/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.3.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:23:23,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:23:23,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:23:23,624 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:23:23,625 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:23:23,626 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:23:23,628 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:23:23,631 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:23:23,633 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:23:23,635 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:23:23,636 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:23:23,638 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:23:23,638 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:23:23,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:23:23,641 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:23:23,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:23:23,644 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:23:23,645 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:23:23,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:23:23,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:23:23,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:23:23,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:23:23,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:23:23,659 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:23:23,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:23:23,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:23:23,671 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:23:23,675 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:23:23,685 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:23:23,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:23:23,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:23:23,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:23:23,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:23:23,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:23:23,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:23:23,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:23:23,694 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:23:23,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:23:23,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:23:23,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:23:23,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:23:23,698 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 23:23:23,757 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:23:23,757 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:23:23,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:23:23,762 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:23:23,763 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:23:23,763 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:23:23,763 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:23:23,763 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:23:23,763 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:23:23,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:23:23,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:23:23,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:23:23,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:23:23,766 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:23:23,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:23:23,766 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:23:23,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:23:23,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:23:23,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:23:23,767 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:23:23,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:23:23,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:23:23,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:23:23,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:23:23,768 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:23:23,768 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:23:23,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:23:23,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:23:23,769 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:23:23,769 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:23:24,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:23:24,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:23:24,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:23:24,265 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:23:24,266 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:23:24,267 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 23:23:24,362 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f4f039716/d968ea06bcb24efb81e41d866de1f088/FLAG14e246f8d [2020-10-27 23:23:25,197 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:23:25,198 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 23:23:25,234 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f4f039716/d968ea06bcb24efb81e41d866de1f088/FLAG14e246f8d [2020-10-27 23:23:25,431 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f4f039716/d968ea06bcb24efb81e41d866de1f088 [2020-10-27 23:23:25,437 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:23:25,446 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:23:25,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:23:25,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:23:25,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:23:25,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:23:25" (1/1) ... [2020-10-27 23:23:25,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fdbbe7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:23:25, skipping insertion in model container [2020-10-27 23:23:25,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:23:25" (1/1) ... [2020-10-27 23:23:25,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:23:25,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:23:26,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:23:26,212 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 23:23:26,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:23:26,634 INFO L208 MainTranslator]: Completed translation [2020-10-27 23:23:26,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:23:26 WrapperNode [2020-10-27 23:23:26,634 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 23:23:26,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 23:23:26,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 23:23:26,636 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 23:23:26,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:23:26" (1/1) ... [2020-10-27 23:23:26,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:23:26" (1/1) ... [2020-10-27 23:23:26,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:23:26" (1/1) ... [2020-10-27 23:23:26,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:23:26" (1/1) ... [2020-10-27 23:23:26,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:23:26" (1/1) ... [2020-10-27 23:23:26,770 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:23:26" (1/1) ... [2020-10-27 23:23:26,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:23:26" (1/1) ... [2020-10-27 23:23:26,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 23:23:26,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 23:23:26,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 23:23:26,794 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 23:23:26,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:23:26" (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 23:23:26,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 23:23:26,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 23:23:26,894 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 23:23:26,894 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 23:23:26,894 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 23:23:26,894 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 23:23:26,894 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 23:23:26,895 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 23:23:26,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 23:23:26,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 23:23:26,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 23:23:26,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 23:23:26,895 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 23:23:26,896 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 23:23:26,896 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 23:23:26,896 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 23:23:26,896 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 23:23:26,896 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 23:23:26,896 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 23:23:26,897 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 23:23:26,897 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 23:23:26,897 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 23:23:26,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 23:23:26,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 23:23:26,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 23:23:26,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 23:23:26,898 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 23:23:26,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 23:23:28,904 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 23:23:28,904 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 23:23:28,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:23:28 BoogieIcfgContainer [2020-10-27 23:23:28,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 23:23:28,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 23:23:28,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 23:23:28,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 23:23:28,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:23:25" (1/3) ... [2020-10-27 23:23:28,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23327768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:23:28, skipping insertion in model container [2020-10-27 23:23:28,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:23:26" (2/3) ... [2020-10-27 23:23:28,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23327768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 11:23:28, skipping insertion in model container [2020-10-27 23:23:28,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 11:23:28" (3/3) ... [2020-10-27 23:23:28,916 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 23:23:28,931 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 23:23:28,937 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 23:23:28,952 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 23:23:28,985 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 23:23:28,985 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 23:23:28,985 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 23:23:28,985 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 23:23:28,985 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 23:23:28,986 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 23:23:28,986 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 23:23:28,986 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 23:23:29,014 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states. [2020-10-27 23:23:29,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-27 23:23:29,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:23:29,037 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, 1, 1, 1, 1, 1, 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 23:23:29,037 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:23:29,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:23:29,051 INFO L82 PathProgramCache]: Analyzing trace with hash -538195825, now seen corresponding path program 1 times [2020-10-27 23:23:29,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:23:29,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106720905] [2020-10-27 23:23:29,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:23:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:29,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:29,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:30,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:30,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:30,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:30,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:30,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:30,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:31,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:31,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:32,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:32,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:34,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:34,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-27 23:23:34,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:23:34,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:23:34,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:34,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:23:34,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-27 23:23:34,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 23:23:34,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 23:23:35,114 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 23:23:35,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:23:35,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:35,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:35,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:35,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:23:35,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:23:35,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 23:23:35,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:35,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:23:35,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:23:35,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:23:35,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:23:35,236 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 23:23:35,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106720905] [2020-10-27 23:23:35,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:23:35,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:23:35,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314116063] [2020-10-27 23:23:35,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:23:35,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:23:35,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:23:35,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:23:35,264 INFO L87 Difference]: Start difference. First operand 397 states. Second operand 4 states. [2020-10-27 23:23:35,829 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-27 23:23:38,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:23:38,495 INFO L93 Difference]: Finished difference Result 706 states and 1250 transitions. [2020-10-27 23:23:38,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:23:38,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-10-27 23:23:38,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:23:38,525 INFO L225 Difference]: With dead ends: 706 [2020-10-27 23:23:38,525 INFO L226 Difference]: Without dead ends: 557 [2020-10-27 23:23:38,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:23:38,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2020-10-27 23:23:38,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 554. [2020-10-27 23:23:38,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2020-10-27 23:23:38,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 813 transitions. [2020-10-27 23:23:38,710 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 813 transitions. Word has length 146 [2020-10-27 23:23:38,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:23:38,714 INFO L481 AbstractCegarLoop]: Abstraction has 554 states and 813 transitions. [2020-10-27 23:23:38,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:23:38,714 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 813 transitions. [2020-10-27 23:23:38,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-27 23:23:38,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:23:38,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:23:38,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 23:23:38,730 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:23:38,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:23:38,732 INFO L82 PathProgramCache]: Analyzing trace with hash -84231047, now seen corresponding path program 1 times [2020-10-27 23:23:38,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:23:38,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682055432] [2020-10-27 23:23:38,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:23:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:38,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:39,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:39,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:39,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:39,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:39,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:39,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:39,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:39,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:40,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:40,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:42,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:43,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:43,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:43,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:43,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-27 23:23:43,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:23:43,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-27 23:23:43,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:43,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:23:43,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:23:43,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 23:23:43,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:23:44,614 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 23:23:44,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:23:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:44,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:44,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:44,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:23:44,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:23:44,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:23:44,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:44,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:23:44,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:23:44,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:23:44,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:23:44,721 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 23:23:44,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682055432] [2020-10-27 23:23:44,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:23:44,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:23:44,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264634706] [2020-10-27 23:23:44,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:23:44,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:23:44,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:23:44,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:23:44,739 INFO L87 Difference]: Start difference. First operand 554 states and 813 transitions. Second operand 5 states. [2020-10-27 23:23:47,975 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 23:23:49,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:23:49,437 INFO L93 Difference]: Finished difference Result 1537 states and 2259 transitions. [2020-10-27 23:23:49,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:23:49,438 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-10-27 23:23:49,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:23:49,446 INFO L225 Difference]: With dead ends: 1537 [2020-10-27 23:23:49,446 INFO L226 Difference]: Without dead ends: 1066 [2020-10-27 23:23:49,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:23:49,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-10-27 23:23:49,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1049. [2020-10-27 23:23:49,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1049 states. [2020-10-27 23:23:49,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1529 transitions. [2020-10-27 23:23:49,552 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1529 transitions. Word has length 146 [2020-10-27 23:23:49,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:23:49,552 INFO L481 AbstractCegarLoop]: Abstraction has 1049 states and 1529 transitions. [2020-10-27 23:23:49,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:23:49,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1529 transitions. [2020-10-27 23:23:49,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-27 23:23:49,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:23:49,557 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, 1, 1, 1, 1, 1, 1, 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 23:23:49,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 23:23:49,558 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:23:49,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:23:49,561 INFO L82 PathProgramCache]: Analyzing trace with hash 723428627, now seen corresponding path program 1 times [2020-10-27 23:23:49,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:23:49,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568466678] [2020-10-27 23:23:49,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:23:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:49,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:49,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:49,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:49,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:50,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:50,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:50,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:50,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:50,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:50,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:50,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:53,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:53,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:53,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:54,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:54,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-27 23:23:54,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:23:54,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-27 23:23:54,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:54,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:23:54,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 23:23:54,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 23:23:54,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:23:55,099 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 23:23:55,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:23:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:55,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:55,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:23:55,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:23:55,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:23:55,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:23:55,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:23:55,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:23:55,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:23:55,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:23:55,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:23:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:23:55,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568466678] [2020-10-27 23:23:55,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:23:55,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:23:55,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868741424] [2020-10-27 23:23:55,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:23:55,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:23:55,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:23:55,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:23:55,165 INFO L87 Difference]: Start difference. First operand 1049 states and 1529 transitions. Second operand 4 states. [2020-10-27 23:23:57,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:23:57,434 INFO L93 Difference]: Finished difference Result 3095 states and 4506 transitions. [2020-10-27 23:23:57,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 23:23:57,435 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 147 [2020-10-27 23:23:57,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:23:57,447 INFO L225 Difference]: With dead ends: 3095 [2020-10-27 23:23:57,447 INFO L226 Difference]: Without dead ends: 2074 [2020-10-27 23:23:57,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:23:57,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2020-10-27 23:23:57,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1055. [2020-10-27 23:23:57,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1055 states. [2020-10-27 23:23:57,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1537 transitions. [2020-10-27 23:23:57,542 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1537 transitions. Word has length 147 [2020-10-27 23:23:57,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:23:57,546 INFO L481 AbstractCegarLoop]: Abstraction has 1055 states and 1537 transitions. [2020-10-27 23:23:57,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:23:57,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1537 transitions. [2020-10-27 23:23:57,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-27 23:23:57,553 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:23:57,553 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, 1, 1, 1, 1, 1, 1, 1, 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 23:23:57,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 23:23:57,553 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:23:57,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:23:57,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1712417053, now seen corresponding path program 1 times [2020-10-27 23:23:57,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:23:57,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669834810] [2020-10-27 23:23:57,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:23:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:23:57,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:57,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:57,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:57,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:57,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:57,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:57,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:58,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:58,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:58,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:58,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:58,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:23:59,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:02,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:02,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-27 23:24:02,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:24:02,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 23:24:02,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:02,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:24:02,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 23:24:02,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 23:24:02,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 23:24:03,095 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 23:24:03,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:24:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:03,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:03,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:03,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:24:03,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:24:03,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 23:24:03,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:03,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:24:03,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:24:03,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:24:03,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:24:03,255 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 23:24:03,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669834810] [2020-10-27 23:24:03,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:24:03,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:24:03,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232292039] [2020-10-27 23:24:03,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:24:03,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:24:03,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:24:03,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:24:03,260 INFO L87 Difference]: Start difference. First operand 1055 states and 1537 transitions. Second operand 4 states. [2020-10-27 23:24:06,151 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-10-27 23:24:07,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:24:07,385 INFO L93 Difference]: Finished difference Result 2943 states and 4291 transitions. [2020-10-27 23:24:07,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:24:07,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 148 [2020-10-27 23:24:07,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:24:07,397 INFO L225 Difference]: With dead ends: 2943 [2020-10-27 23:24:07,398 INFO L226 Difference]: Without dead ends: 2020 [2020-10-27 23:24:07,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:24:07,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2020-10-27 23:24:07,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 2000. [2020-10-27 23:24:07,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2000 states. [2020-10-27 23:24:07,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 2881 transitions. [2020-10-27 23:24:07,527 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 2881 transitions. Word has length 148 [2020-10-27 23:24:07,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:24:07,528 INFO L481 AbstractCegarLoop]: Abstraction has 2000 states and 2881 transitions. [2020-10-27 23:24:07,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:24:07,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 2881 transitions. [2020-10-27 23:24:07,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-27 23:24:07,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:24:07,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:24:07,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 23:24:07,533 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:24:07,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:24:07,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1991094080, now seen corresponding path program 1 times [2020-10-27 23:24:07,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:24:07,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472779310] [2020-10-27 23:24:07,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:24:07,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:07,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:07,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:07,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:07,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:08,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:08,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:08,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:08,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:08,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:08,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:09,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:09,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:09,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:10,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:10,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:10,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:10,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:10,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:12,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:12,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-27 23:24:12,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-27 23:24:12,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 23:24:12,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:12,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:24:12,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 23:24:12,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 23:24:12,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:13,207 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 23:24:13,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:24:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:13,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:13,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:13,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:24:13,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:24:13,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 23:24:13,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:13,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:24:13,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:24:13,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:24:13,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 23:24:13,312 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 23:24:13,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472779310] [2020-10-27 23:24:13,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:24:13,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:24:13,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9494427] [2020-10-27 23:24:13,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:24:13,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:24:13,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:24:13,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:24:13,315 INFO L87 Difference]: Start difference. First operand 2000 states and 2881 transitions. Second operand 5 states. [2020-10-27 23:24:15,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:24:15,346 INFO L93 Difference]: Finished difference Result 3417 states and 4932 transitions. [2020-10-27 23:24:15,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:24:15,347 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2020-10-27 23:24:15,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:24:15,356 INFO L225 Difference]: With dead ends: 3417 [2020-10-27 23:24:15,357 INFO L226 Difference]: Without dead ends: 1541 [2020-10-27 23:24:15,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:24:15,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2020-10-27 23:24:15,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1535. [2020-10-27 23:24:15,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1535 states. [2020-10-27 23:24:15,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 2200 transitions. [2020-10-27 23:24:15,463 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 2200 transitions. Word has length 148 [2020-10-27 23:24:15,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:24:15,463 INFO L481 AbstractCegarLoop]: Abstraction has 1535 states and 2200 transitions. [2020-10-27 23:24:15,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:24:15,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 2200 transitions. [2020-10-27 23:24:15,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-27 23:24:15,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:24:15,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:24:15,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 23:24:15,468 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:24:15,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:24:15,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1045551400, now seen corresponding path program 1 times [2020-10-27 23:24:15,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:24:15,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658027820] [2020-10-27 23:24:15,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:24:15,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:15,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:15,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:15,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:15,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:15,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:16,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:16,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:16,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:17,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:17,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:17,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:17,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:18,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:20,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:20,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:20,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:20,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-27 23:24:20,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:24:20,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 23:24:20,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:20,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:24:20,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:24:20,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 23:24:20,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:21,072 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 23:24:21,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:24:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:21,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:21,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:21,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:24:21,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:24:21,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 23:24:21,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:21,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:24:21,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:24:21,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:24:21,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:21,185 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 23:24:21,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658027820] [2020-10-27 23:24:21,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:24:21,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:24:21,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477593850] [2020-10-27 23:24:21,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:24:21,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:24:21,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:24:21,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:24:21,189 INFO L87 Difference]: Start difference. First operand 1535 states and 2200 transitions. Second operand 5 states. [2020-10-27 23:24:24,211 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 23:24:25,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:24:25,685 INFO L93 Difference]: Finished difference Result 2475 states and 3551 transitions. [2020-10-27 23:24:25,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:24:25,692 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 154 [2020-10-27 23:24:25,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:24:25,700 INFO L225 Difference]: With dead ends: 2475 [2020-10-27 23:24:25,701 INFO L226 Difference]: Without dead ends: 1618 [2020-10-27 23:24:25,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:24:25,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2020-10-27 23:24:25,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1550. [2020-10-27 23:24:25,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1550 states. [2020-10-27 23:24:25,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 2225 transitions. [2020-10-27 23:24:25,820 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 2225 transitions. Word has length 154 [2020-10-27 23:24:25,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:24:25,820 INFO L481 AbstractCegarLoop]: Abstraction has 1550 states and 2225 transitions. [2020-10-27 23:24:25,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:24:25,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 2225 transitions. [2020-10-27 23:24:25,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-27 23:24:25,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:24:25,824 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:24:25,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 23:24:25,825 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:24:25,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:24:25,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1030875136, now seen corresponding path program 1 times [2020-10-27 23:24:25,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:24:25,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946456355] [2020-10-27 23:24:25,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:24:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:25,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:25,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:25,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:26,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:26,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:26,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:26,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:26,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:26,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:26,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:28,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:30,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:30,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-27 23:24:30,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 23:24:30,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:24:30,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:30,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:24:30,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 23:24:30,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 23:24:30,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:31,268 WARN L193 SmtUtils]: Spent 363.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 23:24:31,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:24:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:31,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:31,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:31,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:24:31,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:24:31,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:24:31,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:31,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:24:31,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:24:31,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:24:31,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:31,324 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 23:24:31,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946456355] [2020-10-27 23:24:31,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:24:31,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:24:31,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149903797] [2020-10-27 23:24:31,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:24:31,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:24:31,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:24:31,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:24:31,327 INFO L87 Difference]: Start difference. First operand 1550 states and 2225 transitions. Second operand 4 states. [2020-10-27 23:24:34,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:24:34,976 INFO L93 Difference]: Finished difference Result 4597 states and 6594 transitions. [2020-10-27 23:24:34,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 23:24:34,976 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 155 [2020-10-27 23:24:34,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:24:34,993 INFO L225 Difference]: With dead ends: 4597 [2020-10-27 23:24:34,993 INFO L226 Difference]: Without dead ends: 3078 [2020-10-27 23:24:34,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:24:35,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3078 states. [2020-10-27 23:24:35,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3078 to 1553. [2020-10-27 23:24:35,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1553 states. [2020-10-27 23:24:35,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 2229 transitions. [2020-10-27 23:24:35,142 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 2229 transitions. Word has length 155 [2020-10-27 23:24:35,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:24:35,143 INFO L481 AbstractCegarLoop]: Abstraction has 1553 states and 2229 transitions. [2020-10-27 23:24:35,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:24:35,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 2229 transitions. [2020-10-27 23:24:35,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-27 23:24:35,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:24:35,147 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:24:35,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 23:24:35,147 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:24:35,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:24:35,148 INFO L82 PathProgramCache]: Analyzing trace with hash 871152009, now seen corresponding path program 1 times [2020-10-27 23:24:35,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:24:35,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233632315] [2020-10-27 23:24:35,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:24:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:35,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:35,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:35,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:35,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:35,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:35,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:36,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:36,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:36,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:36,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:36,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:37,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:37,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:40,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:40,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-27 23:24:40,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:24:40,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-27 23:24:40,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:40,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:24:40,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 23:24:40,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 23:24:40,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:40,694 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 23:24:40,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:24:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:40,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:40,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:40,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:24:40,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:24:40,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:24:40,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:40,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:24:40,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:24:40,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:24:40,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:40,750 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 23:24:40,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233632315] [2020-10-27 23:24:40,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:24:40,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:24:40,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627831756] [2020-10-27 23:24:40,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:24:40,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:24:40,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:24:40,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:24:40,753 INFO L87 Difference]: Start difference. First operand 1553 states and 2229 transitions. Second operand 5 states. [2020-10-27 23:24:42,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:24:42,818 INFO L93 Difference]: Finished difference Result 3075 states and 4410 transitions. [2020-10-27 23:24:42,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:24:42,819 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2020-10-27 23:24:42,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:24:42,827 INFO L225 Difference]: With dead ends: 3075 [2020-10-27 23:24:42,827 INFO L226 Difference]: Without dead ends: 1548 [2020-10-27 23:24:42,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:24:42,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1548 states. [2020-10-27 23:24:42,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1548 to 1545. [2020-10-27 23:24:42,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1545 states. [2020-10-27 23:24:42,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 2213 transitions. [2020-10-27 23:24:42,957 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 2213 transitions. Word has length 156 [2020-10-27 23:24:42,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:24:42,958 INFO L481 AbstractCegarLoop]: Abstraction has 1545 states and 2213 transitions. [2020-10-27 23:24:42,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:24:42,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 2213 transitions. [2020-10-27 23:24:42,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-27 23:24:42,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:24:42,962 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:24:42,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 23:24:42,962 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:24:42,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:24:42,963 INFO L82 PathProgramCache]: Analyzing trace with hash 144376268, now seen corresponding path program 1 times [2020-10-27 23:24:42,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:24:42,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86450152] [2020-10-27 23:24:42,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:24:43,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:43,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:43,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:43,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:43,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:43,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:43,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:43,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:43,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:44,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:45,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:46,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:47,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:47,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:47,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:47,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:48,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:48,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-27 23:24:48,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:24:48,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-27 23:24:48,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:48,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 23:24:48,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 23:24:48,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-27 23:24:48,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:48,520 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 23:24:48,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:24:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:48,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:48,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:48,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:24:48,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:24:48,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 23:24:48,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:48,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:24:48,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:24:48,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:24:48,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:48,595 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 23:24:48,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86450152] [2020-10-27 23:24:48,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:24:48,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 23:24:48,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130597160] [2020-10-27 23:24:48,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 23:24:48,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:24:48,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 23:24:48,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:24:48,599 INFO L87 Difference]: Start difference. First operand 1545 states and 2213 transitions. Second operand 6 states. [2020-10-27 23:24:49,032 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-27 23:24:50,914 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification that was a NOOP. DAG size: 220 [2020-10-27 23:24:51,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:24:51,730 INFO L93 Difference]: Finished difference Result 3080 states and 4578 transitions. [2020-10-27 23:24:51,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 23:24:51,731 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 156 [2020-10-27 23:24:51,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:24:51,743 INFO L225 Difference]: With dead ends: 3080 [2020-10-27 23:24:51,744 INFO L226 Difference]: Without dead ends: 2560 [2020-10-27 23:24:51,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 23:24:51,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2020-10-27 23:24:51,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 2557. [2020-10-27 23:24:51,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2557 states. [2020-10-27 23:24:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2557 states to 2557 states and 3712 transitions. [2020-10-27 23:24:51,936 INFO L78 Accepts]: Start accepts. Automaton has 2557 states and 3712 transitions. Word has length 156 [2020-10-27 23:24:51,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:24:51,936 INFO L481 AbstractCegarLoop]: Abstraction has 2557 states and 3712 transitions. [2020-10-27 23:24:51,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 23:24:51,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2557 states and 3712 transitions. [2020-10-27 23:24:51,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-27 23:24:51,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:24:51,941 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:24:51,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 23:24:51,941 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:24:51,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:24:51,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1885719984, now seen corresponding path program 1 times [2020-10-27 23:24:51,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:24:51,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771051114] [2020-10-27 23:24:51,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:24:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:52,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:52,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:52,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:52,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:52,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:52,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:52,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:52,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:52,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:54,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:55,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:55,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:55,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:56,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:56,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-27 23:24:56,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:24:56,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 23:24:56,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:56,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:24:56,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:24:56,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 23:24:56,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:57,468 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 23:24:57,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:24:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:24:57,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:24:57,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:24:57,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:24:57,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:24:57,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:24:57,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:24:57,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:24:57,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:24:57,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:24:57,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:24:57,539 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 23:24:57,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771051114] [2020-10-27 23:24:57,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:24:57,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:24:57,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129618287] [2020-10-27 23:24:57,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:24:57,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:24:57,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:24:57,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:24:57,541 INFO L87 Difference]: Start difference. First operand 2557 states and 3712 transitions. Second operand 5 states. [2020-10-27 23:25:00,336 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 23:25:01,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:25:01,785 INFO L93 Difference]: Finished difference Result 6679 states and 9670 transitions. [2020-10-27 23:25:01,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:25:01,787 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2020-10-27 23:25:01,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:25:01,806 INFO L225 Difference]: With dead ends: 6679 [2020-10-27 23:25:01,807 INFO L226 Difference]: Without dead ends: 4172 [2020-10-27 23:25:01,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:25:01,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2020-10-27 23:25:02,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 4133. [2020-10-27 23:25:02,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4133 states. [2020-10-27 23:25:02,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4133 states to 4133 states and 5931 transitions. [2020-10-27 23:25:02,170 INFO L78 Accepts]: Start accepts. Automaton has 4133 states and 5931 transitions. Word has length 156 [2020-10-27 23:25:02,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:25:02,171 INFO L481 AbstractCegarLoop]: Abstraction has 4133 states and 5931 transitions. [2020-10-27 23:25:02,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:25:02,171 INFO L276 IsEmpty]: Start isEmpty. Operand 4133 states and 5931 transitions. [2020-10-27 23:25:02,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-27 23:25:02,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:25:02,178 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:25:02,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 23:25:02,178 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:25:02,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:25:02,179 INFO L82 PathProgramCache]: Analyzing trace with hash 2012059259, now seen corresponding path program 1 times [2020-10-27 23:25:02,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:25:02,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829001512] [2020-10-27 23:25:02,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:25:02,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:25:02,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:02,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:02,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:02,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:02,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:02,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:02,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:02,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:02,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:02,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:03,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:03,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:07,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:07,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:25:07,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-27 23:25:07,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:25:07,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 23:25:07,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:25:07,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:25:07,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 23:25:07,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 23:25:07,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:25:07,658 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 23:25:07,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:25:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:25:07,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:07,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:25:07,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:25:07,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:25:07,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:25:07,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:25:07,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:25:07,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:25:07,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:25:07,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:25:07,699 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 23:25:07,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829001512] [2020-10-27 23:25:07,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:25:07,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:25:07,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510668163] [2020-10-27 23:25:07,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:25:07,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:25:07,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:25:07,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:25:07,701 INFO L87 Difference]: Start difference. First operand 4133 states and 5931 transitions. Second operand 5 states. [2020-10-27 23:25:09,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:25:09,778 INFO L93 Difference]: Finished difference Result 8226 states and 11803 transitions. [2020-10-27 23:25:09,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:25:09,779 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2020-10-27 23:25:09,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:25:09,793 INFO L225 Difference]: With dead ends: 8226 [2020-10-27 23:25:09,793 INFO L226 Difference]: Without dead ends: 4131 [2020-10-27 23:25:09,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:25:09,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2020-10-27 23:25:10,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 4130. [2020-10-27 23:25:10,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4130 states. [2020-10-27 23:25:10,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4130 states to 4130 states and 5922 transitions. [2020-10-27 23:25:10,156 INFO L78 Accepts]: Start accepts. Automaton has 4130 states and 5922 transitions. Word has length 157 [2020-10-27 23:25:10,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:25:10,157 INFO L481 AbstractCegarLoop]: Abstraction has 4130 states and 5922 transitions. [2020-10-27 23:25:10,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:25:10,157 INFO L276 IsEmpty]: Start isEmpty. Operand 4130 states and 5922 transitions. [2020-10-27 23:25:10,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-27 23:25:10,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:25:10,165 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:25:10,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 23:25:10,165 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:25:10,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:25:10,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1697671834, now seen corresponding path program 1 times [2020-10-27 23:25:10,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:25:10,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834783189] [2020-10-27 23:25:10,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:25:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:25:10,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:10,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:10,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:10,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:10,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:10,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:10,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:10,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:10,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:11,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:11,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:11,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:12,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:13,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:14,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:14,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:15,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:25:15,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-27 23:25:15,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 23:25:15,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 23:25:15,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:25:15,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:25:15,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 23:25:15,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 23:25:15,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:25:15,638 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 23:25:15,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:25:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:25:15,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:15,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:25:15,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:25:15,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:25:15,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:25:15,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:25:15,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:25:15,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:25:15,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:25:15,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:25:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 23:25:15,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834783189] [2020-10-27 23:25:15,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:25:15,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:25:15,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459219509] [2020-10-27 23:25:15,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:25:15,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:25:15,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:25:15,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:25:15,728 INFO L87 Difference]: Start difference. First operand 4130 states and 5922 transitions. Second operand 4 states. [2020-10-27 23:25:18,514 WARN L193 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-10-27 23:25:19,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:25:19,965 INFO L93 Difference]: Finished difference Result 10181 states and 14644 transitions. [2020-10-27 23:25:19,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:25:19,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 158 [2020-10-27 23:25:19,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:25:19,994 INFO L225 Difference]: With dead ends: 10181 [2020-10-27 23:25:19,994 INFO L226 Difference]: Without dead ends: 6447 [2020-10-27 23:25:20,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:25:20,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6447 states. [2020-10-27 23:25:20,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6447 to 6400. [2020-10-27 23:25:20,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6400 states. [2020-10-27 23:25:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6400 states to 6400 states and 9072 transitions. [2020-10-27 23:25:20,558 INFO L78 Accepts]: Start accepts. Automaton has 6400 states and 9072 transitions. Word has length 158 [2020-10-27 23:25:20,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:25:20,558 INFO L481 AbstractCegarLoop]: Abstraction has 6400 states and 9072 transitions. [2020-10-27 23:25:20,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:25:20,558 INFO L276 IsEmpty]: Start isEmpty. Operand 6400 states and 9072 transitions. [2020-10-27 23:25:20,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-27 23:25:20,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:25:20,569 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:25:20,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 23:25:20,570 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:25:20,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:25:20,570 INFO L82 PathProgramCache]: Analyzing trace with hash -2006570207, now seen corresponding path program 1 times [2020-10-27 23:25:20,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:25:20,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218873393] [2020-10-27 23:25:20,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:25:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:25:20,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:20,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:20,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:20,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:20,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:20,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:20,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:21,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:21,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:21,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:23,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:23,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:23,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:25,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:25:25,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-27 23:25:25,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 23:25:25,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 23:25:25,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:25:25,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 23:25:25,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 23:25:25,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 23:25:25,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:25:26,513 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 23:25:26,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:25:26,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:25:26,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:25:26,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:25:26,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:25:26,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:25:26,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 23:25:26,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:25:26,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:25:26,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:25:26,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:25:26,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:25:26,681 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 23:25:26,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218873393] [2020-10-27 23:25:26,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:25:26,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-27 23:25:26,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286057352] [2020-10-27 23:25:26,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 23:25:26,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:25:26,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 23:25:26,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-27 23:25:26,684 INFO L87 Difference]: Start difference. First operand 6400 states and 9072 transitions. Second operand 14 states. [2020-10-27 23:25:27,929 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 238 DAG size of output: 231 [2020-10-27 23:25:31,763 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2020-10-27 23:25:34,051 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2020-10-27 23:25:37,495 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2020-10-27 23:25:39,720 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2020-10-27 23:25:45,225 WARN L193 SmtUtils]: Spent 4.29 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-27 23:25:47,776 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2020-10-27 23:25:51,766 WARN L193 SmtUtils]: Spent 987.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 226 [2020-10-27 23:25:52,760 WARN L193 SmtUtils]: Spent 915.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 226 [2020-10-27 23:25:53,350 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-27 23:25:54,499 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-27 23:26:00,066 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 23 [2020-10-27 23:26:00,565 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2020-10-27 23:26:02,980 WARN L193 SmtUtils]: Spent 995.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 230 [2020-10-27 23:26:04,186 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 239 DAG size of output: 232 [2020-10-27 23:26:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:26:08,764 INFO L93 Difference]: Finished difference Result 47525 states and 71053 transitions. [2020-10-27 23:26:08,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 23:26:08,765 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 164 [2020-10-27 23:26:08,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:26:08,861 INFO L225 Difference]: With dead ends: 47525 [2020-10-27 23:26:08,862 INFO L226 Difference]: Without dead ends: 43001 [2020-10-27 23:26:08,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=721, Invalid=3061, Unknown=0, NotChecked=0, Total=3782 [2020-10-27 23:26:08,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43001 states. [2020-10-27 23:26:10,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43001 to 11610. [2020-10-27 23:26:10,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11610 states. [2020-10-27 23:26:10,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11610 states to 11610 states and 16432 transitions. [2020-10-27 23:26:10,337 INFO L78 Accepts]: Start accepts. Automaton has 11610 states and 16432 transitions. Word has length 164 [2020-10-27 23:26:10,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:26:10,338 INFO L481 AbstractCegarLoop]: Abstraction has 11610 states and 16432 transitions. [2020-10-27 23:26:10,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 23:26:10,338 INFO L276 IsEmpty]: Start isEmpty. Operand 11610 states and 16432 transitions. [2020-10-27 23:26:10,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-27 23:26:10,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:26:10,355 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:26:10,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 23:26:10,356 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:26:10,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:26:10,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1000941340, now seen corresponding path program 1 times [2020-10-27 23:26:10,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:26:10,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061830487] [2020-10-27 23:26:10,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:26:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:10,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:10,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:10,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:10,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:10,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:10,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:10,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:11,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:12,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:12,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:13,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:14,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:14,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:14,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:15,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:15,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:15,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-27 23:26:15,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 23:26:15,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 23:26:15,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:15,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 23:26:15,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-27 23:26:15,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 23:26:15,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:26:15,863 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 23:26:15,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:26:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:15,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:15,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:15,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:26:15,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:26:15,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 23:26:15,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:15,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:26:15,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:26:15,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:26:15,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:26:15,910 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 23:26:15,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061830487] [2020-10-27 23:26:15,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:26:15,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 23:26:15,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866332887] [2020-10-27 23:26:15,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 23:26:15,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:26:15,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 23:26:15,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 23:26:15,912 INFO L87 Difference]: Start difference. First operand 11610 states and 16432 transitions. Second operand 4 states. [2020-10-27 23:26:18,476 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2020-10-27 23:26:20,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:26:20,457 INFO L93 Difference]: Finished difference Result 30002 states and 43264 transitions. [2020-10-27 23:26:20,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:26:20,459 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 164 [2020-10-27 23:26:20,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:26:20,504 INFO L225 Difference]: With dead ends: 30002 [2020-10-27 23:26:20,504 INFO L226 Difference]: Without dead ends: 21189 [2020-10-27 23:26:20,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:26:20,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21189 states. [2020-10-27 23:26:22,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21189 to 21142. [2020-10-27 23:26:22,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21142 states. [2020-10-27 23:26:22,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21142 states to 21142 states and 30118 transitions. [2020-10-27 23:26:22,748 INFO L78 Accepts]: Start accepts. Automaton has 21142 states and 30118 transitions. Word has length 164 [2020-10-27 23:26:22,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:26:22,749 INFO L481 AbstractCegarLoop]: Abstraction has 21142 states and 30118 transitions. [2020-10-27 23:26:22,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 23:26:22,749 INFO L276 IsEmpty]: Start isEmpty. Operand 21142 states and 30118 transitions. [2020-10-27 23:26:22,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-27 23:26:22,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:26:22,772 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:26:22,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 23:26:22,772 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:26:22,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:26:22,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1383287183, now seen corresponding path program 1 times [2020-10-27 23:26:22,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:26:22,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753085] [2020-10-27 23:26:22,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:26:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:22,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:22,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:22,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:23,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:23,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:23,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:23,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:23,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:24,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:24,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:25,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:25,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:27,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:27,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-27 23:26:27,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 23:26:27,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 23:26:27,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:27,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:26:27,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 23:26:27,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 23:26:27,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:26:28,360 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 23:26:28,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:26:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:28,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:28,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:28,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:26:28,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:26:28,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 23:26:28,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:28,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:26:28,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:26:28,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:26:28,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:26:28,410 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 23:26:28,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753085] [2020-10-27 23:26:28,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:26:28,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:26:28,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224441339] [2020-10-27 23:26:28,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:26:28,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:26:28,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:26:28,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:26:28,413 INFO L87 Difference]: Start difference. First operand 21142 states and 30118 transitions. Second operand 5 states. [2020-10-27 23:26:33,000 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-27 23:26:37,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:26:37,070 INFO L93 Difference]: Finished difference Result 54520 states and 77505 transitions. [2020-10-27 23:26:37,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 23:26:37,071 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 164 [2020-10-27 23:26:37,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:26:37,138 INFO L225 Difference]: With dead ends: 54520 [2020-10-27 23:26:37,138 INFO L226 Difference]: Without dead ends: 33473 [2020-10-27 23:26:37,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 23:26:37,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33473 states. [2020-10-27 23:26:40,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33473 to 33431. [2020-10-27 23:26:40,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33431 states. [2020-10-27 23:26:40,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33431 states to 33431 states and 46946 transitions. [2020-10-27 23:26:40,617 INFO L78 Accepts]: Start accepts. Automaton has 33431 states and 46946 transitions. Word has length 164 [2020-10-27 23:26:40,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 23:26:40,618 INFO L481 AbstractCegarLoop]: Abstraction has 33431 states and 46946 transitions. [2020-10-27 23:26:40,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 23:26:40,618 INFO L276 IsEmpty]: Start isEmpty. Operand 33431 states and 46946 transitions. [2020-10-27 23:26:40,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-27 23:26:40,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 23:26:40,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:26:40,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 23:26:40,651 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 23:26:40,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 23:26:40,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1984385574, now seen corresponding path program 1 times [2020-10-27 23:26:40,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 23:26:40,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670347718] [2020-10-27 23:26:40,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 23:26:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:40,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:40,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:40,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:40,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:40,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:40,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:41,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:41,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:41,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:41,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:42,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:44,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:44,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:45,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:45,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:45,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-27 23:26:45,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 23:26:45,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 23:26:45,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:45,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 23:26:45,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 23:26:45,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 23:26:45,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:26:46,189 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-27 23:26:46,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 23:26:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 23:26:46,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 23:26:46,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 23:26:46,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 23:26:46,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 23:26:46,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 23:26:46,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 23:26:46,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 23:26:46,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 23:26:46,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 23:26:46,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 23:26:46,234 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 23:26:46,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670347718] [2020-10-27 23:26:46,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 23:26:46,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 23:26:46,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126202207] [2020-10-27 23:26:46,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 23:26:46,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 23:26:46,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 23:26:46,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 23:26:46,236 INFO L87 Difference]: Start difference. First operand 33431 states and 46946 transitions. Second operand 5 states. [2020-10-27 23:26:51,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 23:26:51,961 INFO L93 Difference]: Finished difference Result 66835 states and 93854 transitions. [2020-10-27 23:26:51,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 23:26:51,962 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 165 [2020-10-27 23:26:51,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 23:26:52,025 INFO L225 Difference]: With dead ends: 66835 [2020-10-27 23:26:52,026 INFO L226 Difference]: Without dead ends: 33429 [2020-10-27 23:26:52,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 23:26:52,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33429 states.