/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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=NARROWEST --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 -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 08:37:17,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 08:37:17,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 08:37:17,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 08:37:17,838 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 08:37:17,839 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 08:37:17,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 08:37:17,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 08:37:17,846 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 08:37:17,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 08:37:17,848 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 08:37:17,849 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 08:37:17,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 08:37:17,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 08:37:17,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 08:37:17,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 08:37:17,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 08:37:17,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 08:37:17,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 08:37:17,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 08:37:17,866 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 08:37:17,871 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 08:37:17,876 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 08:37:17,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 08:37:17,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 08:37:17,880 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 08:37:17,881 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 08:37:17,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 08:37:17,882 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 08:37:17,884 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 08:37:17,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 08:37:17,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 08:37:17,886 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 08:37:17,887 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 08:37:17,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 08:37:17,888 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 08:37:17,889 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 08:37:17,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 08:37:17,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 08:37:17,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 08:37:17,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 08:37:17,893 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 [2020-10-13 08:37:17,918 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 08:37:17,918 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 08:37:17,919 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 08:37:17,920 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 08:37:17,920 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 08:37:17,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 08:37:17,921 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 08:37:17,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 08:37:17,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 08:37:17,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 08:37:17,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 08:37:17,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 08:37:17,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 08:37:17,922 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 08:37:17,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 08:37:17,922 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 08:37:17,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 08:37:17,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 08:37:17,923 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 08:37:17,923 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 08:37:17,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 08:37:17,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 08:37:17,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 08:37:17,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 08:37:17,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 08:37:17,925 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 08:37:17,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 08:37:17,925 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 08:37:17,926 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 08:37:17,926 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 08:37:18,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 08:37:18,299 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 08:37:18,304 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 08:37:18,308 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 08:37:18,310 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 08:37:18,311 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label32.c [2020-10-13 08:37:18,400 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/638c6b57b/a3381493524240cfbfc1c909f1b5d9fd/FLAGd3791564b [2020-10-13 08:37:19,382 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 08:37:19,383 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label32.c [2020-10-13 08:37:19,432 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/638c6b57b/a3381493524240cfbfc1c909f1b5d9fd/FLAGd3791564b [2020-10-13 08:37:19,787 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/638c6b57b/a3381493524240cfbfc1c909f1b5d9fd [2020-10-13 08:37:19,800 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 08:37:19,802 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 08:37:19,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 08:37:19,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 08:37:19,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 08:37:19,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:37:19" (1/1) ... [2020-10-13 08:37:19,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@768da4c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:37:19, skipping insertion in model container [2020-10-13 08:37:19,814 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:37:19" (1/1) ... [2020-10-13 08:37:19,823 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 08:37:20,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 08:37:21,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 08:37:21,960 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 08:37:22,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 08:37:22,825 INFO L208 MainTranslator]: Completed translation [2020-10-13 08:37:22,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:37:22 WrapperNode [2020-10-13 08:37:22,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 08:37:22,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 08:37:22,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 08:37:22,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 08:37:22,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:37:22" (1/1) ... [2020-10-13 08:37:22,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:37:22" (1/1) ... [2020-10-13 08:37:22,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:37:22" (1/1) ... [2020-10-13 08:37:22,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:37:22" (1/1) ... [2020-10-13 08:37:23,062 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:37:22" (1/1) ... [2020-10-13 08:37:23,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:37:22" (1/1) ... [2020-10-13 08:37:23,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:37:22" (1/1) ... [2020-10-13 08:37:23,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 08:37:23,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 08:37:23,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 08:37:23,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 08:37:23,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:37:22" (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 [2020-10-13 08:37:23,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 08:37:23,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 08:37:23,277 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 08:37:23,278 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 08:37:23,278 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-13 08:37:23,278 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-13 08:37:23,278 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 08:37:23,278 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 08:37:23,279 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 08:37:23,279 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-13 08:37:23,279 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-13 08:37:23,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 08:37:23,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 08:37:23,280 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 08:37:23,280 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 08:37:23,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 08:37:23,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 08:37:35,990 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 08:37:35,991 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 08:37:36,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:37:36 BoogieIcfgContainer [2020-10-13 08:37:36,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 08:37:36,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 08:37:36,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 08:37:36,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 08:37:36,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:37:19" (1/3) ... [2020-10-13 08:37:36,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79e727b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:37:36, skipping insertion in model container [2020-10-13 08:37:36,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:37:22" (2/3) ... [2020-10-13 08:37:36,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79e727b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:37:36, skipping insertion in model container [2020-10-13 08:37:36,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:37:36" (3/3) ... [2020-10-13 08:37:36,019 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label32.c [2020-10-13 08:37:36,033 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 08:37:36,050 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 08:37:36,067 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 08:37:36,100 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 08:37:36,101 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 08:37:36,101 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 08:37:36,101 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 08:37:36,101 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 08:37:36,101 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 08:37:36,101 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 08:37:36,102 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 08:37:36,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2020-10-13 08:37:36,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 08:37:36,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 08:37:36,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 08:37:36,158 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 08:37:36,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 08:37:36,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1509131065, now seen corresponding path program 1 times [2020-10-13 08:37:36,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 08:37:36,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390187500] [2020-10-13 08:37:36,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 08:37:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:37:36,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:37:36,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:37:36,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 08:37:36,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:37:36,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 395 [2020-10-13 08:37:36,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:37:36,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 08:37:36,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 08:37:36,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 08:37:36,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 08:37:36,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 08:37:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:37:36,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:37:36,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:37:36,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 08:37:36,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:37:36,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 08:37:36,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:37:36,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 08:37:36,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:37:36,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 08:37:36,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 08:37:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 08:37:36,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390187500] [2020-10-13 08:37:36,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 08:37:36,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 08:37:36,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548628722] [2020-10-13 08:37:36,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 08:37:36,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 08:37:36,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 08:37:36,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 08:37:36,918 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 4 states. [2020-10-13 08:37:51,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 08:37:51,647 INFO L93 Difference]: Finished difference Result 3118 states and 5748 transitions. [2020-10-13 08:37:51,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 08:37:51,650 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-13 08:37:51,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 08:37:51,690 INFO L225 Difference]: With dead ends: 3118 [2020-10-13 08:37:51,690 INFO L226 Difference]: Without dead ends: 1935 [2020-10-13 08:37:51,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 08:37:51,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2020-10-13 08:37:51,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1917. [2020-10-13 08:37:51,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1917 states. [2020-10-13 08:37:51,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 2935 transitions. [2020-10-13 08:37:51,918 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 2935 transitions. Word has length 14 [2020-10-13 08:37:51,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 08:37:51,919 INFO L479 AbstractCegarLoop]: Abstraction has 1917 states and 2935 transitions. [2020-10-13 08:37:51,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 08:37:51,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 2935 transitions. [2020-10-13 08:37:51,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 08:37:51,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 08:37:51,928 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 08:37:51,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 08:37:51,929 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 08:37:51,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 08:37:51,931 INFO L82 PathProgramCache]: Analyzing trace with hash 74085643, now seen corresponding path program 1 times [2020-10-13 08:37:51,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 08:37:51,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391729147] [2020-10-13 08:37:51,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 08:37:52,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:37:52,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:37:52,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:37:53,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:37:53,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 08:37:53,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 08:37:53,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1534 [2020-10-13 08:37:53,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:37:53,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 08:37:53,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-13 08:37:53,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 08:37:53,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 08:37:53,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 08:37:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:37:53,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:37:53,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:37:53,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 08:37:53,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:37:53,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 08:37:53,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:37:53,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 08:37:53,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:37:53,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 08:37:53,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 08:37:53,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 08:37:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:37:53,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:37:53,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:37:53,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 08:37:53,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:37:53,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-13 08:37:53,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:37:53,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 08:37:53,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:37:53,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 08:37:53,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-13 08:37:54,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 08:37:54,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391729147] [2020-10-13 08:37:54,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 08:37:54,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 08:37:54,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100576986] [2020-10-13 08:37:54,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 08:37:54,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 08:37:54,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 08:37:54,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 08:37:54,064 INFO L87 Difference]: Start difference. First operand 1917 states and 2935 transitions. Second operand 5 states. [2020-10-13 08:38:12,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 08:38:12,433 INFO L93 Difference]: Finished difference Result 5493 states and 8493 transitions. [2020-10-13 08:38:12,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 08:38:12,435 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 90 [2020-10-13 08:38:12,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 08:38:12,457 INFO L225 Difference]: With dead ends: 5493 [2020-10-13 08:38:12,457 INFO L226 Difference]: Without dead ends: 3582 [2020-10-13 08:38:12,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 08:38:12,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3582 states. [2020-10-13 08:38:12,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3582 to 3577. [2020-10-13 08:38:12,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3577 states. [2020-10-13 08:38:12,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3577 states to 3577 states and 5069 transitions. [2020-10-13 08:38:12,576 INFO L78 Accepts]: Start accepts. Automaton has 3577 states and 5069 transitions. Word has length 90 [2020-10-13 08:38:12,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 08:38:12,577 INFO L479 AbstractCegarLoop]: Abstraction has 3577 states and 5069 transitions. [2020-10-13 08:38:12,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 08:38:12,578 INFO L276 IsEmpty]: Start isEmpty. Operand 3577 states and 5069 transitions. [2020-10-13 08:38:12,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 08:38:12,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 08:38:12,581 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 08:38:12,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 08:38:12,582 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 08:38:12,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 08:38:12,582 INFO L82 PathProgramCache]: Analyzing trace with hash -486181535, now seen corresponding path program 1 times [2020-10-13 08:38:12,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 08:38:12,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864019987] [2020-10-13 08:38:12,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 08:38:12,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:38:12,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:38:12,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:38:13,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:38:13,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 08:38:13,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 08:38:13,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1027 [2020-10-13 08:38:13,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:38:13,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 08:38:13,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 100 [2020-10-13 08:38:13,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 08:38:13,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 08:38:13,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 08:38:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:38:13,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:38:13,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:38:13,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 08:38:13,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:38:13,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 08:38:13,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:38:13,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 08:38:13,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:38:13,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 08:38:13,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 08:38:13,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 08:38:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:38:13,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:38:13,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:38:13,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 08:38:13,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:38:13,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-13 08:38:13,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:38:13,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 08:38:13,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:38:13,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-13 08:38:13,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 08:38:14,001 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 08:38:14,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864019987] [2020-10-13 08:38:14,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 08:38:14,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 08:38:14,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508943655] [2020-10-13 08:38:14,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 08:38:14,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 08:38:14,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 08:38:14,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 08:38:14,005 INFO L87 Difference]: Start difference. First operand 3577 states and 5069 transitions. Second operand 6 states. [2020-10-13 08:38:39,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 08:38:39,071 INFO L93 Difference]: Finished difference Result 10443 states and 15859 transitions. [2020-10-13 08:38:39,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 08:38:39,072 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 104 [2020-10-13 08:38:39,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 08:38:39,113 INFO L225 Difference]: With dead ends: 10443 [2020-10-13 08:38:39,114 INFO L226 Difference]: Without dead ends: 6872 [2020-10-13 08:38:39,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 08:38:39,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6872 states. [2020-10-13 08:38:39,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6872 to 6855. [2020-10-13 08:38:39,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6855 states. [2020-10-13 08:38:39,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6855 states to 6855 states and 9724 transitions. [2020-10-13 08:38:39,373 INFO L78 Accepts]: Start accepts. Automaton has 6855 states and 9724 transitions. Word has length 104 [2020-10-13 08:38:39,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 08:38:39,375 INFO L479 AbstractCegarLoop]: Abstraction has 6855 states and 9724 transitions. [2020-10-13 08:38:39,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 08:38:39,375 INFO L276 IsEmpty]: Start isEmpty. Operand 6855 states and 9724 transitions. [2020-10-13 08:38:39,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-13 08:38:39,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 08:38:39,395 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 08:38:39,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 08:38:39,396 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 08:38:39,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 08:38:39,396 INFO L82 PathProgramCache]: Analyzing trace with hash 462337910, now seen corresponding path program 1 times [2020-10-13 08:38:39,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 08:38:39,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230594511] [2020-10-13 08:38:39,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 08:38:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:38:39,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:38:39,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:38:40,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:38:42,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:38:44,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:38:44,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-13 08:38:44,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 08:38:44,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4696 [2020-10-13 08:38:44,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:38:44,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 08:38:44,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 199 [2020-10-13 08:38:44,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 08:38:44,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 08:38:44,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 08:38:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:38:44,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:38:44,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:38:44,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 08:38:44,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:38:44,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 08:38:44,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:38:44,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 08:38:44,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:38:44,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 08:38:44,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 08:38:44,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 08:38:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:38:44,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:38:44,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:38:44,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 08:38:44,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:38:44,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 08:38:44,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:38:44,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 08:38:44,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:38:44,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 08:38:44,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 08:38:44,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-10-13 08:38:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:38:44,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:38:44,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:38:44,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 08:38:44,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:38:44,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-13 08:38:44,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:38:44,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 08:38:44,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:38:44,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-13 08:38:44,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 08:38:44,568 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-13 08:38:44,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230594511] [2020-10-13 08:38:44,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 08:38:44,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 08:38:44,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105863899] [2020-10-13 08:38:44,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 08:38:44,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 08:38:44,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 08:38:44,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 08:38:44,575 INFO L87 Difference]: Start difference. First operand 6855 states and 9724 transitions. Second operand 5 states. [2020-10-13 08:39:04,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 08:39:04,946 INFO L93 Difference]: Finished difference Result 20218 states and 29445 transitions. [2020-10-13 08:39:04,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 08:39:04,948 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 201 [2020-10-13 08:39:04,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 08:39:05,023 INFO L225 Difference]: With dead ends: 20218 [2020-10-13 08:39:05,023 INFO L226 Difference]: Without dead ends: 13369 [2020-10-13 08:39:05,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 08:39:05,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13369 states. [2020-10-13 08:39:05,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13369 to 13364. [2020-10-13 08:39:05,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13364 states. [2020-10-13 08:39:05,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13364 states to 13364 states and 18275 transitions. [2020-10-13 08:39:05,452 INFO L78 Accepts]: Start accepts. Automaton has 13364 states and 18275 transitions. Word has length 201 [2020-10-13 08:39:05,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 08:39:05,454 INFO L479 AbstractCegarLoop]: Abstraction has 13364 states and 18275 transitions. [2020-10-13 08:39:05,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 08:39:05,454 INFO L276 IsEmpty]: Start isEmpty. Operand 13364 states and 18275 transitions. [2020-10-13 08:39:05,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-13 08:39:05,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 08:39:05,465 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 08:39:05,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 08:39:05,465 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 08:39:05,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 08:39:05,466 INFO L82 PathProgramCache]: Analyzing trace with hash -2091266912, now seen corresponding path program 1 times [2020-10-13 08:39:05,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 08:39:05,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957111465] [2020-10-13 08:39:05,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 08:39:05,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:39:05,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:05,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:06,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:07,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:39:07,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-13 08:39:07,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 08:39:07,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2157 [2020-10-13 08:39:07,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:39:07,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 08:39:07,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 212 [2020-10-13 08:39:07,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 08:39:07,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 08:39:07,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 08:39:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:39:07,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:07,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:39:07,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 08:39:07,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:39:07,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 08:39:07,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:39:07,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 08:39:07,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:39:07,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 08:39:07,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 08:39:07,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 08:39:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:39:08,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:08,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:39:08,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-13 08:39:08,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:39:08,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-10-13 08:39:08,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:39:08,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 08:39:08,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:39:08,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 197 [2020-10-13 08:39:08,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 08:39:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 08:39:08,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957111465] [2020-10-13 08:39:08,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 08:39:08,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 08:39:08,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735671310] [2020-10-13 08:39:08,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 08:39:08,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 08:39:08,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 08:39:08,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 08:39:08,389 INFO L87 Difference]: Start difference. First operand 13364 states and 18275 transitions. Second operand 5 states. [2020-10-13 08:39:39,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 08:39:39,650 INFO L93 Difference]: Finished difference Result 39800 states and 56265 transitions. [2020-10-13 08:39:39,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 08:39:39,653 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 217 [2020-10-13 08:39:39,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 08:39:39,766 INFO L225 Difference]: With dead ends: 39800 [2020-10-13 08:39:39,766 INFO L226 Difference]: Without dead ends: 26442 [2020-10-13 08:39:39,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 08:39:39,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26442 states. [2020-10-13 08:39:40,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26442 to 26389. [2020-10-13 08:39:40,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26389 states. [2020-10-13 08:39:40,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26389 states to 26389 states and 35340 transitions. [2020-10-13 08:39:40,425 INFO L78 Accepts]: Start accepts. Automaton has 26389 states and 35340 transitions. Word has length 217 [2020-10-13 08:39:40,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 08:39:40,426 INFO L479 AbstractCegarLoop]: Abstraction has 26389 states and 35340 transitions. [2020-10-13 08:39:40,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 08:39:40,426 INFO L276 IsEmpty]: Start isEmpty. Operand 26389 states and 35340 transitions. [2020-10-13 08:39:40,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-13 08:39:40,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 08:39:40,434 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 08:39:40,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 08:39:40,434 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 08:39:40,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 08:39:40,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1508070945, now seen corresponding path program 1 times [2020-10-13 08:39:40,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 08:39:40,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473731077] [2020-10-13 08:39:40,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 08:39:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:39:40,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:40,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:43,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:39:43,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-13 08:39:43,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 08:39:43,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2576 [2020-10-13 08:39:43,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:39:43,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 08:39:43,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 216 [2020-10-13 08:39:43,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 08:39:43,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 08:39:43,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 08:39:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:39:43,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:43,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:39:43,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 08:39:43,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:39:43,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 08:39:43,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:39:43,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 08:39:43,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:39:43,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 08:39:43,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 08:39:43,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 08:39:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:39:43,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:39:43,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:39:43,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-13 08:39:43,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:39:43,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-13 08:39:43,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:39:43,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 08:39:43,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:39:43,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 201 [2020-10-13 08:39:43,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 08:39:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 08:39:43,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473731077] [2020-10-13 08:39:43,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 08:39:43,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 08:39:43,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969379694] [2020-10-13 08:39:43,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 08:39:43,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 08:39:43,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 08:39:43,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 08:39:43,638 INFO L87 Difference]: Start difference. First operand 26389 states and 35340 transitions. Second operand 5 states. [2020-10-13 08:40:08,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 08:40:08,687 INFO L93 Difference]: Finished difference Result 77946 states and 107820 transitions. [2020-10-13 08:40:08,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 08:40:08,690 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 220 [2020-10-13 08:40:08,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 08:40:08,892 INFO L225 Difference]: With dead ends: 77946 [2020-10-13 08:40:08,893 INFO L226 Difference]: Without dead ends: 51563 [2020-10-13 08:40:08,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 08:40:09,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51563 states. [2020-10-13 08:40:09,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51563 to 51553. [2020-10-13 08:40:09,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51553 states. [2020-10-13 08:40:10,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51553 states to 51553 states and 69649 transitions. [2020-10-13 08:40:10,088 INFO L78 Accepts]: Start accepts. Automaton has 51553 states and 69649 transitions. Word has length 220 [2020-10-13 08:40:10,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 08:40:10,089 INFO L479 AbstractCegarLoop]: Abstraction has 51553 states and 69649 transitions. [2020-10-13 08:40:10,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 08:40:10,089 INFO L276 IsEmpty]: Start isEmpty. Operand 51553 states and 69649 transitions. [2020-10-13 08:40:10,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-10-13 08:40:10,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 08:40:10,107 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 08:40:10,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 08:40:10,107 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 08:40:10,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 08:40:10,108 INFO L82 PathProgramCache]: Analyzing trace with hash 828817224, now seen corresponding path program 1 times [2020-10-13 08:40:10,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 08:40:10,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319584948] [2020-10-13 08:40:10,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 08:40:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:40:10,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:10,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:10,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:13,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:15,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:40:15,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 278 [2020-10-13 08:40:15,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 08:40:15,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 08:40:15,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:40:15,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 08:40:15,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 264 [2020-10-13 08:40:15,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 08:40:15,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 08:40:15,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 08:40:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:40:15,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:15,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:40:15,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 08:40:15,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:40:15,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 08:40:15,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:40:15,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 08:40:15,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:40:15,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 08:40:15,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 08:40:15,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 08:40:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:40:15,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:15,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:40:15,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 08:40:15,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:40:15,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-13 08:40:15,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:40:15,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 08:40:15,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:40:15,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 08:40:15,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 08:40:15,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-10-13 08:40:15,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:40:15,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:15,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:40:15,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-13 08:40:15,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:40:15,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-13 08:40:15,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:40:15,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 08:40:15,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:40:15,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-10-13 08:40:15,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 08:40:15,788 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-10-13 08:40:15,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319584948] [2020-10-13 08:40:15,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 08:40:15,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 08:40:15,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59051406] [2020-10-13 08:40:15,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 08:40:15,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 08:40:15,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 08:40:15,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 08:40:15,792 INFO L87 Difference]: Start difference. First operand 51553 states and 69649 transitions. Second operand 5 states. [2020-10-13 08:40:40,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 08:40:40,307 INFO L93 Difference]: Finished difference Result 120153 states and 165517 transitions. [2020-10-13 08:40:40,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 08:40:40,309 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 266 [2020-10-13 08:40:40,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 08:40:40,576 INFO L225 Difference]: With dead ends: 120153 [2020-10-13 08:40:40,576 INFO L226 Difference]: Without dead ends: 68606 [2020-10-13 08:40:40,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 08:40:40,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68606 states. [2020-10-13 08:40:43,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68606 to 68595. [2020-10-13 08:40:43,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68595 states. [2020-10-13 08:40:43,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68595 states to 68595 states and 93572 transitions. [2020-10-13 08:40:43,694 INFO L78 Accepts]: Start accepts. Automaton has 68595 states and 93572 transitions. Word has length 266 [2020-10-13 08:40:43,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 08:40:43,695 INFO L479 AbstractCegarLoop]: Abstraction has 68595 states and 93572 transitions. [2020-10-13 08:40:43,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 08:40:43,695 INFO L276 IsEmpty]: Start isEmpty. Operand 68595 states and 93572 transitions. [2020-10-13 08:40:43,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-13 08:40:43,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 08:40:43,714 INFO L422 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 08:40:43,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 08:40:43,715 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 08:40:43,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 08:40:43,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1415794620, now seen corresponding path program 1 times [2020-10-13 08:40:43,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 08:40:43,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161407871] [2020-10-13 08:40:43,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 08:40:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:40:43,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:44,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:44,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:45,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:46,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:40:46,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 284 [2020-10-13 08:40:46,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 08:40:46,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3083 [2020-10-13 08:40:46,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:40:46,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 08:40:46,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 268 [2020-10-13 08:40:46,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 08:40:46,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 08:40:46,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 08:40:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:40:46,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:46,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:40:46,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 08:40:46,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:40:46,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 08:40:46,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:40:46,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 08:40:46,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:40:46,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 08:40:46,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 08:40:47,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 08:40:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:40:47,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:47,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:40:47,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 08:40:47,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:40:47,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-13 08:40:47,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:40:47,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 08:40:47,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 08:40:47,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 08:40:47,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 08:40:47,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-10-13 08:40:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 08:40:47,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 08:40:47,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 08:40:47,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-13 08:40:47,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 08:40:47,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-13 08:40:47,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 08:40:47,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 08:40:47,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 161 [2020-10-13 08:40:47,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 08:40:47,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 08:40:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-13 08:40:47,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161407871] [2020-10-13 08:40:47,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 08:40:47,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 08:40:47,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108896748] [2020-10-13 08:40:47,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 08:40:47,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 08:40:47,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 08:40:47,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 08:40:47,523 INFO L87 Difference]: Start difference. First operand 68595 states and 93572 transitions. Second operand 5 states.