/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:36:33,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:36:33,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:36:33,794 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:36:33,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:36:33,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:36:33,803 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:36:33,808 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:36:33,811 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:36:33,816 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:36:33,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:36:33,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:36:33,819 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:36:33,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:36:33,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:36:33,828 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:36:33,829 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:36:33,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:36:33,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:36:33,837 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:36:33,844 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:36:33,847 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:36:33,848 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:36:33,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:36:33,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:36:33,852 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:36:33,852 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:36:33,853 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:36:33,854 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:36:33,856 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:36:33,856 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:36:33,858 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:36:33,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:36:33,859 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:36:33,860 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:36:33,861 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:36:33,861 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:36:33,862 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:36:33,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:36:33,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:36:33,863 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:36:33,864 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 05:36:33,894 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:36:33,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:36:33,896 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:36:33,896 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:36:33,896 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:36:33,896 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:36:33,897 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:36:33,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:36:33,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:36:33,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:36:33,900 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:36:33,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:36:33,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:36:33,900 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:36:33,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:36:33,901 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:36:33,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:36:33,901 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:36:33,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:36:33,911 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:36:33,911 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:36:33,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:36:33,912 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:36:33,912 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:36:33,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:36:33,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:36:33,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:36:33,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:36:33,915 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:36:33,915 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:36:34,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:36:34,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:36:34,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:36:34,335 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:36:34,336 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:36:34,337 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 05:36:34,423 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de19fa4b8/87a20ce398ae4132bc55baebde81fc12/FLAGfd614eda3 [2020-10-27 05:36:35,174 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:36:35,178 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 05:36:35,201 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de19fa4b8/87a20ce398ae4132bc55baebde81fc12/FLAGfd614eda3 [2020-10-27 05:36:35,372 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de19fa4b8/87a20ce398ae4132bc55baebde81fc12 [2020-10-27 05:36:35,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:36:35,384 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:36:35,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:36:35,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:36:35,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:36:35,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:36:35" (1/1) ... [2020-10-27 05:36:35,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15f56e01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:35, skipping insertion in model container [2020-10-27 05:36:35,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:36:35" (1/1) ... [2020-10-27 05:36:35,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:36:35,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:36:36,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:36:36,187 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:36:36,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:36:36,497 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:36:36,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:36 WrapperNode [2020-10-27 05:36:36,498 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:36:36,499 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:36:36,499 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:36:36,499 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:36:36,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:36" (1/1) ... [2020-10-27 05:36:36,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:36" (1/1) ... [2020-10-27 05:36:36,548 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:36" (1/1) ... [2020-10-27 05:36:36,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:36" (1/1) ... [2020-10-27 05:36:36,601 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:36" (1/1) ... [2020-10-27 05:36:36,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:36" (1/1) ... [2020-10-27 05:36:36,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:36" (1/1) ... [2020-10-27 05:36:36,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:36:36,669 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:36:36,669 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:36:36,669 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:36:36,670 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:36" (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 05:36:36,755 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:36:36,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:36:36,756 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:36:36,756 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:36:36,757 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:36:36,758 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:36:36,758 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:36:36,758 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:36:36,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:36:36,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:36:36,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:36:36,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:36:36,760 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:36:36,760 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:36:36,760 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:36:36,763 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:36:36,763 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:36:36,763 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:36:36,763 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:36:36,764 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:36:36,764 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:36:36,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:36:36,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:36:36,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:36:36,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:36:36,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:36:36,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:36:36,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:36:38,918 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:36:38,918 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:36:38,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:36:38 BoogieIcfgContainer [2020-10-27 05:36:38,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:36:38,923 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:36:38,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:36:38,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:36:38,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:36:35" (1/3) ... [2020-10-27 05:36:38,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5729eabb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:36:38, skipping insertion in model container [2020-10-27 05:36:38,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:36:36" (2/3) ... [2020-10-27 05:36:38,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5729eabb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:36:38, skipping insertion in model container [2020-10-27 05:36:38,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:36:38" (3/3) ... [2020-10-27 05:36:38,930 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 05:36:38,942 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:36:38,948 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:36:38,961 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:36:38,992 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:36:38,993 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:36:38,993 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:36:38,993 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:36:38,993 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:36:38,993 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:36:38,993 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:36:38,993 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:36:39,032 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states. [2020-10-27 05:36:39,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 05:36:39,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:39,064 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] [2020-10-27 05:36:39,064 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:39,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:39,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1123619796, now seen corresponding path program 1 times [2020-10-27 05:36:39,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:39,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701755249] [2020-10-27 05:36:39,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:39,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:39,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:40,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:40,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:40,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:41,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:41,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:43,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:44,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:44,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 05:36:44,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:36:44,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:36:44,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:44,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:36:44,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:36:44,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 05:36:44,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:36:45,341 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:36:45,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:45,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:45,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:45,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:45,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:45,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-27 05:36:45,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:45,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:36:45,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:45,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:36:45,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:36:45,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701755249] [2020-10-27 05:36:45,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:45,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:36:45,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437826568] [2020-10-27 05:36:45,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:36:45,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:45,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:36:45,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:36:45,475 INFO L87 Difference]: Start difference. First operand 450 states. Second operand 6 states. [2020-10-27 05:36:46,278 WARN L193 SmtUtils]: Spent 690.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-27 05:36:50,048 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-27 05:36:50,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:50,593 INFO L93 Difference]: Finished difference Result 749 states and 1314 transitions. [2020-10-27 05:36:50,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:36:50,594 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-27 05:36:50,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:50,627 INFO L225 Difference]: With dead ends: 749 [2020-10-27 05:36:50,628 INFO L226 Difference]: Without dead ends: 495 [2020-10-27 05:36:50,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:36:50,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-10-27 05:36:50,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 488. [2020-10-27 05:36:50,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2020-10-27 05:36:50,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 639 transitions. [2020-10-27 05:36:50,770 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 639 transitions. Word has length 54 [2020-10-27 05:36:50,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:36:50,772 INFO L481 AbstractCegarLoop]: Abstraction has 488 states and 639 transitions. [2020-10-27 05:36:50,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:36:50,772 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 639 transitions. [2020-10-27 05:36:50,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 05:36:50,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:50,777 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] [2020-10-27 05:36:50,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:36:50,778 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:50,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:50,780 INFO L82 PathProgramCache]: Analyzing trace with hash 115921361, now seen corresponding path program 1 times [2020-10-27 05:36:50,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:50,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578469030] [2020-10-27 05:36:50,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:50,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:50,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:50,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:51,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:51,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:52,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:52,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:52,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:55,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:55,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 05:36:55,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:36:55,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 05:36:55,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:55,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:36:55,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:36:55,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:36:55,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:56,612 WARN L193 SmtUtils]: Spent 581.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:36:56,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:56,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:56,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:56,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:56,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:56,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-27 05:36:56,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:56,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:36:56,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:56,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:36:56,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:56,713 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 05:36:56,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578469030] [2020-10-27 05:36:56,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:56,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:36:56,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75130671] [2020-10-27 05:36:56,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:36:56,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:56,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:36:56,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:36:56,720 INFO L87 Difference]: Start difference. First operand 488 states and 639 transitions. Second operand 8 states. [2020-10-27 05:36:57,523 WARN L193 SmtUtils]: Spent 723.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-27 05:37:00,426 WARN L193 SmtUtils]: Spent 634.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:37:02,165 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:37:02,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:37:02,422 INFO L93 Difference]: Finished difference Result 1025 states and 1460 transitions. [2020-10-27 05:37:02,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:37:02,423 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-10-27 05:37:02,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:37:02,431 INFO L225 Difference]: With dead ends: 1025 [2020-10-27 05:37:02,432 INFO L226 Difference]: Without dead ends: 1020 [2020-10-27 05:37:02,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:37:02,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2020-10-27 05:37:02,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 507. [2020-10-27 05:37:02,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2020-10-27 05:37:02,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 669 transitions. [2020-10-27 05:37:02,520 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 669 transitions. Word has length 54 [2020-10-27 05:37:02,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:37:02,521 INFO L481 AbstractCegarLoop]: Abstraction has 507 states and 669 transitions. [2020-10-27 05:37:02,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:37:02,521 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 669 transitions. [2020-10-27 05:37:02,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 05:37:02,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:02,527 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] [2020-10-27 05:37:02,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:37:02,527 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:02,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:02,531 INFO L82 PathProgramCache]: Analyzing trace with hash 775128329, now seen corresponding path program 1 times [2020-10-27 05:37:02,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:02,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813870427] [2020-10-27 05:37:02,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:02,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:02,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:02,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:02,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:03,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:04,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:04,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:04,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:07,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:07,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 05:37:07,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:37:07,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 05:37:07,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:07,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:37:07,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:37:07,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:37:07,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:08,415 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:37:08,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:37:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:08,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:08,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:08,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:37:08,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:37:08,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-27 05:37:08,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:08,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:37:08,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:37:08,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:37:08,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:08,526 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 05:37:08,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813870427] [2020-10-27 05:37:08,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:37:08,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:37:08,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267281308] [2020-10-27 05:37:08,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:37:08,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:37:08,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:37:08,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:37:08,529 INFO L87 Difference]: Start difference. First operand 507 states and 669 transitions. Second operand 8 states. [2020-10-27 05:37:09,355 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:37:12,241 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2020-10-27 05:37:13,976 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:37:14,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:37:14,272 INFO L93 Difference]: Finished difference Result 1183 states and 1706 transitions. [2020-10-27 05:37:14,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:37:14,272 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-10-27 05:37:14,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:37:14,279 INFO L225 Difference]: With dead ends: 1183 [2020-10-27 05:37:14,279 INFO L226 Difference]: Without dead ends: 1021 [2020-10-27 05:37:14,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:37:14,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2020-10-27 05:37:14,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 523. [2020-10-27 05:37:14,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 523 states. [2020-10-27 05:37:14,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 689 transitions. [2020-10-27 05:37:14,323 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 689 transitions. Word has length 54 [2020-10-27 05:37:14,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:37:14,324 INFO L481 AbstractCegarLoop]: Abstraction has 523 states and 689 transitions. [2020-10-27 05:37:14,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:37:14,324 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 689 transitions. [2020-10-27 05:37:14,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 05:37:14,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:14,326 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] [2020-10-27 05:37:14,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:37:14,326 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:14,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:14,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1835979788, now seen corresponding path program 1 times [2020-10-27 05:37:14,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:14,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608524961] [2020-10-27 05:37:14,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:14,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:14,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:14,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:14,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:14,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:14,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:14,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:16,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:17,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:19,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:19,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 05:37:19,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:37:19,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 05:37:19,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:19,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:37:19,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:37:19,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:37:19,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:20,095 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:37:20,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:37:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:20,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:20,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:20,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:37:20,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:37:20,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 05:37:20,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:20,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:37:20,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:37:20,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:37:20,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:20,175 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 05:37:20,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608524961] [2020-10-27 05:37:20,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:37:20,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:37:20,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273485680] [2020-10-27 05:37:20,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:37:20,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:37:20,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:37:20,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:37:20,182 INFO L87 Difference]: Start difference. First operand 523 states and 689 transitions. Second operand 8 states. [2020-10-27 05:37:20,878 WARN L193 SmtUtils]: Spent 636.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-27 05:37:23,649 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:37:25,567 WARN L193 SmtUtils]: Spent 632.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:37:25,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:37:25,839 INFO L93 Difference]: Finished difference Result 1409 states and 2017 transitions. [2020-10-27 05:37:25,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:37:25,840 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-10-27 05:37:25,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:37:25,852 INFO L225 Difference]: With dead ends: 1409 [2020-10-27 05:37:25,852 INFO L226 Difference]: Without dead ends: 1228 [2020-10-27 05:37:25,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:37:25,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2020-10-27 05:37:25,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 554. [2020-10-27 05:37:25,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2020-10-27 05:37:25,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 732 transitions. [2020-10-27 05:37:25,909 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 732 transitions. Word has length 54 [2020-10-27 05:37:25,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:37:25,911 INFO L481 AbstractCegarLoop]: Abstraction has 554 states and 732 transitions. [2020-10-27 05:37:25,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:37:25,912 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 732 transitions. [2020-10-27 05:37:25,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 05:37:25,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:25,915 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] [2020-10-27 05:37:25,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:37:25,916 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:25,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:25,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1617453592, now seen corresponding path program 1 times [2020-10-27 05:37:25,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:25,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907222051] [2020-10-27 05:37:25,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:25,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:26,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:26,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:26,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:26,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:26,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:27,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:27,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:27,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:27,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:28,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:28,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:30,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:30,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 05:37:30,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:37:30,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 05:37:30,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:30,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:37:30,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:37:30,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:37:30,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:32,076 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:37:32,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:37:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:32,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:32,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:32,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:37:32,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:37:32,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 05:37:32,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:32,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:37:32,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:37:32,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:37:32,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:32,184 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 05:37:32,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907222051] [2020-10-27 05:37:32,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:37:32,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:37:32,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342208159] [2020-10-27 05:37:32,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:37:32,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:37:32,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:37:32,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:37:32,186 INFO L87 Difference]: Start difference. First operand 554 states and 732 transitions. Second operand 10 states. [2020-10-27 05:37:32,910 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-27 05:37:36,305 WARN L193 SmtUtils]: Spent 762.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2020-10-27 05:37:38,514 WARN L193 SmtUtils]: Spent 739.00 ms on a formula simplification that was a NOOP. DAG size: 305 [2020-10-27 05:37:39,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:37:39,054 INFO L93 Difference]: Finished difference Result 1675 states and 2414 transitions. [2020-10-27 05:37:39,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 05:37:39,055 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-27 05:37:39,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:37:39,063 INFO L225 Difference]: With dead ends: 1675 [2020-10-27 05:37:39,063 INFO L226 Difference]: Without dead ends: 1481 [2020-10-27 05:37:39,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2020-10-27 05:37:39,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2020-10-27 05:37:39,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 551. [2020-10-27 05:37:39,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 551 states. [2020-10-27 05:37:39,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 725 transitions. [2020-10-27 05:37:39,121 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 725 transitions. Word has length 54 [2020-10-27 05:37:39,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:37:39,121 INFO L481 AbstractCegarLoop]: Abstraction has 551 states and 725 transitions. [2020-10-27 05:37:39,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:37:39,121 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 725 transitions. [2020-10-27 05:37:39,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:37:39,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:39,123 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] [2020-10-27 05:37:39,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:37:39,124 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:39,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:39,124 INFO L82 PathProgramCache]: Analyzing trace with hash -725410305, now seen corresponding path program 1 times [2020-10-27 05:37:39,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:39,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100565473] [2020-10-27 05:37:39,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:39,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:39,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:39,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:39,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:39,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:40,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:40,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:40,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:40,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:41,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:44,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:44,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:37:44,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:37:44,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:37:44,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:44,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:37:44,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:37:44,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:37:44,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:44,931 WARN L193 SmtUtils]: Spent 574.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:37:44,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:37:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:44,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:44,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:44,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:37:44,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:37:44,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 05:37:44,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:44,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:37:44,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:37:44,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:37:44,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:45,018 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 05:37:45,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100565473] [2020-10-27 05:37:45,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:37:45,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:37:45,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856294822] [2020-10-27 05:37:45,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:37:45,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:37:45,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:37:45,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:37:45,022 INFO L87 Difference]: Start difference. First operand 551 states and 725 transitions. Second operand 8 states. [2020-10-27 05:37:45,755 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:37:48,531 WARN L193 SmtUtils]: Spent 702.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2020-10-27 05:37:50,013 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:37:50,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:37:50,212 INFO L93 Difference]: Finished difference Result 1404 states and 1992 transitions. [2020-10-27 05:37:50,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:37:50,212 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-27 05:37:50,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:37:50,219 INFO L225 Difference]: With dead ends: 1404 [2020-10-27 05:37:50,219 INFO L226 Difference]: Without dead ends: 1218 [2020-10-27 05:37:50,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:37:50,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2020-10-27 05:37:50,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 551. [2020-10-27 05:37:50,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 551 states. [2020-10-27 05:37:50,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 725 transitions. [2020-10-27 05:37:50,278 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 725 transitions. Word has length 55 [2020-10-27 05:37:50,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:37:50,279 INFO L481 AbstractCegarLoop]: Abstraction has 551 states and 725 transitions. [2020-10-27 05:37:50,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:37:50,279 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 725 transitions. [2020-10-27 05:37:50,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:37:50,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:50,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:37:50,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:37:50,281 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:50,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:50,281 INFO L82 PathProgramCache]: Analyzing trace with hash -66203337, now seen corresponding path program 1 times [2020-10-27 05:37:50,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:50,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089367540] [2020-10-27 05:37:50,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:50,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:50,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:50,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:50,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:50,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:55,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:55,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:37:55,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:37:55,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 05:37:55,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:55,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:37:55,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:37:55,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:37:55,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:37:56,167 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:37:56,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:37:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:56,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:56,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:56,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:37:56,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:37:56,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 05:37:56,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:56,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:37:56,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:37:56,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:37:56,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:56,234 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 05:37:56,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089367540] [2020-10-27 05:37:56,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:37:56,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:37:56,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113455457] [2020-10-27 05:37:56,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:37:56,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:37:56,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:37:56,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:37:56,237 INFO L87 Difference]: Start difference. First operand 551 states and 725 transitions. Second operand 8 states. [2020-10-27 05:37:56,985 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:37:59,774 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2020-10-27 05:38:01,149 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:38:01,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:01,329 INFO L93 Difference]: Finished difference Result 1263 states and 1777 transitions. [2020-10-27 05:38:01,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:38:01,329 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-27 05:38:01,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:01,334 INFO L225 Difference]: With dead ends: 1263 [2020-10-27 05:38:01,334 INFO L226 Difference]: Without dead ends: 988 [2020-10-27 05:38:01,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:38:01,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2020-10-27 05:38:01,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 561. [2020-10-27 05:38:01,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 561 states. [2020-10-27 05:38:01,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 731 transitions. [2020-10-27 05:38:01,391 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 731 transitions. Word has length 55 [2020-10-27 05:38:01,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:01,392 INFO L481 AbstractCegarLoop]: Abstraction has 561 states and 731 transitions. [2020-10-27 05:38:01,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:38:01,392 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 731 transitions. [2020-10-27 05:38:01,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:38:01,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:01,394 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] [2020-10-27 05:38:01,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:38:01,394 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:01,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:01,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1440574905, now seen corresponding path program 1 times [2020-10-27 05:38:01,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:01,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630495257] [2020-10-27 05:38:01,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:01,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:01,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:01,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:01,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:01,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:02,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:04,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:04,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:38:04,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:38:04,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3336 [2020-10-27 05:38:04,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:04,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:38:04,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:38:04,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:38:04,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:05,559 WARN L193 SmtUtils]: Spent 639.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:38:05,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:05,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:05,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:05,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:05,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:05,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:38:05,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:05,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:38:05,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:05,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:38:05,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:05,623 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 05:38:05,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630495257] [2020-10-27 05:38:05,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:05,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:38:05,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360924856] [2020-10-27 05:38:05,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:38:05,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:05,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:38:05,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:38:05,631 INFO L87 Difference]: Start difference. First operand 561 states and 731 transitions. Second operand 9 states. [2020-10-27 05:38:06,422 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2020-10-27 05:38:09,254 WARN L193 SmtUtils]: Spent 743.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2020-10-27 05:38:10,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:10,361 INFO L93 Difference]: Finished difference Result 1301 states and 1807 transitions. [2020-10-27 05:38:10,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:38:10,362 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-10-27 05:38:10,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:10,368 INFO L225 Difference]: With dead ends: 1301 [2020-10-27 05:38:10,368 INFO L226 Difference]: Without dead ends: 987 [2020-10-27 05:38:10,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:38:10,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2020-10-27 05:38:10,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 671. [2020-10-27 05:38:10,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 671 states. [2020-10-27 05:38:10,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 905 transitions. [2020-10-27 05:38:10,457 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 905 transitions. Word has length 56 [2020-10-27 05:38:10,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:10,458 INFO L481 AbstractCegarLoop]: Abstraction has 671 states and 905 transitions. [2020-10-27 05:38:10,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:38:10,458 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 905 transitions. [2020-10-27 05:38:10,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:38:10,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:10,459 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] [2020-10-27 05:38:10,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:38:10,460 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:10,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:10,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1507113850, now seen corresponding path program 1 times [2020-10-27 05:38:10,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:10,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885471400] [2020-10-27 05:38:10,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:10,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:10,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:10,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:10,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:10,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:11,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:11,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:12,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:12,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:12,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:13,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:13,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:13,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:14,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:15,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:15,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:38:15,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:38:15,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 05:38:15,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:15,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:38:15,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:38:15,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:38:15,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:16,274 WARN L193 SmtUtils]: Spent 631.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:38:16,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:16,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:16,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:16,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:16,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:16,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 05:38:16,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:16,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:38:16,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:16,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:38:16,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:16,360 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 05:38:16,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885471400] [2020-10-27 05:38:16,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:16,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:38:16,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865678183] [2020-10-27 05:38:16,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:38:16,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:16,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:38:16,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:38:16,363 INFO L87 Difference]: Start difference. First operand 671 states and 905 transitions. Second operand 8 states. [2020-10-27 05:38:17,119 WARN L193 SmtUtils]: Spent 690.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-27 05:38:19,644 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:38:21,274 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-27 05:38:21,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:21,695 INFO L93 Difference]: Finished difference Result 1859 states and 2635 transitions. [2020-10-27 05:38:21,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:38:21,695 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-27 05:38:21,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:21,703 INFO L225 Difference]: With dead ends: 1859 [2020-10-27 05:38:21,704 INFO L226 Difference]: Without dead ends: 1592 [2020-10-27 05:38:21,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:38:21,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1592 states. [2020-10-27 05:38:21,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1592 to 661. [2020-10-27 05:38:21,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 661 states. [2020-10-27 05:38:21,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 888 transitions. [2020-10-27 05:38:21,810 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 888 transitions. Word has length 56 [2020-10-27 05:38:21,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:21,811 INFO L481 AbstractCegarLoop]: Abstraction has 661 states and 888 transitions. [2020-10-27 05:38:21,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:38:21,811 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 888 transitions. [2020-10-27 05:38:21,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:38:21,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:21,813 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] [2020-10-27 05:38:21,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:38:21,813 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:21,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:21,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1711842289, now seen corresponding path program 1 times [2020-10-27 05:38:21,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:21,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138063687] [2020-10-27 05:38:21,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:21,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:21,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:21,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:22,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:22,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:26,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:26,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:38:26,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:38:26,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4415 [2020-10-27 05:38:26,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:26,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:38:26,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:38:26,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 05:38:26,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:27,094 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:38:27,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:27,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:27,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:27,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:27,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:27,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:27,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:38:27,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:27,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:38:27,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:27,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:38:27,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:27,128 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 05:38:27,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138063687] [2020-10-27 05:38:27,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:27,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:38:27,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862973257] [2020-10-27 05:38:27,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:38:27,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:27,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:38:27,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:38:27,131 INFO L87 Difference]: Start difference. First operand 661 states and 888 transitions. Second operand 9 states. [2020-10-27 05:38:27,902 WARN L193 SmtUtils]: Spent 708.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:38:30,514 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:38:31,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:31,605 INFO L93 Difference]: Finished difference Result 1768 states and 2531 transitions. [2020-10-27 05:38:31,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:38:31,606 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-27 05:38:31,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:31,613 INFO L225 Difference]: With dead ends: 1768 [2020-10-27 05:38:31,613 INFO L226 Difference]: Without dead ends: 1538 [2020-10-27 05:38:31,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:38:31,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2020-10-27 05:38:31,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 648. [2020-10-27 05:38:31,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-10-27 05:38:31,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 869 transitions. [2020-10-27 05:38:31,724 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 869 transitions. Word has length 57 [2020-10-27 05:38:31,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:31,724 INFO L481 AbstractCegarLoop]: Abstraction has 648 states and 869 transitions. [2020-10-27 05:38:31,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:38:31,725 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 869 transitions. [2020-10-27 05:38:31,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:38:31,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:31,726 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] [2020-10-27 05:38:31,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:38:31,727 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:31,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:31,727 INFO L82 PathProgramCache]: Analyzing trace with hash -730277509, now seen corresponding path program 1 times [2020-10-27 05:38:31,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:31,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895195066] [2020-10-27 05:38:31,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:31,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:31,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:32,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:32,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:32,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:36,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:36,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:38:36,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:38:36,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4641 [2020-10-27 05:38:36,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:36,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:38:36,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:38:36,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 05:38:36,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:37,240 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:38:37,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:37,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:37,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:37,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:37,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:37,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:37,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:38:37,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:37,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:38:37,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:37,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:38:37,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:37,287 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 05:38:37,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895195066] [2020-10-27 05:38:37,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:37,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:38:37,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137398565] [2020-10-27 05:38:37,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:38:37,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:37,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:38:37,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:38:37,290 INFO L87 Difference]: Start difference. First operand 648 states and 869 transitions. Second operand 9 states. [2020-10-27 05:38:38,023 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:38:41,372 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:38:41,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:41,736 INFO L93 Difference]: Finished difference Result 1794 states and 2581 transitions. [2020-10-27 05:38:41,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:38:41,736 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 57 [2020-10-27 05:38:41,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:41,743 INFO L225 Difference]: With dead ends: 1794 [2020-10-27 05:38:41,744 INFO L226 Difference]: Without dead ends: 1526 [2020-10-27 05:38:41,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:38:41,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2020-10-27 05:38:41,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 618. [2020-10-27 05:38:41,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618 states. [2020-10-27 05:38:41,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 830 transitions. [2020-10-27 05:38:41,848 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 830 transitions. Word has length 57 [2020-10-27 05:38:41,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:41,848 INFO L481 AbstractCegarLoop]: Abstraction has 618 states and 830 transitions. [2020-10-27 05:38:41,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:38:41,849 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 830 transitions. [2020-10-27 05:38:41,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:38:41,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:41,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:38:41,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:38:41,851 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:41,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:41,851 INFO L82 PathProgramCache]: Analyzing trace with hash 962561990, now seen corresponding path program 1 times [2020-10-27 05:38:41,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:41,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304480629] [2020-10-27 05:38:41,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:41,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:41,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:41,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:41,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:42,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:42,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:42,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:45,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:45,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:38:45,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:38:45,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4048 [2020-10-27 05:38:45,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:45,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:38:45,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:38:45,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 05:38:45,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:46,611 WARN L193 SmtUtils]: Spent 608.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:38:46,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:46,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:46,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:46,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:46,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:46,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:46,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:38:46,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:46,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:38:46,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:46,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:38:46,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:46,660 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 05:38:46,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304480629] [2020-10-27 05:38:46,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:46,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:38:46,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643832638] [2020-10-27 05:38:46,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:38:46,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:46,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:38:46,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:38:46,662 INFO L87 Difference]: Start difference. First operand 618 states and 830 transitions. Second operand 6 states. [2020-10-27 05:38:49,681 WARN L193 SmtUtils]: Spent 723.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2020-10-27 05:38:50,419 WARN L193 SmtUtils]: Spent 697.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:38:51,225 WARN L193 SmtUtils]: Spent 728.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-27 05:38:51,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:51,480 INFO L93 Difference]: Finished difference Result 1365 states and 1938 transitions. [2020-10-27 05:38:51,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:38:51,481 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-27 05:38:51,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:51,485 INFO L225 Difference]: With dead ends: 1365 [2020-10-27 05:38:51,485 INFO L226 Difference]: Without dead ends: 1039 [2020-10-27 05:38:51,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:38:51,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2020-10-27 05:38:51,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 1033. [2020-10-27 05:38:51,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1033 states. [2020-10-27 05:38:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1434 transitions. [2020-10-27 05:38:51,708 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1434 transitions. Word has length 68 [2020-10-27 05:38:51,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:51,708 INFO L481 AbstractCegarLoop]: Abstraction has 1033 states and 1434 transitions. [2020-10-27 05:38:51,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:38:51,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1434 transitions. [2020-10-27 05:38:51,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:38:51,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:51,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:38:51,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:38:51,712 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:51,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:51,713 INFO L82 PathProgramCache]: Analyzing trace with hash -532836403, now seen corresponding path program 1 times [2020-10-27 05:38:51,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:51,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385868993] [2020-10-27 05:38:51,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:51,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:51,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:51,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:51,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:52,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:52,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:55,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:55,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:38:55,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:38:55,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3443 [2020-10-27 05:38:55,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:55,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:38:55,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:38:55,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 05:38:55,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:55,861 WARN L193 SmtUtils]: Spent 608.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:38:55,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:55,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:55,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:55,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:55,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:55,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:38:55,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:55,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:38:55,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:55,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:38:55,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:55,907 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 05:38:55,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385868993] [2020-10-27 05:38:55,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:55,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:38:55,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49392709] [2020-10-27 05:38:55,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:38:55,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:55,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:38:55,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:38:55,909 INFO L87 Difference]: Start difference. First operand 1033 states and 1434 transitions. Second operand 6 states. [2020-10-27 05:38:56,619 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-27 05:38:58,904 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-27 05:38:59,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:59,057 INFO L93 Difference]: Finished difference Result 2064 states and 2938 transitions. [2020-10-27 05:38:59,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:38:59,058 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-27 05:38:59,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:59,063 INFO L225 Difference]: With dead ends: 2064 [2020-10-27 05:38:59,063 INFO L226 Difference]: Without dead ends: 1233 [2020-10-27 05:38:59,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:38:59,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2020-10-27 05:38:59,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1230. [2020-10-27 05:38:59,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1230 states. [2020-10-27 05:38:59,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1726 transitions. [2020-10-27 05:38:59,300 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1726 transitions. Word has length 68 [2020-10-27 05:38:59,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:59,300 INFO L481 AbstractCegarLoop]: Abstraction has 1230 states and 1726 transitions. [2020-10-27 05:38:59,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:38:59,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1726 transitions. [2020-10-27 05:38:59,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 05:38:59,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:59,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:38:59,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:38:59,304 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:59,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:59,304 INFO L82 PathProgramCache]: Analyzing trace with hash -172029241, now seen corresponding path program 1 times [2020-10-27 05:38:59,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:59,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346363649] [2020-10-27 05:38:59,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:59,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:59,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:59,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:59,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:59,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:59,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:59,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:00,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:04,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:04,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 05:39:04,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:39:04,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:39:04,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:04,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:39:04,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:39:04,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 05:39:04,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:05,116 WARN L193 SmtUtils]: Spent 668.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:39:05,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:05,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:05,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:05,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:05,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:05,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:39:05,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:05,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:39:05,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:05,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:39:05,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:05,173 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 05:39:05,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346363649] [2020-10-27 05:39:05,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:05,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:39:05,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967563536] [2020-10-27 05:39:05,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:39:05,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:05,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:39:05,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:39:05,175 INFO L87 Difference]: Start difference. First operand 1230 states and 1726 transitions. Second operand 9 states. [2020-10-27 05:39:06,021 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2020-10-27 05:39:09,353 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:39:10,166 WARN L193 SmtUtils]: Spent 701.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:39:10,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:39:10,547 INFO L93 Difference]: Finished difference Result 3562 states and 5106 transitions. [2020-10-27 05:39:10,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:39:10,548 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-10-27 05:39:10,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:39:10,558 INFO L225 Difference]: With dead ends: 3562 [2020-10-27 05:39:10,558 INFO L226 Difference]: Without dead ends: 2928 [2020-10-27 05:39:10,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:39:10,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2928 states. [2020-10-27 05:39:10,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2928 to 1246. [2020-10-27 05:39:10,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1246 states. [2020-10-27 05:39:10,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 1740 transitions. [2020-10-27 05:39:10,827 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 1740 transitions. Word has length 69 [2020-10-27 05:39:10,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:39:10,827 INFO L481 AbstractCegarLoop]: Abstraction has 1246 states and 1740 transitions. [2020-10-27 05:39:10,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:39:10,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 1740 transitions. [2020-10-27 05:39:10,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 05:39:10,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:39:10,830 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:39:10,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:39:10,831 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:39:10,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:39:10,831 INFO L82 PathProgramCache]: Analyzing trace with hash 179432308, now seen corresponding path program 1 times [2020-10-27 05:39:10,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:39:10,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194073810] [2020-10-27 05:39:10,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:39:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:10,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:10,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:10,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:10,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:11,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:11,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:12,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:15,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:15,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 05:39:15,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:39:15,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4888 [2020-10-27 05:39:15,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:15,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:39:15,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:39:15,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:39:15,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:16,513 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:39:16,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:16,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:16,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:16,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:16,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:16,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:16,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 05:39:16,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:16,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:39:16,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:16,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:39:16,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:16,598 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 05:39:16,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194073810] [2020-10-27 05:39:16,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:16,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:39:16,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516852880] [2020-10-27 05:39:16,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:39:16,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:16,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:39:16,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:39:16,600 INFO L87 Difference]: Start difference. First operand 1246 states and 1740 transitions. Second operand 10 states. [2020-10-27 05:39:17,348 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2020-10-27 05:39:21,141 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:39:21,985 WARN L193 SmtUtils]: Spent 690.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-27 05:39:22,838 WARN L193 SmtUtils]: Spent 718.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2020-10-27 05:39:23,943 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-27 05:39:25,480 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 304 DAG size of output: 302 [2020-10-27 05:39:26,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:39:26,085 INFO L93 Difference]: Finished difference Result 5017 states and 7364 transitions. [2020-10-27 05:39:26,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 05:39:26,086 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-10-27 05:39:26,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:39:26,099 INFO L225 Difference]: With dead ends: 5017 [2020-10-27 05:39:26,100 INFO L226 Difference]: Without dead ends: 4196 [2020-10-27 05:39:26,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2020-10-27 05:39:26,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4196 states. [2020-10-27 05:39:26,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4196 to 1269. [2020-10-27 05:39:26,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1269 states. [2020-10-27 05:39:26,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 1760 transitions. [2020-10-27 05:39:26,422 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 1760 transitions. Word has length 69 [2020-10-27 05:39:26,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:39:26,422 INFO L481 AbstractCegarLoop]: Abstraction has 1269 states and 1760 transitions. [2020-10-27 05:39:26,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:39:26,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 1760 transitions. [2020-10-27 05:39:26,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 05:39:26,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:39:26,425 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:39:26,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:39:26,425 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:39:26,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:39:26,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1972328831, now seen corresponding path program 1 times [2020-10-27 05:39:26,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:39:26,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806241611] [2020-10-27 05:39:26,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:39:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:26,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:26,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:26,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:26,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:26,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:27,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:27,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 05:39:27,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:39:27,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1074 [2020-10-27 05:39:27,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:27,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:39:27,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 05:39:27,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 05:39:27,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:28,194 WARN L193 SmtUtils]: Spent 606.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:39:28,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:28,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:28,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:28,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:28,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:28,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:39:28,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:28,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:39:28,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:28,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:39:28,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:28,228 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 05:39:28,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806241611] [2020-10-27 05:39:28,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:28,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:39:28,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695738968] [2020-10-27 05:39:28,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:39:28,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:28,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:39:28,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:39:28,230 INFO L87 Difference]: Start difference. First operand 1269 states and 1760 transitions. Second operand 6 states. [2020-10-27 05:39:28,942 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-27 05:39:31,185 WARN L193 SmtUtils]: Spent 632.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-27 05:39:31,899 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification that was a NOOP. DAG size: 294 [2020-10-27 05:39:32,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:39:32,198 INFO L93 Difference]: Finished difference Result 3798 states and 5527 transitions. [2020-10-27 05:39:32,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:39:32,198 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-27 05:39:32,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:39:32,211 INFO L225 Difference]: With dead ends: 3798 [2020-10-27 05:39:32,211 INFO L226 Difference]: Without dead ends: 3060 [2020-10-27 05:39:32,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:39:32,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3060 states. [2020-10-27 05:39:32,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3060 to 2103. [2020-10-27 05:39:32,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2103 states. [2020-10-27 05:39:32,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 2974 transitions. [2020-10-27 05:39:32,654 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 2974 transitions. Word has length 70 [2020-10-27 05:39:32,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:39:32,654 INFO L481 AbstractCegarLoop]: Abstraction has 2103 states and 2974 transitions. [2020-10-27 05:39:32,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:39:32,655 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 2974 transitions. [2020-10-27 05:39:32,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:39:32,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:39:32,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:39:32,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:39:32,658 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:39:32,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:39:32,659 INFO L82 PathProgramCache]: Analyzing trace with hash 446251704, now seen corresponding path program 1 times [2020-10-27 05:39:32,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:39:32,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949737336] [2020-10-27 05:39:32,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:39:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:32,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:32,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:32,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:33,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:33,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:39:33,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:39:33,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 496 [2020-10-27 05:39:33,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:33,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:39:33,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-27 05:39:33,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 05:39:33,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:33,904 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:39:33,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:33,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:33,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:33,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:33,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:33,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:39:33,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:33,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:39:33,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:33,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:39:33,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:33,936 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 05:39:33,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949737336] [2020-10-27 05:39:33,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:33,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:39:33,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257230538] [2020-10-27 05:39:33,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:39:33,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:33,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:39:33,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:39:33,938 INFO L87 Difference]: Start difference. First operand 2103 states and 2974 transitions. Second operand 4 states. [2020-10-27 05:39:34,643 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2020-10-27 05:39:37,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:39:37,023 INFO L93 Difference]: Finished difference Result 4889 states and 7050 transitions. [2020-10-27 05:39:37,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:39:37,023 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-27 05:39:37,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:39:37,035 INFO L225 Difference]: With dead ends: 4889 [2020-10-27 05:39:37,035 INFO L226 Difference]: Without dead ends: 3416 [2020-10-27 05:39:37,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:39:37,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2020-10-27 05:39:37,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 3165. [2020-10-27 05:39:37,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3165 states. [2020-10-27 05:39:37,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3165 states to 3165 states and 4522 transitions. [2020-10-27 05:39:37,747 INFO L78 Accepts]: Start accepts. Automaton has 3165 states and 4522 transitions. Word has length 71 [2020-10-27 05:39:37,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:39:37,748 INFO L481 AbstractCegarLoop]: Abstraction has 3165 states and 4522 transitions. [2020-10-27 05:39:37,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:39:37,748 INFO L276 IsEmpty]: Start isEmpty. Operand 3165 states and 4522 transitions. [2020-10-27 05:39:37,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:39:37,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:39:37,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:39:37,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:39:37,751 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:39:37,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:39:37,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1076444591, now seen corresponding path program 1 times [2020-10-27 05:39:37,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:39:37,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311594596] [2020-10-27 05:39:37,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:39:37,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:37,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:37,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:38,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:38,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:39:38,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:39:38,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-10-27 05:39:38,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:38,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:39:38,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-27 05:39:38,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 05:39:38,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:38,808 WARN L193 SmtUtils]: Spent 668.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:39:38,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:38,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:38,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:38,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:38,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:38,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:39:38,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:38,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:39:38,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:38,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:39:38,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:38,840 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 05:39:38,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311594596] [2020-10-27 05:39:38,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:38,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:39:38,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506813215] [2020-10-27 05:39:38,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:39:38,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:38,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:39:38,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:39:38,842 INFO L87 Difference]: Start difference. First operand 3165 states and 4522 transitions. Second operand 4 states. [2020-10-27 05:39:39,628 WARN L193 SmtUtils]: Spent 737.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2020-10-27 05:39:42,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:39:42,268 INFO L93 Difference]: Finished difference Result 7947 states and 11470 transitions. [2020-10-27 05:39:42,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:39:42,268 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-27 05:39:42,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:39:42,280 INFO L225 Difference]: With dead ends: 7947 [2020-10-27 05:39:42,280 INFO L226 Difference]: Without dead ends: 5412 [2020-10-27 05:39:42,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:39:42,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5412 states. [2020-10-27 05:39:43,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5412 to 4933. [2020-10-27 05:39:43,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4933 states. [2020-10-27 05:39:43,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4933 states to 4933 states and 7050 transitions. [2020-10-27 05:39:43,397 INFO L78 Accepts]: Start accepts. Automaton has 4933 states and 7050 transitions. Word has length 72 [2020-10-27 05:39:43,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:39:43,397 INFO L481 AbstractCegarLoop]: Abstraction has 4933 states and 7050 transitions. [2020-10-27 05:39:43,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:39:43,398 INFO L276 IsEmpty]: Start isEmpty. Operand 4933 states and 7050 transitions. [2020-10-27 05:39:43,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 05:39:43,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:39:43,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:39:43,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:39:43,400 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:39:43,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:39:43,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1199999613, now seen corresponding path program 1 times [2020-10-27 05:39:43,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:39:43,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617947210] [2020-10-27 05:39:43,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:39:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:43,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:43,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:43,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:43,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:43,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:43,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:43,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:44,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:45,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:45,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 05:39:45,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:39:45,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1615 [2020-10-27 05:39:45,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:45,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:39:45,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:39:45,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 05:39:45,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:45,727 WARN L193 SmtUtils]: Spent 610.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:39:45,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:45,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:45,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:45,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:45,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:45,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:39:45,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:45,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:39:45,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:45,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:39:45,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:45,780 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 05:39:45,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617947210] [2020-10-27 05:39:45,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:45,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:39:45,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36404256] [2020-10-27 05:39:45,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:39:45,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:45,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:39:45,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:39:45,782 INFO L87 Difference]: Start difference. First operand 4933 states and 7050 transitions. Second operand 6 states. [2020-10-27 05:39:48,556 WARN L193 SmtUtils]: Spent 725.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2020-10-27 05:39:49,319 WARN L193 SmtUtils]: Spent 723.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-27 05:39:50,072 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:39:51,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:39:51,943 INFO L93 Difference]: Finished difference Result 10490 states and 14915 transitions. [2020-10-27 05:39:51,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:39:51,944 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-27 05:39:51,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:39:51,961 INFO L225 Difference]: With dead ends: 10490 [2020-10-27 05:39:51,961 INFO L226 Difference]: Without dead ends: 8381 [2020-10-27 05:39:51,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:39:51,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8381 states. [2020-10-27 05:39:54,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8381 to 8375. [2020-10-27 05:39:54,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8375 states. [2020-10-27 05:39:54,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8375 states to 8375 states and 11835 transitions. [2020-10-27 05:39:54,034 INFO L78 Accepts]: Start accepts. Automaton has 8375 states and 11835 transitions. Word has length 73 [2020-10-27 05:39:54,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:39:54,034 INFO L481 AbstractCegarLoop]: Abstraction has 8375 states and 11835 transitions. [2020-10-27 05:39:54,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:39:54,035 INFO L276 IsEmpty]: Start isEmpty. Operand 8375 states and 11835 transitions. [2020-10-27 05:39:54,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 05:39:54,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:39:54,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:39:54,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 05:39:54,038 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:39:54,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:39:54,039 INFO L82 PathProgramCache]: Analyzing trace with hash 825683919, now seen corresponding path program 1 times [2020-10-27 05:39:54,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:39:54,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511699086] [2020-10-27 05:39:54,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:39:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:54,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:54,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:54,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:54,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:54,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 05:39:54,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:39:54,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 769 [2020-10-27 05:39:54,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:54,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:39:54,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:39:54,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 05:39:54,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:55,499 WARN L193 SmtUtils]: Spent 614.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:39:55,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:55,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:55,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:55,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:55,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:55,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:39:55,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:55,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:39:55,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:55,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:39:55,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:55,549 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 05:39:55,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511699086] [2020-10-27 05:39:55,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:55,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:39:55,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813514521] [2020-10-27 05:39:55,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:39:55,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:55,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:39:55,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:39:55,551 INFO L87 Difference]: Start difference. First operand 8375 states and 11835 transitions. Second operand 6 states. [2020-10-27 05:39:56,290 WARN L193 SmtUtils]: Spent 676.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-27 05:39:58,570 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-27 05:40:01,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:40:01,709 INFO L93 Difference]: Finished difference Result 18991 states and 26972 transitions. [2020-10-27 05:40:01,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:40:01,709 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-27 05:40:01,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:40:01,735 INFO L225 Difference]: With dead ends: 18991 [2020-10-27 05:40:01,736 INFO L226 Difference]: Without dead ends: 13514 [2020-10-27 05:40:01,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:40:01,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13514 states. [2020-10-27 05:40:05,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13514 to 13511. [2020-10-27 05:40:05,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13511 states. [2020-10-27 05:40:05,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13511 states to 13511 states and 19118 transitions. [2020-10-27 05:40:05,101 INFO L78 Accepts]: Start accepts. Automaton has 13511 states and 19118 transitions. Word has length 74 [2020-10-27 05:40:05,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:40:05,102 INFO L481 AbstractCegarLoop]: Abstraction has 13511 states and 19118 transitions. [2020-10-27 05:40:05,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:40:05,102 INFO L276 IsEmpty]: Start isEmpty. Operand 13511 states and 19118 transitions. [2020-10-27 05:40:05,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:40:05,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:40:05,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:40:05,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 05:40:05,105 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:40:05,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:40:05,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1307766225, now seen corresponding path program 1 times [2020-10-27 05:40:05,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:40:05,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124203389] [2020-10-27 05:40:05,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:40:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:05,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:05,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:05,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:40:05,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:40:05,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-27 05:40:05,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:05,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:40:05,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-27 05:40:05,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 05:40:05,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:06,051 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:40:06,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:40:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:06,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:06,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:06,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:40:06,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:40:06,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:40:06,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:06,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:40:06,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:40:06,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:40:06,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:06,087 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 05:40:06,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1124203389] [2020-10-27 05:40:06,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:40:06,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:40:06,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796953353] [2020-10-27 05:40:06,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:40:06,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:40:06,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:40:06,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:40:06,089 INFO L87 Difference]: Start difference. First operand 13511 states and 19118 transitions. Second operand 6 states.