/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/eca-rers2012/Problem19_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:13:00,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:13:00,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:13:00,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:13:00,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:13:00,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:13:00,792 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:13:00,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:13:00,799 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:13:00,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:13:00,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:13:00,804 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:13:00,805 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:13:00,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:13:00,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:13:00,810 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:13:00,812 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:13:00,813 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:13:00,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:13:00,818 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:13:00,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:13:00,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:13:00,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:13:00,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:13:00,831 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:13:00,855 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:13:00,855 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:13:00,857 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:13:00,858 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:13:00,860 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:13:00,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:13:00,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:13:00,864 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:13:00,865 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:13:00,868 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:13:00,868 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:13:00,869 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:13:00,870 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:13:00,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:13:00,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:13:00,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:13:00,873 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 14:13:00,908 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:13:00,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:13:00,910 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:13:00,911 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:13:00,911 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:13:00,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:13:00,911 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:13:00,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:13:00,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:13:00,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:13:00,912 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:13:00,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:13:00,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:13:00,913 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:13:00,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:13:00,913 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:13:00,914 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:13:00,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:13:00,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:13:00,915 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:13:00,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:13:00,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:13:00,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:13:00,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:13:00,916 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:13:00,916 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:13:00,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:13:00,916 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:13:00,916 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:13:00,917 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:13:01,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:13:01,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:13:01,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:13:01,463 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:13:01,464 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:13:01,465 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label39.c [2020-10-28 14:13:01,586 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a19c5f1b/5816fed763a94104b716ef018fa356d6/FLAG09e3b90e6 [2020-10-28 14:13:03,214 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:13:03,215 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label39.c [2020-10-28 14:13:03,258 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a19c5f1b/5816fed763a94104b716ef018fa356d6/FLAG09e3b90e6 [2020-10-28 14:13:03,300 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0a19c5f1b/5816fed763a94104b716ef018fa356d6 [2020-10-28 14:13:03,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:13:03,315 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:13:03,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:13:03,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:13:03,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:13:03,327 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:13:03" (1/1) ... [2020-10-28 14:13:03,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a5d40e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:13:03, skipping insertion in model container [2020-10-28 14:13:03,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:13:03" (1/1) ... [2020-10-28 14:13:03,343 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:13:03,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:13:06,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:13:06,288 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:13:07,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:13:07,783 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:13:07,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:13:07 WrapperNode [2020-10-28 14:13:07,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:13:07,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:13:07,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:13:07,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:13:07,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:13:07" (1/1) ... [2020-10-28 14:13:07,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:13:07" (1/1) ... [2020-10-28 14:13:07,995 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:13:07" (1/1) ... [2020-10-28 14:13:07,996 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:13:07" (1/1) ... [2020-10-28 14:13:08,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:13:07" (1/1) ... [2020-10-28 14:13:08,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:13:07" (1/1) ... [2020-10-28 14:13:08,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:13:07" (1/1) ... [2020-10-28 14:13:08,751 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:13:08,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:13:08,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:13:08,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:13:08,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:13:07" (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 14:13:08,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:13:08,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:13:08,850 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:13:08,850 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 14:13:08,850 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 14:13:08,851 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 14:13:08,851 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 14:13:08,851 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 14:13:08,851 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-28 14:13:08,851 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:13:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 14:13:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 14:13:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 14:13:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 14:13:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 14:13:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-28 14:13:08,852 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:13:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:13:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:13:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:13:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:13:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:13:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:13:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:13:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:13:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:13:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:13:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:13:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:13:23,966 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:13:23,967 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:13:23,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:13:23 BoogieIcfgContainer [2020-10-28 14:13:23,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:13:23,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:13:23,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:13:23,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:13:23,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:13:03" (1/3) ... [2020-10-28 14:13:23,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c91a9e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:13:23, skipping insertion in model container [2020-10-28 14:13:23,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:13:07" (2/3) ... [2020-10-28 14:13:23,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c91a9e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:13:23, skipping insertion in model container [2020-10-28 14:13:23,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:13:23" (3/3) ... [2020-10-28 14:13:23,982 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label39.c [2020-10-28 14:13:23,997 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:13:24,004 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:13:24,020 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:13:24,061 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:13:24,062 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:13:24,062 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:13:24,062 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:13:24,062 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:13:24,062 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:13:24,062 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:13:24,062 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:13:24,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-28 14:13:24,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:13:24,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:13:24,125 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] [2020-10-28 14:13:24,125 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:13:24,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:13:24,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1492854227, now seen corresponding path program 1 times [2020-10-28 14:13:24,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:13:24,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754770497] [2020-10-28 14:13:24,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:13:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:13:24,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:13:24,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:13:24,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:13:24,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:13:24,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 580 [2020-10-28 14:13:24,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:13:24,989 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:13:24,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:13:24,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:13:24,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 14:13:24,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:13:25,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:13:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:13:25,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:13:25,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:13:25,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:13:25,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:13:25,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 14:13:25,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:13:25,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:13:25,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:13:25,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:13:25,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:13:25,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:13:25,217 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 14:13:25,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754770497] [2020-10-28 14:13:25,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:13:25,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:13:25,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483217407] [2020-10-28 14:13:25,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:13:25,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:13:25,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:13:25,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:13:25,249 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 5 states. [2020-10-28 14:13:58,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:13:58,356 INFO L93 Difference]: Finished difference Result 5092 states and 9568 transitions. [2020-10-28 14:13:58,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:13:58,360 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-10-28 14:13:58,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:13:58,411 INFO L225 Difference]: With dead ends: 5092 [2020-10-28 14:13:58,411 INFO L226 Difference]: Without dead ends: 3247 [2020-10-28 14:13:58,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:13:58,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2020-10-28 14:13:58,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 3180. [2020-10-28 14:13:58,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3180 states. [2020-10-28 14:13:58,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3180 states to 3180 states and 5851 transitions. [2020-10-28 14:13:58,708 INFO L78 Accepts]: Start accepts. Automaton has 3180 states and 5851 transitions. Word has length 38 [2020-10-28 14:13:58,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:13:58,710 INFO L481 AbstractCegarLoop]: Abstraction has 3180 states and 5851 transitions. [2020-10-28 14:13:58,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:13:58,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3180 states and 5851 transitions. [2020-10-28 14:13:58,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 14:13:58,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:13:58,723 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:13:58,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:13:58,723 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:13:58,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:13:58,724 INFO L82 PathProgramCache]: Analyzing trace with hash -134453990, now seen corresponding path program 1 times [2020-10-28 14:13:58,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:13:58,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514972816] [2020-10-28 14:13:58,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:13:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:13:58,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:13:59,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:13:59,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:14:00,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:14:00,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-28 14:14:00,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:14:00,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1451 [2020-10-28 14:14:00,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:14:00,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:14:00,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:14:00,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-28 14:14:00,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:14:00,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:14:00,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:14:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:14:00,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:14:00,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:14:00,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:14:00,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:14:00,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:14:00,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:14:00,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:14:00,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:14:00,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:14:00,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:14:00,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:14:00,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:14:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:14:00,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:14:00,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:14:00,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 14:14:00,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:14:00,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-28 14:14:00,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:14:00,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:14:00,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:14:00,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-28 14:14:00,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:14:00,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:14:00,746 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:14:00,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514972816] [2020-10-28 14:14:00,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:14:00,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:14:00,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006323753] [2020-10-28 14:14:00,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:14:00,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:14:00,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:14:00,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:14:00,750 INFO L87 Difference]: Start difference. First operand 3180 states and 5851 transitions. Second operand 5 states. [2020-10-28 14:14:37,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:14:37,149 INFO L93 Difference]: Finished difference Result 9275 states and 17288 transitions. [2020-10-28 14:14:37,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:14:37,153 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 109 [2020-10-28 14:14:37,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:14:37,203 INFO L225 Difference]: With dead ends: 9275 [2020-10-28 14:14:37,203 INFO L226 Difference]: Without dead ends: 6101 [2020-10-28 14:14:37,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:14:37,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6101 states. [2020-10-28 14:14:37,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6101 to 6035. [2020-10-28 14:14:37,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6035 states. [2020-10-28 14:14:37,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6035 states to 6035 states and 10315 transitions. [2020-10-28 14:14:37,509 INFO L78 Accepts]: Start accepts. Automaton has 6035 states and 10315 transitions. Word has length 109 [2020-10-28 14:14:37,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:14:37,512 INFO L481 AbstractCegarLoop]: Abstraction has 6035 states and 10315 transitions. [2020-10-28 14:14:37,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:14:37,512 INFO L276 IsEmpty]: Start isEmpty. Operand 6035 states and 10315 transitions. [2020-10-28 14:14:37,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-28 14:14:37,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:14:37,526 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:14:37,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:14:37,526 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:14:37,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:14:37,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1540518773, now seen corresponding path program 1 times [2020-10-28 14:14:37,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:14:37,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017424366] [2020-10-28 14:14:37,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:14:37,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:14:37,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:14:38,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:14:38,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:14:38,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-28 14:14:38,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:14:38,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 938 [2020-10-28 14:14:38,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:14:38,548 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:14:38,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:14:38,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:14:38,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 14:14:38,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:14:38,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:14:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:14:38,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:14:38,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:14:38,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:14:38,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:14:38,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 14:14:38,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:14:38,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:14:38,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:14:38,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:14:38,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:14:38,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:14:38,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:14:38,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:14:38,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:14:39,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:14:39,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 14:14:39,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:14:39,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-28 14:14:39,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:14:39,087 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:14:39,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:14:39,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:14:39,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 14:14:39,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:14:39,231 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:14:39,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017424366] [2020-10-28 14:14:39,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:14:39,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:14:39,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769133412] [2020-10-28 14:14:39,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:14:39,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:14:39,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:14:39,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:14:39,238 INFO L87 Difference]: Start difference. First operand 6035 states and 10315 transitions. Second operand 7 states. [2020-10-28 14:14:39,406 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 14:15:32,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:15:32,483 INFO L93 Difference]: Finished difference Result 16728 states and 28677 transitions. [2020-10-28 14:15:32,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:15:32,486 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 114 [2020-10-28 14:15:32,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:15:32,559 INFO L225 Difference]: With dead ends: 16728 [2020-10-28 14:15:32,559 INFO L226 Difference]: Without dead ends: 10699 [2020-10-28 14:15:32,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:15:32,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10699 states. [2020-10-28 14:15:32,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10699 to 10522. [2020-10-28 14:15:32,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10522 states. [2020-10-28 14:15:32,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10522 states to 10522 states and 15784 transitions. [2020-10-28 14:15:32,989 INFO L78 Accepts]: Start accepts. Automaton has 10522 states and 15784 transitions. Word has length 114 [2020-10-28 14:15:32,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:15:32,992 INFO L481 AbstractCegarLoop]: Abstraction has 10522 states and 15784 transitions. [2020-10-28 14:15:32,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:15:32,992 INFO L276 IsEmpty]: Start isEmpty. Operand 10522 states and 15784 transitions. [2020-10-28 14:15:33,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-28 14:15:33,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:15:33,006 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:15:33,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:15:33,007 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:15:33,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:15:33,008 INFO L82 PathProgramCache]: Analyzing trace with hash -2141200807, now seen corresponding path program 1 times [2020-10-28 14:15:33,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:15:33,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348261074] [2020-10-28 14:15:33,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:15:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:15:33,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:33,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:34,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:34,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:34,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:35,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:15:35,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-28 14:15:35,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:15:35,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2663 [2020-10-28 14:15:35,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:15:35,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:15:35,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:15:35,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:15:35,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 14:15:35,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:15:35,910 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:15:35,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:15:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:15:35,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:35,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:15:35,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:15:35,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:15:35,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 14:15:35,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:15:35,937 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:15:35,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:15:35,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:15:35,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:15:35,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:15:35,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:15:36,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:15:36,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:36,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:15:36,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 14:15:36,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:15:36,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-28 14:15:36,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:15:36,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:15:36,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:15:36,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:15:36,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-28 14:15:36,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:15:36,307 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:15:36,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348261074] [2020-10-28 14:15:36,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:15:36,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:15:36,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199463758] [2020-10-28 14:15:36,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:15:36,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:15:36,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:15:36,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:15:36,324 INFO L87 Difference]: Start difference. First operand 10522 states and 15784 transitions. Second operand 7 states. [2020-10-28 14:15:36,553 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 14:15:38,927 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 14:16:52,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:16:52,769 INFO L93 Difference]: Finished difference Result 30361 states and 47229 transitions. [2020-10-28 14:16:52,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:16:52,776 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 124 [2020-10-28 14:16:52,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:16:52,882 INFO L225 Difference]: With dead ends: 30361 [2020-10-28 14:16:52,882 INFO L226 Difference]: Without dead ends: 19845 [2020-10-28 14:16:52,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:16:52,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19845 states. [2020-10-28 14:16:53,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19845 to 19427. [2020-10-28 14:16:53,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19427 states. [2020-10-28 14:16:53,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19427 states to 19427 states and 26537 transitions. [2020-10-28 14:16:53,716 INFO L78 Accepts]: Start accepts. Automaton has 19427 states and 26537 transitions. Word has length 124 [2020-10-28 14:16:53,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:16:53,719 INFO L481 AbstractCegarLoop]: Abstraction has 19427 states and 26537 transitions. [2020-10-28 14:16:53,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:16:53,719 INFO L276 IsEmpty]: Start isEmpty. Operand 19427 states and 26537 transitions. [2020-10-28 14:16:53,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-28 14:16:53,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:16:53,723 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:16:53,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:16:53,724 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:16:53,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:16:53,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1963095502, now seen corresponding path program 1 times [2020-10-28 14:16:53,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:16:53,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331102277] [2020-10-28 14:16:53,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:16:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:16:53,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:53,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:53,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:56,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:57,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:58,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:16:58,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-28 14:16:58,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:16:58,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 14:16:58,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:16:58,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:16:58,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:16:58,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:16:58,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-28 14:16:58,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:16:59,021 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:16:59,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:16:59,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:16:59,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:59,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:16:59,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:16:59,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:16:59,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 14:16:59,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:16:59,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:16:59,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:16:59,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:16:59,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:16:59,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:16:59,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:16:59,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:16:59,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:59,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:16:59,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 14:16:59,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:16:59,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-28 14:16:59,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:16:59,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:16:59,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:16:59,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:16:59,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 14:16:59,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:16:59,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-28 14:16:59,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:16:59,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:59,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:16:59,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 14:16:59,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:16:59,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-28 14:16:59,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:16:59,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:16:59,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:16:59,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-28 14:16:59,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:16:59,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:16:59,576 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 60 proven. 73 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 14:16:59,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331102277] [2020-10-28 14:16:59,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:16:59,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:16:59,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499299384] [2020-10-28 14:16:59,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:16:59,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:16:59,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:16:59,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:16:59,580 INFO L87 Difference]: Start difference. First operand 19427 states and 26537 transitions. Second operand 7 states. [2020-10-28 14:16:59,774 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 68