and 60015 transitions. [2020-10-27 23:28:37,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 23:28:37,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:28:37,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:28:37,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:28:37,973 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:28:37,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:28:37,973 INFO L82 PathProgramCache]: Analyzing trace with hash 291418132, now seen corresponding path program 1 times [2020-10-27 23:28:37,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:28:37,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459900763] [2020-10-27 23:28:37,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:28:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:38,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:38,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:38,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:38,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:38,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:38,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:39,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:43,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:43,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 23:28:43,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 23:28:43,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 23:28:43,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:43,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:28:43,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-27 23:28:43,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 23:28:43,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:43,667 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-27 23:28:43,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:28:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:43,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:43,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:43,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:28:43,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:28:43,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:28:43,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:43,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:28:43,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:28:43,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:28:43,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:43,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:28:43,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459900763] [2020-10-27 23:28:43,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:28:43,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:28:43,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665018511] [2020-10-27 23:28:43,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:28:43,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:28:43,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:28:43,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:28:43,717 INFO L87 Difference]: Start difference. First operand 36008 states and 60015 transitions. Second operand 4 states. [2020-10-27 23:28:44,418 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification that was a NOOP. DAG size: 284 [2020-10-27 23:28:49,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:28:49,920 INFO L93 Difference]: Finished difference Result 96206 states and 160115 transitions. [2020-10-27 23:28:49,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:28:49,921 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2020-10-27 23:28:49,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:28:50,081 INFO L225 Difference]: With dead ends: 96206 [2020-10-27 23:28:50,082 INFO L226 Difference]: Without dead ends: 60379 [2020-10-27 23:28:50,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:28:50,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60379 states. [2020-10-27 23:28:54,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60379 to 60376. [2020-10-27 23:28:54,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60376 states. [2020-10-27 23:28:54,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60376 states to 60376 states and 99951 transitions. [2020-10-27 23:28:54,892 INFO L78 Accepts]: Start accepts. Automaton has 60376 states and 99951 transitions. Word has length 108 [2020-10-27 23:28:54,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:28:54,892 INFO L481 AbstractCegarLoop]: Abstraction has 60376 states and 99951 transitions. [2020-10-27 23:28:54,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:28:54,892 INFO L276 IsEmpty]: Start isEmpty. Operand 60376 states and 99951 transitions. [2020-10-27 23:28:54,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 23:28:54,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:28:54,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:28:54,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:28:54,894 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:28:54,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:28:54,895 INFO L82 PathProgramCache]: Analyzing trace with hash -160587208, now seen corresponding path program 1 times [2020-10-27 23:28:54,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:28:54,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278219679] [2020-10-27 23:28:54,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:28:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:54,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:54,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:55,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:55,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:56,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:56,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:59,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:59,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 23:28:59,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:28:59,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4391 [2020-10-27 23:28:59,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:59,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:28:59,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-27 23:28:59,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 23:28:59,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:59,953 WARN L193 SmtUtils]: Spent 559.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-27 23:28:59,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:28:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:28:59,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:28:59,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:28:59,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:28:59,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:28:59,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 23:28:59,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:28:59,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:28:59,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:28:59,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:28:59,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:28:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:28:59,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278219679] [2020-10-27 23:28:59,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:28:59,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:28:59,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704575681] [2020-10-27 23:28:59,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:28:59,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:28:59,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:28:59,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:28:59,991 INFO L87 Difference]: Start difference. First operand 60376 states and 99951 transitions. Second operand 4 states. [2020-10-27 23:29:02,042 WARN L193 SmtUtils]: Spent 604.00 ms on a formula simplification that was a NOOP. DAG size: 282 [2020-10-27 23:29:08,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:29:08,805 INFO L93 Difference]: Finished difference Result 155166 states and 255379 transitions. [2020-10-27 23:29:08,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:29:08,805 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 110 [2020-10-27 23:29:08,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:29:09,050 INFO L225 Difference]: With dead ends: 155166 [2020-10-27 23:29:09,050 INFO L226 Difference]: Without dead ends: 94971 [2020-10-27 23:29:09,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:29:09,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94971 states. [2020-10-27 23:29:15,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94971 to 94968. [2020-10-27 23:29:15,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94968 states. [2020-10-27 23:29:15,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94968 states to 94968 states and 153807 transitions. [2020-10-27 23:29:15,821 INFO L78 Accepts]: Start accepts. Automaton has 94968 states and 153807 transitions. Word has length 110 [2020-10-27 23:29:15,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:29:15,821 INFO L481 AbstractCegarLoop]: Abstraction has 94968 states and 153807 transitions. [2020-10-27 23:29:15,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:29:15,821 INFO L276 IsEmpty]: Start isEmpty. Operand 94968 states and 153807 transitions. [2020-10-27 23:29:15,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-27 23:29:15,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:29:15,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:29:15,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:29:15,823 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:29:15,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:29:15,824 INFO L82 PathProgramCache]: Analyzing trace with hash -510804103, now seen corresponding path program 1 times [2020-10-27 23:29:15,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:29:15,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134935985] [2020-10-27 23:29:15,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:29:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:29:15,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:15,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:16,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:16,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:16,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:16,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:17,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:29:17,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-27 23:29:17,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 23:29:17,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1428 [2020-10-27 23:29:17,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:29:17,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:29:17,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 23:29:17,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 23:29:17,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:29:17,947 WARN L193 SmtUtils]: Spent 612.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-27 23:29:17,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:29:17,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:29:17,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:17,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:29:17,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:29:17,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:29:17,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 23:29:17,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:29:17,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:29:17,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:29:17,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:29:17,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:29:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:29:17,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134935985] [2020-10-27 23:29:18,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:29:18,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:29:18,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840405846] [2020-10-27 23:29:18,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:29:18,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:29:18,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:29:18,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:29:18,004 INFO L87 Difference]: Start difference. First operand 94968 states and 153807 transitions. Second operand 4 states. [2020-10-27 23:29:18,591 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification that was a NOOP. DAG size: 282 [2020-10-27 23:29:28,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:29:28,116 INFO L93 Difference]: Finished difference Result 215180 states and 348019 transitions. [2020-10-27 23:29:28,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:29:28,116 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2020-10-27 23:29:28,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:29:28,489 INFO L225 Difference]: With dead ends: 215180 [2020-10-27 23:29:28,489 INFO L226 Difference]: Without dead ends: 120393 [2020-10-27 23:29:28,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:29:28,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120393 states. [2020-10-27 23:29:36,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120393 to 120390. [2020-10-27 23:29:36,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120390 states. [2020-10-27 23:29:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120390 states to 120390 states and 194127 transitions. [2020-10-27 23:29:36,858 INFO L78 Accepts]: Start accepts. Automaton has 120390 states and 194127 transitions. Word has length 111 [2020-10-27 23:29:36,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:29:36,858 INFO L481 AbstractCegarLoop]: Abstraction has 120390 states and 194127 transitions. [2020-10-27 23:29:36,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:29:36,859 INFO L276 IsEmpty]: Start isEmpty. Operand 120390 states and 194127 transitions. [2020-10-27 23:29:36,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 23:29:36,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:29:36,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:29:36,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:29:36,860 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:29:36,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:29:36,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1639075617, now seen corresponding path program 1 times [2020-10-27 23:29:36,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:29:36,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883380473] [2020-10-27 23:29:36,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:29:36,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:29:36,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:36,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:37,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:37,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:37,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:37,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:41,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:41,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:41,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:29:41,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 23:29:41,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:29:41,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 23:29:41,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:29:41,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:29:41,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-27 23:29:41,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 23:29:41,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:29:42,545 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-27 23:29:42,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:29:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:29:42,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:29:42,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:29:42,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:29:42,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:29:42,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:29:42,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:29:42,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:29:42,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:29:42,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:29:42,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:29:42,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:29:42,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883380473] [2020-10-27 23:29:42,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:29:42,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:29:42,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095117328] [2020-10-27 23:29:42,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:29:42,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:29:42,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:29:42,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:29:42,589 INFO L87 Difference]: Start difference. First operand 120390 states and 194127 transitions. Second operand 4 states. [2020-10-27 23:29:43,246 WARN L193 SmtUtils]: Spent 614.00 ms on a formula simplification that was a NOOP. DAG size: 282 [2020-10-27 23:29:54,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:29:54,339 INFO L93 Difference]: Finished difference Result 272580 states and 438965 transitions. [2020-10-27 23:29:54,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:29:54,340 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 114 [2020-10-27 23:29:54,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:29:54,778 INFO L225 Difference]: With dead ends: 272580 [2020-10-27 23:29:54,779 INFO L226 Difference]: Without dead ends: 152461 [2020-10-27 23:29:54,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:29:55,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152461 states. [2020-10-27 23:30:04,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152461 to 152458. [2020-10-27 23:30:04,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152458 states. [2020-10-27 23:30:05,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152458 states to 152458 states and 244795 transitions. [2020-10-27 23:30:05,291 INFO L78 Accepts]: Start accepts. Automaton has 152458 states and 244795 transitions. Word has length 114 [2020-10-27 23:30:05,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:30:05,292 INFO L481 AbstractCegarLoop]: Abstraction has 152458 states and 244795 transitions. [2020-10-27 23:30:05,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:30:05,292 INFO L276 IsEmpty]: Start isEmpty. Operand 152458 states and 244795 transitions. [2020-10-27 23:30:05,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 23:30:05,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:30:05,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 23:30:05,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:30:05,294 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:30:05,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:30:05,294 INFO L82 PathProgramCache]: Analyzing trace with hash 2042657503, now seen corresponding path program 1 times [2020-10-27 23:30:05,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:30:05,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772079677] [2020-10-27 23:30:05,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:30:05,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:30:05,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:05,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:05,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:05,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:06,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:06,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:06,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:06,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:10,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:30:10,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-27 23:30:10,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 23:30:10,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 23:30:10,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:30:10,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:30:10,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-27 23:30:10,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 23:30:10,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:30:10,999 WARN L193 SmtUtils]: Spent 606.00 ms on a formula simplification that was a NOOP. DAG size: 280 [2020-10-27 23:30:11,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:30:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:30:11,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:30:11,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:30:11,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:30:11,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:30:11,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:30:11,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:30:11,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:30:11,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:30:11,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:30:11,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:30:11,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:30:11,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772079677] [2020-10-27 23:30:11,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:30:11,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:30:11,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093611618] [2020-10-27 23:30:11,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:30:11,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:30:11,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:30:11,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:30:11,041 INFO L87 Difference]: Start difference. First operand 152458 states and 244795 transitions. Second operand 4 states. [2020-10-27 23:30:11,732 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 282 [2020-10-27 23:30:25,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:30:25,884 INFO L93 Difference]: Finished difference Result 345279 states and 553707 transitions. [2020-10-27 23:30:25,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:30:25,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 117 [2020-10-27 23:30:25,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:30:26,454 INFO L225 Difference]: With dead ends: 345279 [2020-10-27 23:30:26,454 INFO L226 Difference]: Without dead ends: 193056 [2020-10-27 23:30:26,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:30:26,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193056 states.