/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 SingleStatement --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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.1 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 10:15:35,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 10:15:35,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 10:15:35,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 10:15:35,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 10:15:35,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 10:15:35,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 10:15:35,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 10:15:35,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 10:15:35,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 10:15:35,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 10:15:35,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 10:15:35,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 10:15:35,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 10:15:35,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 10:15:35,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 10:15:35,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 10:15:35,894 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 10:15:35,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 10:15:35,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 10:15:35,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 10:15:35,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 10:15:35,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 10:15:35,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 10:15:35,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 10:15:35,914 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 10:15:35,915 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 10:15:35,918 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 10:15:35,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 10:15:35,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 10:15:35,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 10:15:35,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 10:15:35,924 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 10:15:35,925 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 10:15:35,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 10:15:35,927 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 10:15:35,928 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 10:15:35,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 10:15:35,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 10:15:35,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 10:15:35,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 10:15:35,933 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 [2020-09-25 10:15:35,987 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 10:15:35,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 10:15:35,990 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 10:15:35,990 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 10:15:35,990 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 10:15:35,991 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 10:15:35,991 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 10:15:35,991 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 10:15:35,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 10:15:35,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 10:15:35,993 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 10:15:35,993 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 10:15:35,994 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 10:15:35,994 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 10:15:35,994 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 10:15:35,994 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 10:15:35,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 10:15:35,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 10:15:35,995 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 10:15:35,995 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 10:15:35,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 10:15:35,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 10:15:35,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 10:15:35,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 10:15:35,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 10:15:35,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 10:15:35,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 10:15:35,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 10:15:35,997 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 10:15:35,998 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 -> SingleStatement 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=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=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=SMALLESTAMONGWIDE;tolerance=0.1;log-additional-information=true; [2020-09-25 10:15:36,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 10:15:36,503 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 10:15:36,508 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 10:15:36,510 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 10:15:36,510 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 10:15:36,511 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-25 10:15:36,604 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0af3944c9/66be3036322e4a928a022565f84c4f07/FLAG4e6065edd [2020-09-25 10:15:37,168 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 10:15:37,169 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-25 10:15:37,178 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0af3944c9/66be3036322e4a928a022565f84c4f07/FLAG4e6065edd [2020-09-25 10:15:37,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0af3944c9/66be3036322e4a928a022565f84c4f07 [2020-09-25 10:15:37,512 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 10:15:37,518 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 10:15:37,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 10:15:37,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 10:15:37,526 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 10:15:37,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:15:37" (1/1) ... [2020-09-25 10:15:37,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dd6f99d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:15:37, skipping insertion in model container [2020-09-25 10:15:37,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:15:37" (1/1) ... [2020-09-25 10:15:37,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 10:15:37,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 10:15:37,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:15:37,821 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 10:15:37,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 10:15:37,863 INFO L208 MainTranslator]: Completed translation [2020-09-25 10:15:37,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:15:37 WrapperNode [2020-09-25 10:15:37,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 10:15:37,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 10:15:37,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 10:15:37,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 10:15:37,957 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:15:37" (1/1) ... [2020-09-25 10:15:37,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:15:37" (1/1) ... [2020-09-25 10:15:37,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:15:37" (1/1) ... [2020-09-25 10:15:37,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:15:37" (1/1) ... [2020-09-25 10:15:37,984 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:15:37" (1/1) ... [2020-09-25 10:15:37,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:15:37" (1/1) ... [2020-09-25 10:15:37,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:15:37" (1/1) ... [2020-09-25 10:15:38,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 10:15:38,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 10:15:38,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 10:15:38,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 10:15:38,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:15:37" (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 [2020-09-25 10:15:38,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 10:15:38,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 10:15:38,083 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 10:15:38,083 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-25 10:15:38,083 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 10:15:38,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 10:15:38,084 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 10:15:38,085 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 10:15:38,085 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-09-25 10:15:38,085 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 10:15:38,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 10:15:38,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 10:15:38,086 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 10:15:38,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 10:15:38,086 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 10:15:38,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 10:15:38,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 10:15:38,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 10:15:38,426 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 10:15:38,426 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 10:15:38,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:15:38 BoogieIcfgContainer [2020-09-25 10:15:38,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 10:15:38,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 10:15:38,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 10:15:38,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 10:15:38,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:15:37" (1/3) ... [2020-09-25 10:15:38,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f1e9d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:15:38, skipping insertion in model container [2020-09-25 10:15:38,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:15:37" (2/3) ... [2020-09-25 10:15:38,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57f1e9d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:15:38, skipping insertion in model container [2020-09-25 10:15:38,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:15:38" (3/3) ... [2020-09-25 10:15:38,441 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-09-25 10:15:38,452 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 10:15:38,462 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 10:15:38,482 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 10:15:38,509 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 10:15:38,509 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 10:15:38,510 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 10:15:38,510 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 10:15:38,510 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 10:15:38,510 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 10:15:38,510 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 10:15:38,510 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 10:15:38,533 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-09-25 10:15:38,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 10:15:38,541 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:15:38,542 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] [2020-09-25 10:15:38,543 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:15:38,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:15:38,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2004589429, now seen corresponding path program 1 times [2020-09-25 10:15:38,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:15:38,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080529976] [2020-09-25 10:15:38,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:15:38,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:15:38,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:38,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:38,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:15:38,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 10:15:38,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:15:38,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-09-25 10:15:38,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:15:38,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:15:38,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 10:15:38,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 10:15:38,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 10:15:38,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-25 10:15:39,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:15:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:15:39,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:39,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:15:39,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:15:39,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:15:39,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 10:15:39,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:15:39,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:15:39,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:15:39,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:15:39,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:15:39,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:15:39,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 10:15:39,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:15:39,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:39,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:39,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:15:39,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 10:15:39,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:15:39,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 10:15:39,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:15:39,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:15:39,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:15:39,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:15:39,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:15:39,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:15:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:15:39,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080529976] [2020-09-25 10:15:39,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 10:15:39,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 10:15:39,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608057869] [2020-09-25 10:15:39,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 10:15:39,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:15:39,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 10:15:39,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 10:15:39,195 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 5 states. [2020-09-25 10:15:39,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:15:39,472 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2020-09-25 10:15:39,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 10:15:39,475 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-09-25 10:15:39,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:15:39,490 INFO L225 Difference]: With dead ends: 109 [2020-09-25 10:15:39,490 INFO L226 Difference]: Without dead ends: 68 [2020-09-25 10:15:39,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 10:15:39,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-25 10:15:39,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2020-09-25 10:15:39,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 10:15:39,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-09-25 10:15:39,558 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-09-25 10:15:39,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:15:39,559 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-09-25 10:15:39,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 10:15:39,560 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-09-25 10:15:39,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 10:15:39,562 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:15:39,563 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] [2020-09-25 10:15:39,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 10:15:39,564 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:15:39,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:15:39,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1596363536, now seen corresponding path program 1 times [2020-09-25 10:15:39,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:15:39,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015134739] [2020-09-25 10:15:39,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:15:39,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:15:39,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:39,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:40,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:41,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:15:41,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 10:15:41,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 10:15:41,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1894 [2020-09-25 10:15:41,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:15:41,509 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:15:41,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:15:41,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 10:15:41,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 10:15:41,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:15:41,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:15:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:15:41,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:41,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:15:41,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:15:41,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:15:41,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 10:15:41,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:15:41,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:15:41,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:15:41,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:15:41,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:15:41,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:15:41,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 10:15:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:15:41,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:41,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:41,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:15:41,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 10:15:41,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 10:15:41,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-25 10:15:41,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:15:41,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:15:41,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 10:15:41,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 10:15:41,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 10:15:41,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:15:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 10:15:41,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015134739] [2020-09-25 10:15:41,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:15:41,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 10:15:41,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657033260] [2020-09-25 10:15:41,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 10:15:41,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:15:41,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 10:15:41,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-09-25 10:15:41,876 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 14 states. [2020-09-25 10:15:42,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:15:42,763 INFO L93 Difference]: Finished difference Result 128 states and 145 transitions. [2020-09-25 10:15:42,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 10:15:42,763 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-09-25 10:15:42,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:15:42,765 INFO L225 Difference]: With dead ends: 128 [2020-09-25 10:15:42,766 INFO L226 Difference]: Without dead ends: 100 [2020-09-25 10:15:42,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2020-09-25 10:15:42,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-25 10:15:42,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 71. [2020-09-25 10:15:42,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-25 10:15:42,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2020-09-25 10:15:42,783 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 36 [2020-09-25 10:15:42,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:15:42,783 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2020-09-25 10:15:42,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 10:15:42,784 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2020-09-25 10:15:42,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-25 10:15:42,787 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:15:42,787 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] [2020-09-25 10:15:42,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 10:15:42,787 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:15:42,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:15:42,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1998641845, now seen corresponding path program 1 times [2020-09-25 10:15:42,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:15:42,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767181767] [2020-09-25 10:15:42,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:15:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:15:42,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:42,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:42,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:44,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:15:44,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 10:15:44,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 10:15:44,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1473 [2020-09-25 10:15:44,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:15:44,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:15:44,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 10:15:44,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 10:15:44,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 10:15:44,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:15:44,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:15:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:15:44,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:44,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:15:44,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:15:44,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:15:44,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 10:15:44,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:15:44,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:15:44,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:15:44,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:15:44,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:15:44,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:15:44,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 10:15:44,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:15:44,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:44,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:15:44,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 10:15:44,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:15:44,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-09-25 10:15:44,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:15:44,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:15:44,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 10:15:44,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 10:15:44,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 10:15:44,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:15:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:15:44,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767181767] [2020-09-25 10:15:44,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:15:44,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 10:15:44,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205377393] [2020-09-25 10:15:44,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 10:15:44,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:15:44,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 10:15:44,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-25 10:15:44,478 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 9 states. [2020-09-25 10:15:44,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:15:44,747 INFO L93 Difference]: Finished difference Result 129 states and 145 transitions. [2020-09-25 10:15:44,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 10:15:44,748 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-09-25 10:15:44,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:15:44,749 INFO L225 Difference]: With dead ends: 129 [2020-09-25 10:15:44,749 INFO L226 Difference]: Without dead ends: 81 [2020-09-25 10:15:44,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-09-25 10:15:44,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-25 10:15:44,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2020-09-25 10:15:44,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-25 10:15:44,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2020-09-25 10:15:44,761 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 43 [2020-09-25 10:15:44,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:15:44,761 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2020-09-25 10:15:44,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 10:15:44,762 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2020-09-25 10:15:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 10:15:44,763 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:15:44,763 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] [2020-09-25 10:15:44,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 10:15:44,764 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:15:44,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:15:44,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1456554063, now seen corresponding path program 2 times [2020-09-25 10:15:44,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:15:44,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747200748] [2020-09-25 10:15:44,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:15:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:15:44,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:44,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:44,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:47,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:15:47,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 10:15:47,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 10:15:47,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2535 [2020-09-25 10:15:47,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:15:47,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:15:47,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:15:47,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 10:15:47,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 10:15:47,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:15:47,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:15:47,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:15:47,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:47,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:15:47,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:15:47,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:15:47,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 10:15:47,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:15:47,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:15:47,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:15:47,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:15:47,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:15:47,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:15:47,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 10:15:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:15:47,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:47,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:15:47,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 10:15:47,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:15:47,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-09-25 10:15:47,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:15:47,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:15:47,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 10:15:47,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 10:15:47,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 10:15:47,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:15:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:15:47,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747200748] [2020-09-25 10:15:47,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:15:47,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 10:15:47,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992028017] [2020-09-25 10:15:47,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 10:15:47,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:15:47,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 10:15:47,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-25 10:15:47,783 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand 11 states. [2020-09-25 10:15:48,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:15:48,147 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2020-09-25 10:15:48,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 10:15:48,147 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-09-25 10:15:48,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:15:48,149 INFO L225 Difference]: With dead ends: 135 [2020-09-25 10:15:48,149 INFO L226 Difference]: Without dead ends: 87 [2020-09-25 10:15:48,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-09-25 10:15:48,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-25 10:15:48,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2020-09-25 10:15:48,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-25 10:15:48,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2020-09-25 10:15:48,167 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 49 [2020-09-25 10:15:48,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:15:48,168 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2020-09-25 10:15:48,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 10:15:48,168 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2020-09-25 10:15:48,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 10:15:48,170 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:15:48,171 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:15:48,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 10:15:48,171 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:15:48,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:15:48,172 INFO L82 PathProgramCache]: Analyzing trace with hash 2095314861, now seen corresponding path program 3 times [2020-09-25 10:15:48,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:15:48,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059045819] [2020-09-25 10:15:48,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:15:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:15:48,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:48,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:48,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:51,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:15:51,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 10:15:51,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 10:15:51,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3426 [2020-09-25 10:15:51,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:15:51,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:15:51,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 10:15:51,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 10:15:51,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 10:15:51,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:15:51,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:15:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:15:51,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:51,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:15:51,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:15:51,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:15:51,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 10:15:51,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:15:51,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:15:51,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:15:51,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:15:51,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:15:51,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 10:15:51,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 10:15:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:15:51,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:51,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:15:51,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 10:15:51,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:15:51,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-09-25 10:15:51,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:15:51,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:15:51,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 10:15:51,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 10:15:51,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 10:15:51,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-25 10:15:52,078 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:15:52,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059045819] [2020-09-25 10:15:52,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:15:52,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 10:15:52,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187132353] [2020-09-25 10:15:52,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 10:15:52,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:15:52,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 10:15:52,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-25 10:15:52,083 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand 13 states. [2020-09-25 10:15:52,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:15:52,552 INFO L93 Difference]: Finished difference Result 141 states and 157 transitions. [2020-09-25 10:15:52,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 10:15:52,552 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-09-25 10:15:52,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:15:52,554 INFO L225 Difference]: With dead ends: 141 [2020-09-25 10:15:52,554 INFO L226 Difference]: Without dead ends: 93 [2020-09-25 10:15:52,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2020-09-25 10:15:52,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-25 10:15:52,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2020-09-25 10:15:52,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-25 10:15:52,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2020-09-25 10:15:52,574 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 55 [2020-09-25 10:15:52,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:15:52,574 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2020-09-25 10:15:52,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 10:15:52,575 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2020-09-25 10:15:52,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-25 10:15:52,576 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:15:52,577 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:15:52,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 10:15:52,577 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:15:52,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:15:52,578 INFO L82 PathProgramCache]: Analyzing trace with hash 2117485225, now seen corresponding path program 4 times [2020-09-25 10:15:52,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:15:52,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879600267] [2020-09-25 10:15:52,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:15:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:15:52,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:52,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:52,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:56,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:15:56,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-25 10:15:56,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 10:15:56,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3889 [2020-09-25 10:15:56,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:15:56,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:15:56,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 10:15:56,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 10:15:56,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-09-25 10:15:56,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:15:56,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:15:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:15:56,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:56,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:15:56,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:15:56,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:15:56,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 10:15:56,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:15:56,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:15:56,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:15:56,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:15:56,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:15:56,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:15:56,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 10:15:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:15:56,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:56,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:15:56,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-25 10:15:56,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:15:56,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-09-25 10:15:56,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:15:56,822 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:15:56,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 10:15:56,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 10:15:56,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 10:15:56,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:15:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:15:56,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879600267] [2020-09-25 10:15:56,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:15:56,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 10:15:56,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099521059] [2020-09-25 10:15:56,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 10:15:56,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:15:56,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 10:15:56,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-25 10:15:56,991 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand 15 states. [2020-09-25 10:15:57,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:15:57,506 INFO L93 Difference]: Finished difference Result 147 states and 163 transitions. [2020-09-25 10:15:57,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 10:15:57,506 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-09-25 10:15:57,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:15:57,508 INFO L225 Difference]: With dead ends: 147 [2020-09-25 10:15:57,508 INFO L226 Difference]: Without dead ends: 99 [2020-09-25 10:15:57,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=236, Invalid=756, Unknown=0, NotChecked=0, Total=992 [2020-09-25 10:15:57,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-25 10:15:57,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2020-09-25 10:15:57,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-25 10:15:57,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2020-09-25 10:15:57,521 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 61 [2020-09-25 10:15:57,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:15:57,521 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2020-09-25 10:15:57,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 10:15:57,521 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2020-09-25 10:15:57,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-25 10:15:57,524 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:15:57,524 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:15:57,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 10:15:57,538 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:15:57,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:15:57,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1506500773, now seen corresponding path program 5 times [2020-09-25 10:15:57,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:15:57,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369986057] [2020-09-25 10:15:57,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:15:57,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:15:57,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:57,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:15:57,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:02,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:02,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 10:16:02,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 10:16:02,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4588 [2020-09-25 10:16:02,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:02,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:02,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 10:16:02,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 10:16:02,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-25 10:16:02,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 10:16:02,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:16:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:02,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:02,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:02,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:16:02,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:02,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 10:16:02,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:02,194 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:02,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:16:02,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:16:02,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:16:02,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:16:02,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 10:16:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:02,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:02,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:02,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-25 10:16:02,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:02,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 336 [2020-09-25 10:16:02,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:02,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:02,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 10:16:02,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 10:16:02,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 10:16:02,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:02,741 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:16:02,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369986057] [2020-09-25 10:16:02,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:16:02,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 10:16:02,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982520442] [2020-09-25 10:16:02,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 10:16:02,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:16:02,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 10:16:02,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-09-25 10:16:02,744 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand 17 states. [2020-09-25 10:16:03,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:16:03,451 INFO L93 Difference]: Finished difference Result 153 states and 169 transitions. [2020-09-25 10:16:03,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 10:16:03,452 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 67 [2020-09-25 10:16:03,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:16:03,454 INFO L225 Difference]: With dead ends: 153 [2020-09-25 10:16:03,454 INFO L226 Difference]: Without dead ends: 105 [2020-09-25 10:16:03,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 10:16:03,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-25 10:16:03,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2020-09-25 10:16:03,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-25 10:16:03,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2020-09-25 10:16:03,465 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 67 [2020-09-25 10:16:03,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:16:03,465 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2020-09-25 10:16:03,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 10:16:03,465 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2020-09-25 10:16:03,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-25 10:16:03,467 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:16:03,467 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:16:03,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 10:16:03,468 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:16:03,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:16:03,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1728507487, now seen corresponding path program 6 times [2020-09-25 10:16:03,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:16:03,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11713217] [2020-09-25 10:16:03,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:16:03,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:03,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:03,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:04,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:07,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:07,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-25 10:16:07,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 10:16:07,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3845 [2020-09-25 10:16:07,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:07,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:07,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 10:16:07,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 10:16:07,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-09-25 10:16:07,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:07,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:16:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:07,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:07,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:07,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:16:07,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:07,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 10:16:07,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:07,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:07,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:16:07,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:16:07,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:16:07,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:07,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 10:16:07,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:07,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:07,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:07,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-25 10:16:07,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:07,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 388 [2020-09-25 10:16:07,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:07,808 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:07,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 10:16:07,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 10:16:07,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-25 10:16:07,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:16:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:16:08,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11713217] [2020-09-25 10:16:08,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:16:08,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-25 10:16:08,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289500455] [2020-09-25 10:16:08,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-25 10:16:08,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:16:08,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-25 10:16:08,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2020-09-25 10:16:08,083 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand 19 states. [2020-09-25 10:16:08,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:16:08,940 INFO L93 Difference]: Finished difference Result 159 states and 175 transitions. [2020-09-25 10:16:08,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 10:16:08,941 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2020-09-25 10:16:08,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:16:08,943 INFO L225 Difference]: With dead ends: 159 [2020-09-25 10:16:08,943 INFO L226 Difference]: Without dead ends: 111 [2020-09-25 10:16:08,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=418, Invalid=1304, Unknown=0, NotChecked=0, Total=1722 [2020-09-25 10:16:08,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-25 10:16:08,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2020-09-25 10:16:08,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-25 10:16:08,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2020-09-25 10:16:08,952 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 73 [2020-09-25 10:16:08,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:16:08,952 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2020-09-25 10:16:08,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-25 10:16:08,953 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2020-09-25 10:16:08,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-25 10:16:08,954 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:16:08,954 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:16:08,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 10:16:08,954 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:16:08,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:16:08,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1573197213, now seen corresponding path program 7 times [2020-09-25 10:16:08,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:16:08,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703391535] [2020-09-25 10:16:08,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:16:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:08,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:09,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:10,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:13,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:13,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-25 10:16:13,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 10:16:13,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 10:16:13,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:13,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:13,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 10:16:13,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 10:16:13,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-25 10:16:13,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:16:14,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:16:14,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:14,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:14,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:14,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:16:14,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:14,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 10:16:14,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:14,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:14,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:16:14,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:16:14,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:16:14,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:14,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 10:16:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:14,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:14,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:14,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 10:16:14,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:14,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 491 [2020-09-25 10:16:14,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:14,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:14,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 10:16:14,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 10:16:14,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-25 10:16:14,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:16:14,846 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:16:14,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703391535] [2020-09-25 10:16:14,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:16:14,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-25 10:16:14,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881115374] [2020-09-25 10:16:14,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-25 10:16:14,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:16:14,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-25 10:16:14,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-09-25 10:16:14,849 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand 21 states. [2020-09-25 10:16:15,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:16:15,800 INFO L93 Difference]: Finished difference Result 165 states and 181 transitions. [2020-09-25 10:16:15,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-25 10:16:15,801 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 79 [2020-09-25 10:16:15,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:16:15,802 INFO L225 Difference]: With dead ends: 165 [2020-09-25 10:16:15,802 INFO L226 Difference]: Without dead ends: 117 [2020-09-25 10:16:15,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=530, Invalid=1632, Unknown=0, NotChecked=0, Total=2162 [2020-09-25 10:16:15,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-25 10:16:15,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2020-09-25 10:16:15,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-25 10:16:15,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2020-09-25 10:16:15,811 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 79 [2020-09-25 10:16:15,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:16:15,812 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2020-09-25 10:16:15,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-25 10:16:15,812 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2020-09-25 10:16:15,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-25 10:16:15,818 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:16:15,819 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:16:15,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 10:16:15,819 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:16:15,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:16:15,820 INFO L82 PathProgramCache]: Analyzing trace with hash 518335641, now seen corresponding path program 8 times [2020-09-25 10:16:15,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:16:15,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127489954] [2020-09-25 10:16:15,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:16:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:15,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:15,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:18,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:20,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:20,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-09-25 10:16:20,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 10:16:20,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 10:16:20,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:20,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:20,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 10:16:20,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 10:16:20,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-09-25 10:16:20,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:20,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:16:20,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:20,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:20,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:20,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:16:20,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:20,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 10:16:20,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:20,886 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:20,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:16:20,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:16:20,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:16:20,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:16:20,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 10:16:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:20,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:21,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:21,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 10:16:21,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:21,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 618 [2020-09-25 10:16:21,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:21,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:21,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 10:16:21,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 10:16:21,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-25 10:16:21,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 10:16:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:16:22,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127489954] [2020-09-25 10:16:22,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:16:22,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-25 10:16:22,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022083726] [2020-09-25 10:16:22,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-25 10:16:22,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:16:22,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-25 10:16:22,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-09-25 10:16:22,401 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand 23 states. [2020-09-25 10:16:23,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 10:16:23,463 INFO L93 Difference]: Finished difference Result 171 states and 187 transitions. [2020-09-25 10:16:23,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-25 10:16:23,464 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 85 [2020-09-25 10:16:23,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 10:16:23,465 INFO L225 Difference]: With dead ends: 171 [2020-09-25 10:16:23,466 INFO L226 Difference]: Without dead ends: 123 [2020-09-25 10:16:23,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=503, Invalid=1303, Unknown=0, NotChecked=0, Total=1806 [2020-09-25 10:16:23,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-25 10:16:23,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2020-09-25 10:16:23,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-09-25 10:16:23,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2020-09-25 10:16:23,482 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 85 [2020-09-25 10:16:23,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 10:16:23,483 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2020-09-25 10:16:23,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-25 10:16:23,485 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2020-09-25 10:16:23,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-25 10:16:23,486 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 10:16:23,487 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 10:16:23,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 10:16:23,487 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 10:16:23,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 10:16:23,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1673467541, now seen corresponding path program 9 times [2020-09-25 10:16:23,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 10:16:23,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636335099] [2020-09-25 10:16:23,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 10:16:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:23,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:23,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:26,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:28,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:28,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-09-25 10:16:28,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 10:16:28,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-25 10:16:28,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:28,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:28,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-25 10:16:28,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 10:16:28,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-09-25 10:16:28,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:16:28,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 10:16:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:28,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:28,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:28,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 10:16:28,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:28,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 10:16:28,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:28,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:28,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 10:16:28,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 10:16:28,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 10:16:28,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:16:28,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 10:16:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 10:16:28,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 10:16:29,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 10:16:29,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 10:16:29,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 10:16:29,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 769 [2020-09-25 10:16:29,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 10:16:29,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.1 [2020-09-25 10:16:29,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-25 10:16:29,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 10:16:29,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-25 10:16:29,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 10:16:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 10:16:29,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636335099] [2020-09-25 10:16:29,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 10:16:29,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-25 10:16:29,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588718926] [2020-09-25 10:16:29,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-25 10:16:29,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 10:16:29,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-25 10:16:29,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-09-25 10:16:29,865 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand 25 states.