/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/Problem19_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:02:36,887 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:02:36,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:02:36,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:02:36,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:02:36,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:02:36,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:02:36,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:02:36,945 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:02:36,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:02:36,948 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:02:36,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:02:36,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:02:36,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:02:36,955 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:02:36,956 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:02:36,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:02:36,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:02:36,960 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:02:36,967 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:02:36,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:02:36,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:02:36,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:02:36,971 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:02:36,983 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:02:36,983 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:02:36,983 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:02:36,984 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:02:36,985 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:02:36,985 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:02:36,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:02:36,987 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:02:36,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:02:36,988 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:02:36,989 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:02:36,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:02:36,990 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:02:36,990 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:02:36,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:02:36,991 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:02:36,992 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:02:36,993 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 10:02:37,031 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:02:37,031 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:02:37,033 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:02:37,033 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:02:37,033 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:02:37,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:02:37,034 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:02:37,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:02:37,034 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:02:37,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:02:37,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:02:37,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:02:37,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:02:37,036 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:02:37,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:02:37,036 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:02:37,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:02:37,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:02:37,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:02:37,037 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:02:37,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:02:37,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:02:37,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:02:37,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:02:37,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:02:37,038 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:02:37,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:02:37,038 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:02:37,039 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:02:37,039 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 10:02:37,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:02:37,316 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:02:37,322 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:02:37,324 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:02:37,324 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:02:37,325 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label24.c [2020-10-13 10:02:37,396 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/514dfbc82/3a79e1c015364aec8da6dbf854e45fd3/FLAGf3d941937 [2020-10-13 10:02:38,231 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:02:38,232 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label24.c [2020-10-13 10:02:38,276 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/514dfbc82/3a79e1c015364aec8da6dbf854e45fd3/FLAGf3d941937 [2020-10-13 10:02:38,729 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/514dfbc82/3a79e1c015364aec8da6dbf854e45fd3 [2020-10-13 10:02:38,737 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:02:38,739 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:02:38,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:02:38,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:02:38,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:02:38,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:02:38" (1/1) ... [2020-10-13 10:02:38,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@243023c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:38, skipping insertion in model container [2020-10-13 10:02:38,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:02:38" (1/1) ... [2020-10-13 10:02:38,758 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:02:38,986 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:02:41,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:02:41,369 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:02:42,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:02:42,370 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:02:42,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:42 WrapperNode [2020-10-13 10:02:42,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:02:42,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:02:42,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:02:42,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:02:42,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:42" (1/1) ... [2020-10-13 10:02:42,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:42" (1/1) ... [2020-10-13 10:02:42,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:42" (1/1) ... [2020-10-13 10:02:42,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:42" (1/1) ... [2020-10-13 10:02:42,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:42" (1/1) ... [2020-10-13 10:02:42,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:42" (1/1) ... [2020-10-13 10:02:42,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:42" (1/1) ... [2020-10-13 10:02:42,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:02:42,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:02:42,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:02:42,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:02:42,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:42" (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 10:02:42,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:02:42,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:02:42,988 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-13 10:02:42,988 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-13 10:02:42,988 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-13 10:02:42,988 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-13 10:02:42,988 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-13 10:02:42,989 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-13 10:02:42,989 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:02:42,990 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-13 10:02:42,990 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-13 10:02:42,990 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-13 10:02:42,990 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-13 10:02:42,990 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-13 10:02:42,990 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-13 10:02:42,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:02:42,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:02:42,992 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-13 10:02:42,992 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:02:42,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:02:42,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:02:54,476 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:02:54,476 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:02:54,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:02:54 BoogieIcfgContainer [2020-10-13 10:02:54,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:02:54,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:02:54,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:02:54,498 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:02:54,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:02:38" (1/3) ... [2020-10-13 10:02:54,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4650de3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:02:54, skipping insertion in model container [2020-10-13 10:02:54,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:02:42" (2/3) ... [2020-10-13 10:02:54,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4650de3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:02:54, skipping insertion in model container [2020-10-13 10:02:54,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:02:54" (3/3) ... [2020-10-13 10:02:54,501 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem19_label24.c [2020-10-13 10:02:54,511 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:02:54,519 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:02:54,533 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:02:54,561 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:02:54,562 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:02:54,562 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:02:54,562 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:02:54,562 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:02:54,562 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:02:54,562 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:02:54,563 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:02:54,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states. [2020-10-13 10:02:54,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 10:02:54,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:02:54,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:02:54,615 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:02:54,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:02:54,622 INFO L82 PathProgramCache]: Analyzing trace with hash 692192756, now seen corresponding path program 1 times [2020-10-13 10:02:54,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:02:54,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635553725] [2020-10-13 10:02:54,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:02:54,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:02:54,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:02:55,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:02:55,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 10:02:55,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:02:55,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 472 [2020-10-13 10:02:55,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:02:55,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:02:55,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:02:55,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 10:02:55,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:02:55,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:02:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:02:55,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:02:55,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:02:55,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:02:55,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:02:55,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 10:02:55,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:02:55,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:02:55,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:02:55,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:02:55,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:02:55,437 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 10:02:55,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635553725] [2020-10-13 10:02:55,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:02:55,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:02:55,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534734954] [2020-10-13 10:02:55,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:02:55,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:02:55,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:02:55,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:02:55,467 INFO L87 Difference]: Start difference. First operand 1777 states. Second operand 5 states. [2020-10-13 10:03:17,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:03:17,766 INFO L93 Difference]: Finished difference Result 5086 states and 9561 transitions. [2020-10-13 10:03:17,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:03:17,769 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-10-13 10:03:17,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:03:17,806 INFO L225 Difference]: With dead ends: 5086 [2020-10-13 10:03:17,806 INFO L226 Difference]: Without dead ends: 3245 [2020-10-13 10:03:17,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:03:17,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2020-10-13 10:03:17,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 3178. [2020-10-13 10:03:17,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-10-13 10:03:17,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 5849 transitions. [2020-10-13 10:03:17,979 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 5849 transitions. Word has length 51 [2020-10-13 10:03:17,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:03:17,979 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 5849 transitions. [2020-10-13 10:03:17,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:03:17,980 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 5849 transitions. [2020-10-13 10:03:17,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 10:03:17,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:03:17,986 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, 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] [2020-10-13 10:03:17,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:03:17,986 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:03:17,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:03:17,987 INFO L82 PathProgramCache]: Analyzing trace with hash -549491864, now seen corresponding path program 1 times [2020-10-13 10:03:17,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:03:17,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120045106] [2020-10-13 10:03:17,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:03:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:18,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:18,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:18,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:18,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:19,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:19,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 10:03:19,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:03:19,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1400 [2020-10-13 10:03:19,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:19,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:03:19,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-13 10:03:19,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:03:19,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-13 10:03:19,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:03:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:19,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:19,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:19,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:03:19,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:03:19,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 10:03:19,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:19,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:03:19,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:03:19,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:03:19,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:03:19,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:03:19,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:19,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:19,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:19,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 10:03:19,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:03:19,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-13 10:03:19,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:19,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:03:19,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-13 10:03:19,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:03:19,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:03:19,717 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:03:19,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120045106] [2020-10-13 10:03:19,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:03:19,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:03:19,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591229791] [2020-10-13 10:03:19,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:03:19,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:03:19,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:03:19,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:03:19,721 INFO L87 Difference]: Start difference. First operand 3178 states and 5849 transitions. Second operand 5 states. [2020-10-13 10:03:44,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:03:44,320 INFO L93 Difference]: Finished difference Result 7873 states and 14546 transitions. [2020-10-13 10:03:44,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:03:44,321 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 122 [2020-10-13 10:03:44,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:03:44,347 INFO L225 Difference]: With dead ends: 7873 [2020-10-13 10:03:44,348 INFO L226 Difference]: Without dead ends: 4701 [2020-10-13 10:03:44,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:03:44,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4701 states. [2020-10-13 10:03:44,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4701 to 4636. [2020-10-13 10:03:44,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4636 states. [2020-10-13 10:03:44,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 7585 transitions. [2020-10-13 10:03:44,465 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 7585 transitions. Word has length 122 [2020-10-13 10:03:44,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:03:44,466 INFO L479 AbstractCegarLoop]: Abstraction has 4636 states and 7585 transitions. [2020-10-13 10:03:44,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:03:44,466 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 7585 transitions. [2020-10-13 10:03:44,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-13 10:03:44,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:03:44,469 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, 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] [2020-10-13 10:03:44,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:03:44,470 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:03:44,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:03:44,470 INFO L82 PathProgramCache]: Analyzing trace with hash -754463920, now seen corresponding path program 1 times [2020-10-13 10:03:44,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:03:44,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12612418] [2020-10-13 10:03:44,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:03:44,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:44,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:44,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:45,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:45,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-13 10:03:45,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:03:45,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 935 [2020-10-13 10:03:45,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:45,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:03:45,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-13 10:03:45,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 10:03:45,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:03:45,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:03:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:45,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:45,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:45,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:03:45,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:03:45,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:03:45,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:45,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:03:45,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:03:45,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:03:45,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:03:45,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:03:45,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:03:45,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:03:45,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:03:45,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 10:03:45,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:03:45,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-13 10:03:45,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:03:45,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:03:45,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:03:45,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 10:03:45,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:03:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:03:45,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12612418] [2020-10-13 10:03:45,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:03:45,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:03:45,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350240007] [2020-10-13 10:03:45,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:03:45,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:03:45,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:03:45,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:03:45,713 INFO L87 Difference]: Start difference. First operand 4636 states and 7585 transitions. Second operand 5 states. [2020-10-13 10:04:17,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:04:17,608 INFO L93 Difference]: Finished difference Result 13515 states and 22388 transitions. [2020-10-13 10:04:17,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:04:17,612 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 127 [2020-10-13 10:04:17,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:04:17,656 INFO L225 Difference]: With dead ends: 13515 [2020-10-13 10:04:17,656 INFO L226 Difference]: Without dead ends: 8885 [2020-10-13 10:04:17,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:04:17,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8885 states. [2020-10-13 10:04:17,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8885 to 8879. [2020-10-13 10:04:17,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8879 states. [2020-10-13 10:04:17,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8879 states to 8879 states and 12612 transitions. [2020-10-13 10:04:17,936 INFO L78 Accepts]: Start accepts. Automaton has 8879 states and 12612 transitions. Word has length 127 [2020-10-13 10:04:17,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:04:17,938 INFO L479 AbstractCegarLoop]: Abstraction has 8879 states and 12612 transitions. [2020-10-13 10:04:17,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:04:17,938 INFO L276 IsEmpty]: Start isEmpty. Operand 8879 states and 12612 transitions. [2020-10-13 10:04:17,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-13 10:04:17,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:04:17,954 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, 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] [2020-10-13 10:04:17,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:04:17,958 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:04:17,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:04:17,959 INFO L82 PathProgramCache]: Analyzing trace with hash 989601650, now seen corresponding path program 1 times [2020-10-13 10:04:17,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:04:17,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085962919] [2020-10-13 10:04:17,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:04:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:04:18,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:18,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:18,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:19,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:04:19,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-13 10:04:19,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:04:19,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1638 [2020-10-13 10:04:19,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:04:19,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:04:19,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 112 [2020-10-13 10:04:19,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:04:19,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:04:19,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:04:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:04:19,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:19,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:04:19,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:04:19,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:04:19,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:04:19,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:04:19,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:04:19,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:04:19,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:04:19,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:04:19,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:04:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:04:19,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:20,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:04:20,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 10:04:20,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:04:20,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-13 10:04:20,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:04:20,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:04:20,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:04:20,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-13 10:04:20,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:04:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:04:20,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085962919] [2020-10-13 10:04:20,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:04:20,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:04:20,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088177108] [2020-10-13 10:04:20,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:04:20,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:04:20,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:04:20,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:04:20,239 INFO L87 Difference]: Start difference. First operand 8879 states and 12612 transitions. Second operand 6 states. [2020-10-13 10:04:55,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:04:55,482 INFO L93 Difference]: Finished difference Result 17801 states and 25298 transitions. [2020-10-13 10:04:55,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:04:55,487 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 153 [2020-10-13 10:04:55,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:04:55,527 INFO L225 Difference]: With dead ends: 17801 [2020-10-13 10:04:55,527 INFO L226 Difference]: Without dead ends: 8883 [2020-10-13 10:04:55,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:04:55,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8883 states. [2020-10-13 10:04:55,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8883 to 8879. [2020-10-13 10:04:55,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8879 states. [2020-10-13 10:04:55,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8879 states to 8879 states and 12574 transitions. [2020-10-13 10:04:55,794 INFO L78 Accepts]: Start accepts. Automaton has 8879 states and 12574 transitions. Word has length 153 [2020-10-13 10:04:55,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:04:55,796 INFO L479 AbstractCegarLoop]: Abstraction has 8879 states and 12574 transitions. [2020-10-13 10:04:55,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:04:55,796 INFO L276 IsEmpty]: Start isEmpty. Operand 8879 states and 12574 transitions. [2020-10-13 10:04:55,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-13 10:04:55,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:04:55,800 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, 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] [2020-10-13 10:04:55,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:04:55,800 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:04:55,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:04:55,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1643989170, now seen corresponding path program 1 times [2020-10-13 10:04:55,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:04:55,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64894148] [2020-10-13 10:04:55,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:04:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:04:55,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:55,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:56,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:57,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:04:57,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-13 10:04:57,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:04:57,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1355 [2020-10-13 10:04:57,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:04:57,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:04:57,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 126 [2020-10-13 10:04:57,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:04:57,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:04:57,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:04:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:04:57,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:57,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:04:57,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:04:57,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:04:57,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:04:57,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:04:57,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:04:57,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:04:57,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:04:57,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:04:57,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:04:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:04:57,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:04:57,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:04:57,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 10:04:57,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:04:57,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-13 10:04:57,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:04:57,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:04:57,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:04:57,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-13 10:04:57,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:04:57,626 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:04:57,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64894148] [2020-10-13 10:04:57,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:04:57,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:04:57,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402909000] [2020-10-13 10:04:57,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:04:57,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:04:57,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:04:57,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:04:57,629 INFO L87 Difference]: Start difference. First operand 8879 states and 12574 transitions. Second operand 5 states. [2020-10-13 10:05:40,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:05:40,245 INFO L93 Difference]: Finished difference Result 17801 states and 25237 transitions. [2020-10-13 10:05:40,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:05:40,258 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 167 [2020-10-13 10:05:40,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:05:40,289 INFO L225 Difference]: With dead ends: 17801 [2020-10-13 10:05:40,289 INFO L226 Difference]: Without dead ends: 8883 [2020-10-13 10:05:40,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:05:40,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8883 states. [2020-10-13 10:05:40,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8883 to 8879. [2020-10-13 10:05:40,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8879 states. [2020-10-13 10:05:40,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8879 states to 8879 states and 12176 transitions. [2020-10-13 10:05:40,552 INFO L78 Accepts]: Start accepts. Automaton has 8879 states and 12176 transitions. Word has length 167 [2020-10-13 10:05:40,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:05:40,554 INFO L479 AbstractCegarLoop]: Abstraction has 8879 states and 12176 transitions. [2020-10-13 10:05:40,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:05:40,555 INFO L276 IsEmpty]: Start isEmpty. Operand 8879 states and 12176 transitions. [2020-10-13 10:05:40,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-13 10:05:40,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:05:40,560 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, 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] [2020-10-13 10:05:40,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:05:40,561 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:05:40,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:05:40,562 INFO L82 PathProgramCache]: Analyzing trace with hash -390099932, now seen corresponding path program 1 times [2020-10-13 10:05:40,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:05:40,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469241779] [2020-10-13 10:05:40,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:05:40,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:05:40,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:40,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:41,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:05:41,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-13 10:05:41,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:05:41,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 929 [2020-10-13 10:05:41,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:05:41,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:05:41,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 129 [2020-10-13 10:05:41,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 10:05:41,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:05:41,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:05:41,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:05:41,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:41,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:05:41,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:05:41,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:05:41,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:05:41,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:05:41,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:05:41,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:05:41,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:05:41,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:05:41,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:05:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:05:41,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:05:41,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:05:41,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 10:05:41,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:05:41,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-13 10:05:41,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:05:41,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:05:41,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:05:41,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-13 10:05:41,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:05:42,072 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:05:42,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469241779] [2020-10-13 10:05:42,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:05:42,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:05:42,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162735670] [2020-10-13 10:05:42,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:05:42,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:05:42,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:05:42,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:05:42,076 INFO L87 Difference]: Start difference. First operand 8879 states and 12176 transitions. Second operand 5 states. [2020-10-13 10:06:32,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:06:32,502 INFO L93 Difference]: Finished difference Result 21991 states and 31354 transitions. [2020-10-13 10:06:32,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:06:32,506 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 170 [2020-10-13 10:06:32,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:06:32,552 INFO L225 Difference]: With dead ends: 21991 [2020-10-13 10:06:32,552 INFO L226 Difference]: Without dead ends: 13118 [2020-10-13 10:06:32,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:06:32,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13118 states. [2020-10-13 10:06:32,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13118 to 13112. [2020-10-13 10:06:32,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13112 states. [2020-10-13 10:06:32,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13112 states to 13112 states and 17119 transitions. [2020-10-13 10:06:32,876 INFO L78 Accepts]: Start accepts. Automaton has 13112 states and 17119 transitions. Word has length 170 [2020-10-13 10:06:32,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:06:32,877 INFO L479 AbstractCegarLoop]: Abstraction has 13112 states and 17119 transitions. [2020-10-13 10:06:32,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:06:32,877 INFO L276 IsEmpty]: Start isEmpty. Operand 13112 states and 17119 transitions. [2020-10-13 10:06:32,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-13 10:06:32,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:06:32,883 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:06:32,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:06:32,884 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:06:32,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:06:32,884 INFO L82 PathProgramCache]: Analyzing trace with hash 330548284, now seen corresponding path program 1 times [2020-10-13 10:06:32,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:06:32,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685027221] [2020-10-13 10:06:32,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:06:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:06:32,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:32,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:33,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:33,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:33,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:36,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:37,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:37,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:06:37,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-13 10:06:37,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 10:06:37,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 10:06:37,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:06:37,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:06:37,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 176 [2020-10-13 10:06:37,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:06:37,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:06:38,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:06:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:06:38,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:38,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:06:38,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:06:38,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:06:38,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:06:38,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:06:38,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:06:38,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:06:38,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:06:38,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:06:38,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-13 10:06:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:06:38,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:38,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:06:38,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 10:06:38,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:06:38,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 10:06:38,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:06:38,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:06:38,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:06:38,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:06:38,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:06:38,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-13 10:06:38,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:06:38,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:06:38,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:06:38,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 10:06:38,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:06:38,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-13 10:06:38,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:06:38,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:06:38,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-13 10:06:38,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 10:06:38,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:06:38,439 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-13 10:06:38,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685027221] [2020-10-13 10:06:38,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:06:38,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:06:38,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887126320] [2020-10-13 10:06:38,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:06:38,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:06:38,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:06:38,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:06:38,444 INFO L87 Difference]: Start difference. First operand 13112 states and 17119 transitions. Second operand 5 states.