/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:30:10,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:30:10,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:30:10,692 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:30:10,693 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:30:10,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:30:10,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:30:10,708 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:30:10,711 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:30:10,718 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:30:10,720 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:30:10,722 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:30:10,723 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:30:10,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:30:10,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:30:10,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:30:10,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:30:10,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:30:10,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:30:10,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:30:10,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:30:10,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:30:10,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:30:10,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:30:10,805 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:30:10,806 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:30:10,806 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:30:10,809 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:30:10,810 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:30:10,811 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:30:10,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:30:10,812 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:30:10,815 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:30:10,816 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:30:10,818 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:30:10,818 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:30:10,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:30:10,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:30:10,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:30:10,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:30:10,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:30:10,832 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 [2020-10-28 18:30:10,889 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:30:10,890 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:30:10,894 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:30:10,895 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:30:10,895 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:30:10,895 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:30:10,896 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:30:10,896 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:30:10,896 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:30:10,897 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:30:10,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:30:10,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:30:10,899 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:30:10,899 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:30:10,899 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:30:10,900 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:30:10,900 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:30:10,900 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:30:10,901 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:30:10,901 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:30:10,901 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:30:10,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:30:10,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:30:10,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:30:10,903 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:30:10,903 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:30:10,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:30:10,904 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:30:10,904 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:30:10,904 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:30:11,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:30:11,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:30:11,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:30:11,362 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:30:11,365 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:30:11,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-28 18:30:11,457 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac8f3fe0a/3a3a740bbf304bab855cb0367e14e30d/FLAG75ee252c8 [2020-10-28 18:30:12,135 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:30:12,136 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-28 18:30:12,159 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac8f3fe0a/3a3a740bbf304bab855cb0367e14e30d/FLAG75ee252c8 [2020-10-28 18:30:12,438 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ac8f3fe0a/3a3a740bbf304bab855cb0367e14e30d [2020-10-28 18:30:12,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:30:12,449 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:30:12,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:30:12,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:30:12,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:30:12,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:30:12" (1/1) ... [2020-10-28 18:30:12,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48b4c51b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:30:12, skipping insertion in model container [2020-10-28 18:30:12,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:30:12" (1/1) ... [2020-10-28 18:30:12,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:30:12,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:30:12,751 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:30:12,775 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:30:12,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:30:12,914 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:30:12,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:30:12 WrapperNode [2020-10-28 18:30:12,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:30:12,922 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:30:12,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:30:12,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:30:12,940 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:30:12" (1/1) ... [2020-10-28 18:30:12,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:30:12" (1/1) ... [2020-10-28 18:30:12,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:30:12" (1/1) ... [2020-10-28 18:30:12,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:30:12" (1/1) ... [2020-10-28 18:30:13,008 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:30:12" (1/1) ... [2020-10-28 18:30:13,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:30:12" (1/1) ... [2020-10-28 18:30:13,031 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:30:12" (1/1) ... [2020-10-28 18:30:13,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:30:13,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:30:13,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:30:13,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:30:13,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:30:12" (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 [2020-10-28 18:30:13,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:30:13,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:30:13,154 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:30:13,154 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:30:13,155 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:30:13,155 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:30:13,155 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:30:13,155 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:30:13,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:30:13,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:30:13,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:30:13,157 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:30:13,157 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:30:13,157 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:30:13,157 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:30:13,158 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:30:13,159 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:30:13,159 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:30:13,159 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:30:13,159 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:30:13,160 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:30:13,160 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:30:13,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:30:13,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:30:13,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:30:13,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:30:13,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:30:13,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:30:14,103 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:30:14,103 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:30:14,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:30:14 BoogieIcfgContainer [2020-10-28 18:30:14,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:30:14,107 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:30:14,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:30:14,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:30:14,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:30:12" (1/3) ... [2020-10-28 18:30:14,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@454af0c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:30:14, skipping insertion in model container [2020-10-28 18:30:14,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:30:12" (2/3) ... [2020-10-28 18:30:14,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@454af0c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:30:14, skipping insertion in model container [2020-10-28 18:30:14,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:30:14" (3/3) ... [2020-10-28 18:30:14,115 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2020-10-28 18:30:14,126 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:30:14,130 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:30:14,141 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:30:14,167 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:30:14,167 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:30:14,167 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:30:14,167 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:30:14,168 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:30:14,168 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:30:14,168 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:30:14,168 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:30:14,188 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2020-10-28 18:30:14,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 18:30:14,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:14,198 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] [2020-10-28 18:30:14,198 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:14,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:14,205 INFO L82 PathProgramCache]: Analyzing trace with hash -533712479, now seen corresponding path program 1 times [2020-10-28 18:30:14,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:14,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817035635] [2020-10-28 18:30:14,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:14,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:14,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:14,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:15,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:15,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:19,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:19,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 18:30:19,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:30:19,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 18:30:19,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:19,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:19,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:30:19,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 18:30:19,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 18:30:19,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 18:30:19,884 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:30:19,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:19,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:19,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:19,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:19,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:19,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:19,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 18:30:19,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:19,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:19,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:19,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:19,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:19,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 18:30:19,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:30:19,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817035635] [2020-10-28 18:30:19,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:19,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:30:19,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369997450] [2020-10-28 18:30:19,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:30:19,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:20,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:30:20,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:30:20,023 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 4 states. [2020-10-28 18:30:20,356 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:30:20,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:20,980 INFO L93 Difference]: Finished difference Result 190 states and 301 transitions. [2020-10-28 18:30:20,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:30:20,982 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2020-10-28 18:30:20,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:20,994 INFO L225 Difference]: With dead ends: 190 [2020-10-28 18:30:20,994 INFO L226 Difference]: Without dead ends: 124 [2020-10-28 18:30:20,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:30:21,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-28 18:30:21,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2020-10-28 18:30:21,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-28 18:30:21,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 174 transitions. [2020-10-28 18:30:21,093 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 174 transitions. Word has length 52 [2020-10-28 18:30:21,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:21,095 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 174 transitions. [2020-10-28 18:30:21,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:30:21,095 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 174 transitions. [2020-10-28 18:30:21,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 18:30:21,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:21,101 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] [2020-10-28 18:30:21,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:30:21,101 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:21,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:21,104 INFO L82 PathProgramCache]: Analyzing trace with hash -98002231, now seen corresponding path program 1 times [2020-10-28 18:30:21,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:21,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704690860] [2020-10-28 18:30:21,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:21,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:21,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:21,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:21,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:21,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:26,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:26,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 18:30:26,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:30:26,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 18:30:26,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:26,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:26,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:30:26,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 18:30:26,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 18:30:26,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:30:26,441 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:30:26,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:26,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:26,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:26,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:26,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:26,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:30:26,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:26,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:26,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:26,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:26,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:26,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:26,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:30:26,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704690860] [2020-10-28 18:30:26,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:26,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:30:26,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257145112] [2020-10-28 18:30:26,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:30:26,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:26,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:30:26,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:30:26,479 INFO L87 Difference]: Start difference. First operand 121 states and 174 transitions. Second operand 4 states. [2020-10-28 18:30:26,720 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:30:27,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:27,160 INFO L93 Difference]: Finished difference Result 287 states and 436 transitions. [2020-10-28 18:30:27,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:30:27,161 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-28 18:30:27,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:27,164 INFO L225 Difference]: With dead ends: 287 [2020-10-28 18:30:27,164 INFO L226 Difference]: Without dead ends: 196 [2020-10-28 18:30:27,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:30:27,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-28 18:30:27,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 193. [2020-10-28 18:30:27,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-28 18:30:27,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 288 transitions. [2020-10-28 18:30:27,207 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 288 transitions. Word has length 53 [2020-10-28 18:30:27,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:27,208 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 288 transitions. [2020-10-28 18:30:27,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:30:27,208 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 288 transitions. [2020-10-28 18:30:27,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 18:30:27,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:27,210 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] [2020-10-28 18:30:27,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:30:27,210 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:27,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:27,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1229560517, now seen corresponding path program 1 times [2020-10-28 18:30:27,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:27,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334453353] [2020-10-28 18:30:27,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:27,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:27,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:27,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:27,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:27,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:27,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:32,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:32,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 18:30:32,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:30:32,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:30:32,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:32,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:32,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:30:32,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 18:30:32,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 18:30:32,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:32,503 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:30:32,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:32,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:32,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:32,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:32,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:32,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:30:32,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:32,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:32,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:32,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:32,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:32,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:30:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:30:32,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334453353] [2020-10-28 18:30:32,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:32,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:30:32,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981631447] [2020-10-28 18:30:32,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:30:32,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:32,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:30:32,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:30:32,571 INFO L87 Difference]: Start difference. First operand 193 states and 288 transitions. Second operand 4 states. [2020-10-28 18:30:32,848 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:30:33,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:33,343 INFO L93 Difference]: Finished difference Result 487 states and 752 transitions. [2020-10-28 18:30:33,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:30:33,347 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-28 18:30:33,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:33,352 INFO L225 Difference]: With dead ends: 487 [2020-10-28 18:30:33,353 INFO L226 Difference]: Without dead ends: 324 [2020-10-28 18:30:33,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:30:33,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2020-10-28 18:30:33,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 321. [2020-10-28 18:30:33,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-10-28 18:30:33,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 488 transitions. [2020-10-28 18:30:33,411 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 488 transitions. Word has length 54 [2020-10-28 18:30:33,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:33,412 INFO L481 AbstractCegarLoop]: Abstraction has 321 states and 488 transitions. [2020-10-28 18:30:33,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:30:33,412 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 488 transitions. [2020-10-28 18:30:33,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 18:30:33,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:33,414 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] [2020-10-28 18:30:33,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:30:33,415 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:33,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:33,415 INFO L82 PathProgramCache]: Analyzing trace with hash 501930069, now seen corresponding path program 1 times [2020-10-28 18:30:33,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:33,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365799434] [2020-10-28 18:30:33,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:33,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:33,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:33,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:33,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:34,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:38,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:38,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 18:30:38,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:30:38,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 18:30:38,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:38,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:38,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:30:38,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 18:30:38,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 18:30:38,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:30:38,779 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:30:38,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:38,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:38,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:38,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:38,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:38,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:30:38,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:38,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:38,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:38,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:38,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:38,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 18:30:38,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:30:38,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365799434] [2020-10-28 18:30:38,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:38,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:30:38,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419830399] [2020-10-28 18:30:38,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:30:38,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:38,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:30:38,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:30:38,833 INFO L87 Difference]: Start difference. First operand 321 states and 488 transitions. Second operand 4 states. [2020-10-28 18:30:39,075 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:30:39,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:39,515 INFO L93 Difference]: Finished difference Result 839 states and 1300 transitions. [2020-10-28 18:30:39,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:30:39,515 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-28 18:30:39,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:39,520 INFO L225 Difference]: With dead ends: 839 [2020-10-28 18:30:39,520 INFO L226 Difference]: Without dead ends: 548 [2020-10-28 18:30:39,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:30:39,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2020-10-28 18:30:39,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 545. [2020-10-28 18:30:39,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2020-10-28 18:30:39,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 832 transitions. [2020-10-28 18:30:39,594 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 832 transitions. Word has length 55 [2020-10-28 18:30:39,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:39,595 INFO L481 AbstractCegarLoop]: Abstraction has 545 states and 832 transitions. [2020-10-28 18:30:39,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:30:39,595 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 832 transitions. [2020-10-28 18:30:39,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 18:30:39,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:39,597 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] [2020-10-28 18:30:39,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:30:39,598 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:39,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:39,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1731586900, now seen corresponding path program 1 times [2020-10-28 18:30:39,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:39,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761469609] [2020-10-28 18:30:39,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:39,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:39,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:39,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:39,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:39,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:40,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:40,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:44,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:44,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 18:30:44,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:30:44,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:30:44,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:44,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:44,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:30:44,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:30:44,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 18:30:44,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:44,971 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:30:44,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:44,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:45,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:45,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:45,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:45,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 18:30:45,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:45,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:45,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:30:45,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:45,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:30:45,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:30:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:30:45,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761469609] [2020-10-28 18:30:45,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:45,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:30:45,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207208393] [2020-10-28 18:30:45,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:30:45,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:45,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:30:45,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:30:45,053 INFO L87 Difference]: Start difference. First operand 545 states and 832 transitions. Second operand 6 states. [2020-10-28 18:30:45,286 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 18:30:45,890 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-28 18:30:46,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:46,017 INFO L93 Difference]: Finished difference Result 1567 states and 2420 transitions. [2020-10-28 18:30:46,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:30:46,018 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-10-28 18:30:46,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:46,029 INFO L225 Difference]: With dead ends: 1567 [2020-10-28 18:30:46,029 INFO L226 Difference]: Without dead ends: 1052 [2020-10-28 18:30:46,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:30:46,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2020-10-28 18:30:46,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1049. [2020-10-28 18:30:46,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1049 states. [2020-10-28 18:30:46,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1608 transitions. [2020-10-28 18:30:46,136 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1608 transitions. Word has length 56 [2020-10-28 18:30:46,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:46,137 INFO L481 AbstractCegarLoop]: Abstraction has 1049 states and 1608 transitions. [2020-10-28 18:30:46,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:30:46,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1608 transitions. [2020-10-28 18:30:46,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 18:30:46,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:46,150 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] [2020-10-28 18:30:46,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:30:46,150 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:46,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:46,151 INFO L82 PathProgramCache]: Analyzing trace with hash -896384409, now seen corresponding path program 1 times [2020-10-28 18:30:46,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:46,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664278958] [2020-10-28 18:30:46,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:46,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:46,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:46,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:46,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:46,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:49,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:49,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 18:30:49,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:30:49,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3023 [2020-10-28 18:30:49,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:49,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:49,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:30:49,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:30:49,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 18:30:49,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:49,516 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:30:49,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:49,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:49,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:49,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:49,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:49,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:30:49,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:49,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:49,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:49,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:49,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:49,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:30:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:30:49,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664278958] [2020-10-28 18:30:49,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:49,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:30:49,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568508683] [2020-10-28 18:30:49,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:30:49,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:49,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:30:49,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:30:49,579 INFO L87 Difference]: Start difference. First operand 1049 states and 1608 transitions. Second operand 7 states. [2020-10-28 18:30:49,944 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-28 18:30:50,630 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:30:50,851 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-28 18:30:51,077 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 18:30:51,342 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-28 18:30:51,559 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:30:51,777 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:30:52,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:52,179 INFO L93 Difference]: Finished difference Result 9201 states and 14232 transitions. [2020-10-28 18:30:52,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 18:30:52,180 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-28 18:30:52,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:52,230 INFO L225 Difference]: With dead ends: 9201 [2020-10-28 18:30:52,230 INFO L226 Difference]: Without dead ends: 8182 [2020-10-28 18:30:52,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-28 18:30:52,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8182 states. [2020-10-28 18:30:52,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8182 to 2065. [2020-10-28 18:30:52,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2065 states. [2020-10-28 18:30:52,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 3120 transitions. [2020-10-28 18:30:52,498 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 3120 transitions. Word has length 56 [2020-10-28 18:30:52,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:52,498 INFO L481 AbstractCegarLoop]: Abstraction has 2065 states and 3120 transitions. [2020-10-28 18:30:52,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:30:52,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 3120 transitions. [2020-10-28 18:30:52,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:30:52,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:52,500 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] [2020-10-28 18:30:52,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:30:52,500 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:52,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:52,501 INFO L82 PathProgramCache]: Analyzing trace with hash -60653524, now seen corresponding path program 1 times [2020-10-28 18:30:52,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:52,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80094103] [2020-10-28 18:30:52,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:52,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:52,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:52,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:52,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:52,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:52,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:53,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:55,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:55,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:30:55,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 18:30:55,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2601 [2020-10-28 18:30:55,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:55,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:55,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:30:55,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 18:30:55,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 18:30:55,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:55,336 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:30:55,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:55,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:55,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:55,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:55,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:55,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:30:55,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:55,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:55,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:55,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:55,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:55,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:55,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:30:55,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80094103] [2020-10-28 18:30:55,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:55,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:30:55,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991681270] [2020-10-28 18:30:55,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:30:55,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:55,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:30:55,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:30:55,374 INFO L87 Difference]: Start difference. First operand 2065 states and 3120 transitions. Second operand 4 states. [2020-10-28 18:30:55,579 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 18:30:56,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:30:56,154 INFO L93 Difference]: Finished difference Result 5073 states and 7678 transitions. [2020-10-28 18:30:56,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:30:56,155 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-28 18:30:56,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:30:56,172 INFO L225 Difference]: With dead ends: 5073 [2020-10-28 18:30:56,172 INFO L226 Difference]: Without dead ends: 3038 [2020-10-28 18:30:56,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:30:56,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3038 states. [2020-10-28 18:30:56,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3038 to 3035. [2020-10-28 18:30:56,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3035 states. [2020-10-28 18:30:56,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3035 states to 3035 states and 4538 transitions. [2020-10-28 18:30:56,427 INFO L78 Accepts]: Start accepts. Automaton has 3035 states and 4538 transitions. Word has length 58 [2020-10-28 18:30:56,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:30:56,428 INFO L481 AbstractCegarLoop]: Abstraction has 3035 states and 4538 transitions. [2020-10-28 18:30:56,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:30:56,429 INFO L276 IsEmpty]: Start isEmpty. Operand 3035 states and 4538 transitions. [2020-10-28 18:30:56,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 18:30:56,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:30:56,431 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] [2020-10-28 18:30:56,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:30:56,432 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:30:56,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:30:56,432 INFO L82 PathProgramCache]: Analyzing trace with hash 560876109, now seen corresponding path program 1 times [2020-10-28 18:30:56,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:30:56,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [620652529] [2020-10-28 18:30:56,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:30:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:56,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:56,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:56,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:56,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:59,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:59,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 18:30:59,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:30:59,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2735 [2020-10-28 18:30:59,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:59,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:59,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:30:59,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:30:59,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 18:30:59,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:59,512 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:30:59,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:30:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:30:59,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:30:59,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:30:59,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:30:59,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:30:59,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:30:59,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:30:59,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:30:59,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:30:59,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:30:59,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:30:59,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:30:59,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:30:59,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [620652529] [2020-10-28 18:30:59,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:30:59,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:30:59,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680715115] [2020-10-28 18:30:59,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:30:59,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:30:59,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:30:59,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:30:59,558 INFO L87 Difference]: Start difference. First operand 3035 states and 4538 transitions. Second operand 7 states. [2020-10-28 18:30:59,878 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:31:00,636 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-28 18:31:00,881 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 18:31:01,095 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:31:01,406 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 18:31:01,624 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-28 18:31:01,826 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:31:02,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:02,436 INFO L93 Difference]: Finished difference Result 14091 states and 21154 transitions. [2020-10-28 18:31:02,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 18:31:02,436 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2020-10-28 18:31:02,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:02,498 INFO L225 Difference]: With dead ends: 14091 [2020-10-28 18:31:02,498 INFO L226 Difference]: Without dead ends: 11088 [2020-10-28 18:31:02,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-10-28 18:31:02,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11088 states. [2020-10-28 18:31:02,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11088 to 3035. [2020-10-28 18:31:02,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3035 states. [2020-10-28 18:31:02,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3035 states to 3035 states and 4490 transitions. [2020-10-28 18:31:02,879 INFO L78 Accepts]: Start accepts. Automaton has 3035 states and 4490 transitions. Word has length 58 [2020-10-28 18:31:02,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:31:02,880 INFO L481 AbstractCegarLoop]: Abstraction has 3035 states and 4490 transitions. [2020-10-28 18:31:02,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:31:02,880 INFO L276 IsEmpty]: Start isEmpty. Operand 3035 states and 4490 transitions. [2020-10-28 18:31:02,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:31:02,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:31:02,881 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] [2020-10-28 18:31:02,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:31:02,882 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:31:02,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:31:02,882 INFO L82 PathProgramCache]: Analyzing trace with hash 147958892, now seen corresponding path program 1 times [2020-10-28 18:31:02,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:31:02,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6396687] [2020-10-28 18:31:02,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:31:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:02,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:02,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:03,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:03,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:04,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:04,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:31:04,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 18:31:04,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1774 [2020-10-28 18:31:04,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:04,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:04,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:31:04,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:31:04,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 18:31:04,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:04,912 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:31:04,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:31:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:04,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:04,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:04,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:31:04,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:31:04,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 18:31:04,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:04,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:04,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:31:04,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:31:04,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:31:04,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:04,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:31:04,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6396687] [2020-10-28 18:31:04,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:31:04,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:31:04,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251424405] [2020-10-28 18:31:04,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:31:04,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:31:04,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:31:04,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:31:04,962 INFO L87 Difference]: Start difference. First operand 3035 states and 4490 transitions. Second operand 6 states. [2020-10-28 18:31:05,202 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 18:31:05,858 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-28 18:31:06,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:06,260 INFO L93 Difference]: Finished difference Result 8993 states and 13310 transitions. [2020-10-28 18:31:06,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:31:06,261 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-28 18:31:06,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:06,278 INFO L225 Difference]: With dead ends: 8993 [2020-10-28 18:31:06,279 INFO L226 Difference]: Without dead ends: 5990 [2020-10-28 18:31:06,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:31:06,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5990 states. [2020-10-28 18:31:06,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5990 to 5987. [2020-10-28 18:31:06,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5987 states. [2020-10-28 18:31:06,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5987 states to 5987 states and 8802 transitions. [2020-10-28 18:31:06,884 INFO L78 Accepts]: Start accepts. Automaton has 5987 states and 8802 transitions. Word has length 59 [2020-10-28 18:31:06,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:31:06,884 INFO L481 AbstractCegarLoop]: Abstraction has 5987 states and 8802 transitions. [2020-10-28 18:31:06,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:31:06,884 INFO L276 IsEmpty]: Start isEmpty. Operand 5987 states and 8802 transitions. [2020-10-28 18:31:06,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:31:06,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:31:06,885 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] [2020-10-28 18:31:06,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:31:06,886 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:31:06,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:31:06,886 INFO L82 PathProgramCache]: Analyzing trace with hash -176363887, now seen corresponding path program 1 times [2020-10-28 18:31:06,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:31:06,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715812732] [2020-10-28 18:31:06,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:31:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:06,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:06,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:07,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:07,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:31:07,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:31:07,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 299 [2020-10-28 18:31:07,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:07,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:07,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:31:07,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:31:07,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 18:31:07,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:07,443 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:31:07,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:31:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:07,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:07,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:07,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:31:07,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:31:07,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 18:31:07,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:07,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:07,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:31:07,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:31:07,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:31:07,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:31:07,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715812732] [2020-10-28 18:31:07,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:31:07,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:31:07,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125052032] [2020-10-28 18:31:07,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:31:07,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:31:07,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:31:07,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:31:07,489 INFO L87 Difference]: Start difference. First operand 5987 states and 8802 transitions. Second operand 6 states. [2020-10-28 18:31:07,753 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 18:31:08,430 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-28 18:31:09,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:09,024 INFO L93 Difference]: Finished difference Result 15913 states and 23462 transitions. [2020-10-28 18:31:09,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:31:09,024 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-28 18:31:09,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:09,048 INFO L225 Difference]: With dead ends: 15913 [2020-10-28 18:31:09,049 INFO L226 Difference]: Without dead ends: 9958 [2020-10-28 18:31:09,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:31:09,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9958 states. [2020-10-28 18:31:09,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9958 to 9955. [2020-10-28 18:31:09,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9955 states. [2020-10-28 18:31:09,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9955 states to 9955 states and 14562 transitions. [2020-10-28 18:31:09,802 INFO L78 Accepts]: Start accepts. Automaton has 9955 states and 14562 transitions. Word has length 59 [2020-10-28 18:31:09,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:31:09,802 INFO L481 AbstractCegarLoop]: Abstraction has 9955 states and 14562 transitions. [2020-10-28 18:31:09,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:31:09,803 INFO L276 IsEmpty]: Start isEmpty. Operand 9955 states and 14562 transitions. [2020-10-28 18:31:09,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 18:31:09,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:31:09,803 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] [2020-10-28 18:31:09,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:31:09,804 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:31:09,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:31:09,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1944664972, now seen corresponding path program 1 times [2020-10-28 18:31:09,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:31:09,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995658998] [2020-10-28 18:31:09,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:31:09,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:09,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:10,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:10,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 18:31:10,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:31:10,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-28 18:31:10,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:10,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:10,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:31:10,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-28 18:31:10,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 18:31:10,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:10,310 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:31:10,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:31:10,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:10,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:10,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:10,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:31:10,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:31:10,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:31:10,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:10,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:10,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:31:10,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:31:10,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:31:10,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:31:10,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995658998] [2020-10-28 18:31:10,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:31:10,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:31:10,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220002323] [2020-10-28 18:31:10,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:31:10,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:31:10,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:31:10,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:31:10,355 INFO L87 Difference]: Start difference. First operand 9955 states and 14562 transitions. Second operand 5 states. [2020-10-28 18:31:12,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:12,027 INFO L93 Difference]: Finished difference Result 18962 states and 27577 transitions. [2020-10-28 18:31:12,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:31:12,028 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2020-10-28 18:31:12,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:12,075 INFO L225 Difference]: With dead ends: 18962 [2020-10-28 18:31:12,075 INFO L226 Difference]: Without dead ends: 18959 [2020-10-28 18:31:12,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:31:12,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18959 states. [2020-10-28 18:31:13,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18959 to 10467. [2020-10-28 18:31:13,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10467 states. [2020-10-28 18:31:13,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10467 states to 10467 states and 15042 transitions. [2020-10-28 18:31:13,222 INFO L78 Accepts]: Start accepts. Automaton has 10467 states and 15042 transitions. Word has length 59 [2020-10-28 18:31:13,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:31:13,222 INFO L481 AbstractCegarLoop]: Abstraction has 10467 states and 15042 transitions. [2020-10-28 18:31:13,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:31:13,222 INFO L276 IsEmpty]: Start isEmpty. Operand 10467 states and 15042 transitions. [2020-10-28 18:31:13,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 18:31:13,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:31:13,226 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:31:13,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:31:13,227 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:31:13,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:31:13,227 INFO L82 PathProgramCache]: Analyzing trace with hash -578073059, now seen corresponding path program 1 times [2020-10-28 18:31:13,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:31:13,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379074503] [2020-10-28 18:31:13,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:31:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:13,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:13,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:13,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:13,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:13,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:15,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:15,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:15,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:15,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:15,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:16,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:16,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:16,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:18,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:18,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 18:31:18,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:31:18,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:31:18,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:18,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:18,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:31:18,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:31:18,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-28 18:31:18,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:18,506 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:31:18,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:31:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:18,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:18,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:18,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:31:18,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:31:18,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:31:18,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:18,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:18,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:31:18,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:31:18,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:31:18,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 18:31:18,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379074503] [2020-10-28 18:31:18,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:31:18,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 18:31:18,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093774327] [2020-10-28 18:31:18,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:31:18,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:31:18,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:31:18,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:31:18,548 INFO L87 Difference]: Start difference. First operand 10467 states and 15042 transitions. Second operand 7 states. [2020-10-28 18:31:18,814 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 18:31:19,678 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:31:19,936 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 18:31:20,310 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-28 18:31:20,565 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:31:20,835 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:31:24,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:24,529 INFO L93 Difference]: Finished difference Result 62544 states and 90253 transitions. [2020-10-28 18:31:24,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 18:31:24,530 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 81 [2020-10-28 18:31:24,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:24,656 INFO L225 Difference]: With dead ends: 62544 [2020-10-28 18:31:24,656 INFO L226 Difference]: Without dead ends: 52109 [2020-10-28 18:31:24,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:31:24,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52109 states. [2020-10-28 18:31:27,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52109 to 25267. [2020-10-28 18:31:27,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25267 states. [2020-10-28 18:31:27,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25267 states to 25267 states and 36082 transitions. [2020-10-28 18:31:27,264 INFO L78 Accepts]: Start accepts. Automaton has 25267 states and 36082 transitions. Word has length 81 [2020-10-28 18:31:27,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:31:27,265 INFO L481 AbstractCegarLoop]: Abstraction has 25267 states and 36082 transitions. [2020-10-28 18:31:27,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:31:27,265 INFO L276 IsEmpty]: Start isEmpty. Operand 25267 states and 36082 transitions. [2020-10-28 18:31:27,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 18:31:27,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:31:27,269 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:31:27,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:31:27,269 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:31:27,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:31:27,270 INFO L82 PathProgramCache]: Analyzing trace with hash 158028823, now seen corresponding path program 1 times [2020-10-28 18:31:27,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:31:27,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782176786] [2020-10-28 18:31:27,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:31:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:27,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:27,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:27,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:27,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:28,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:28,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:28,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:32,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:32,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 18:31:32,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 18:31:32,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:31:32,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:32,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:32,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:31:32,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:31:32,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-28 18:31:32,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:32,551 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:31:32,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:31:32,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:32,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:32,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:32,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:31:32,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:31:32,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 18:31:32,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:32,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:32,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:31:32,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:31:32,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:31:32,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 18:31:32,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782176786] [2020-10-28 18:31:32,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:31:32,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 18:31:32,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93762437] [2020-10-28 18:31:32,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:31:32,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:31:32,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:31:32,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:31:32,588 INFO L87 Difference]: Start difference. First operand 25267 states and 36082 transitions. Second operand 7 states. [2020-10-28 18:31:32,859 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 18:31:33,629 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 18:31:33,948 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:31:34,181 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-28 18:31:34,411 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:31:34,631 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:31:39,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:39,571 INFO L93 Difference]: Finished difference Result 83492 states and 119156 transitions. [2020-10-28 18:31:39,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 18:31:39,571 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 81 [2020-10-28 18:31:39,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:39,682 INFO L225 Difference]: With dead ends: 83492 [2020-10-28 18:31:39,683 INFO L226 Difference]: Without dead ends: 68689 [2020-10-28 18:31:39,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:31:39,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68689 states. [2020-10-28 18:31:44,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68689 to 40931. [2020-10-28 18:31:44,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40931 states. [2020-10-28 18:31:44,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40931 states to 40931 states and 58210 transitions. [2020-10-28 18:31:44,315 INFO L78 Accepts]: Start accepts. Automaton has 40931 states and 58210 transitions. Word has length 81 [2020-10-28 18:31:44,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:31:44,315 INFO L481 AbstractCegarLoop]: Abstraction has 40931 states and 58210 transitions. [2020-10-28 18:31:44,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:31:44,316 INFO L276 IsEmpty]: Start isEmpty. Operand 40931 states and 58210 transitions. [2020-10-28 18:31:44,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 18:31:44,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:31:44,319 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:31:44,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:31:44,320 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:31:44,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:31:44,320 INFO L82 PathProgramCache]: Analyzing trace with hash 758526115, now seen corresponding path program 1 times [2020-10-28 18:31:44,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:31:44,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011866310] [2020-10-28 18:31:44,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:31:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:44,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:44,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:44,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:44,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:44,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:47,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:47,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:47,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:47,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:48,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:48,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:48,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:49,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:49,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:49,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:49,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 18:31:49,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:31:49,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:31:49,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:49,453 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:49,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:31:49,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:31:49,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-28 18:31:49,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:31:49,721 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:31:49,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:31:49,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:31:49,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:31:49,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:31:49,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:31:49,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:31:49,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 18:31:49,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:31:49,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:31:49,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:31:49,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:31:49,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:31:49,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:31:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 18:31:49,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011866310] [2020-10-28 18:31:49,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:31:49,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 18:31:49,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352950922] [2020-10-28 18:31:49,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:31:49,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:31:49,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:31:49,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:31:49,752 INFO L87 Difference]: Start difference. First operand 40931 states and 58210 transitions. Second operand 7 states. [2020-10-28 18:31:50,027 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 18:31:51,013 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 18:31:51,243 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:31:51,480 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-28 18:31:51,711 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-28 18:31:51,962 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-28 18:31:58,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:31:58,403 INFO L93 Difference]: Finished difference Result 95128 states and 135653 transitions. [2020-10-28 18:31:58,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 18:31:58,403 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 81 [2020-10-28 18:31:58,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:31:58,506 INFO L225 Difference]: With dead ends: 95128 [2020-10-28 18:31:58,506 INFO L226 Difference]: Without dead ends: 80325 [2020-10-28 18:31:58,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:31:58,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80325 states. [2020-10-28 18:32:03,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80325 to 51363. [2020-10-28 18:32:03,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51363 states. [2020-10-28 18:32:04,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51363 states to 51363 states and 73058 transitions. [2020-10-28 18:32:04,065 INFO L78 Accepts]: Start accepts. Automaton has 51363 states and 73058 transitions. Word has length 81 [2020-10-28 18:32:04,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:32:04,065 INFO L481 AbstractCegarLoop]: Abstraction has 51363 states and 73058 transitions. [2020-10-28 18:32:04,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:32:04,065 INFO L276 IsEmpty]: Start isEmpty. Operand 51363 states and 73058 transitions. [2020-10-28 18:32:04,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-28 18:32:04,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:32:04,071 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:32:04,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:32:04,071 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:32:04,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:32:04,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1604975529, now seen corresponding path program 1 times [2020-10-28 18:32:04,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:32:04,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704436506] [2020-10-28 18:32:04,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:32:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:32:04,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:04,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:04,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:04,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:04,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:04,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:04,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:05,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:05,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:05,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:05,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:06,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:09,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:32:09,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 18:32:09,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:32:09,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:32:09,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:32:09,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:32:09,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:32:09,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:32:09,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-28 18:32:09,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:32:09,321 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:32:09,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:32:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:32:09,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:09,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:32:09,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:32:09,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:32:09,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 18:32:09,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:32:09,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:32:09,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:32:09,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:32:09,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:32:09,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:32:09,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:32:09,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704436506] [2020-10-28 18:32:09,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:32:09,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 18:32:09,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454356221] [2020-10-28 18:32:09,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:32:09,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:32:09,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:32:09,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:32:09,351 INFO L87 Difference]: Start difference. First operand 51363 states and 73058 transitions. Second operand 6 states. [2020-10-28 18:32:09,610 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-28 18:32:10,449 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-28 18:32:10,670 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-28 18:32:16,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:32:16,830 INFO L93 Difference]: Finished difference Result 83854 states and 120015 transitions. [2020-10-28 18:32:16,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 18:32:16,831 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 81 [2020-10-28 18:32:16,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:32:16,918 INFO L225 Difference]: With dead ends: 83854 [2020-10-28 18:32:16,918 INFO L226 Difference]: Without dead ends: 71851 [2020-10-28 18:32:16,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-28 18:32:16,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71851 states. [2020-10-28 18:32:23,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71851 to 68387. [2020-10-28 18:32:23,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68387 states. [2020-10-28 18:32:23,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68387 states to 68387 states and 98018 transitions. [2020-10-28 18:32:23,824 INFO L78 Accepts]: Start accepts. Automaton has 68387 states and 98018 transitions. Word has length 81 [2020-10-28 18:32:23,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:32:23,825 INFO L481 AbstractCegarLoop]: Abstraction has 68387 states and 98018 transitions. [2020-10-28 18:32:23,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:32:23,825 INFO L276 IsEmpty]: Start isEmpty. Operand 68387 states and 98018 transitions. [2020-10-28 18:32:23,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 18:32:23,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:32:23,831 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:32:23,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 18:32:23,831 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:32:23,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:32:23,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1930326321, now seen corresponding path program 1 times [2020-10-28 18:32:23,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:32:23,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380782430] [2020-10-28 18:32:23,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:32:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:32:23,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:23,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:24,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:24,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:24,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:24,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:24,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:25,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:25,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:26,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:26,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:28,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:32:28,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 18:32:28,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:32:28,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 18:32:28,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:32:28,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:32:28,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 18:32:28,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:32:28,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 18:32:28,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:32:29,277 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:32:29,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:32:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:32:29,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:32:29,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:32:29,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:32:29,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:32:29,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 18:32:29,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:32:29,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:32:29,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:32:29,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:32:29,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:32:29,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:32:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:32:29,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380782430] [2020-10-28 18:32:29,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:32:29,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 18:32:29,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853993858] [2020-10-28 18:32:29,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 18:32:29,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:32:29,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 18:32:29,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-28 18:32:29,337 INFO L87 Difference]: Start difference. First operand 68387 states and 98018 transitions. Second operand 11 states. [2020-10-28 18:32:29,672 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-28 18:32:32,354 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 18:32:32,855 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 18:32:33,350 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 152 [2020-10-28 18:33:06,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:33:06,611 INFO L93 Difference]: Finished difference Result 361082 states and 512934 transitions. [2020-10-28 18:33:06,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 18:33:06,611 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 82 [2020-10-28 18:33:06,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:33:07,452 INFO L225 Difference]: With dead ends: 361082 [2020-10-28 18:33:07,453 INFO L226 Difference]: Without dead ends: 292727 [2020-10-28 18:33:07,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=329, Invalid=931, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 18:33:07,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292727 states. [2020-10-28 18:33:29,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292727 to 164783. [2020-10-28 18:33:29,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164783 states. [2020-10-28 18:33:29,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164783 states to 164783 states and 233302 transitions. [2020-10-28 18:33:29,616 INFO L78 Accepts]: Start accepts. Automaton has 164783 states and 233302 transitions. Word has length 82 [2020-10-28 18:33:29,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:33:29,617 INFO L481 AbstractCegarLoop]: Abstraction has 164783 states and 233302 transitions. [2020-10-28 18:33:29,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 18:33:29,617 INFO L276 IsEmpty]: Start isEmpty. Operand 164783 states and 233302 transitions. [2020-10-28 18:33:29,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 18:33:29,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:33:29,636 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:33:29,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 18:33:29,636 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:33:29,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:33:29,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1123788428, now seen corresponding path program 1 times [2020-10-28 18:33:29,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:33:29,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330878895] [2020-10-28 18:33:29,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:33:29,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:33:29,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:29,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:29,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:29,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:30,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:31,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:31,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:32,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:33,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:34,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:34,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:34,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:34,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:34,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:33:34,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 18:33:34,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:33:34,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 18:33:34,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:33:34,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:33:34,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 18:33:34,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:33:34,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 18:33:34,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:33:34,903 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 23 [2020-10-28 18:33:35,174 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-28 18:33:35,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:33:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:33:35,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:33:35,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:33:35,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:33:35,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:33:35,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:33:35,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:33:35,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:33:35,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:33:35,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:33:35,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:33:35,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:33:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:33:35,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330878895] [2020-10-28 18:33:35,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 18:33:35,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 18:33:35,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016122995] [2020-10-28 18:33:35,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 18:33:35,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:33:35,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 18:33:35,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-28 18:33:35,212 INFO L87 Difference]: Start difference. First operand 164783 states and 233302 transitions. Second operand 11 states. [2020-10-28 18:33:35,528 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 18:33:39,833 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 18:33:40,189 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-28 18:33:40,503 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 18:33:40,791 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-28 18:33:41,050 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 147