/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:18:48,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:18:48,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:18:48,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:18:48,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:18:48,646 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:18:48,647 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:18:48,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:18:48,651 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:18:48,652 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:18:48,652 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:18:48,657 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:18:48,657 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:18:48,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:18:48,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:18:48,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:18:48,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:18:48,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:18:48,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:18:48,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:18:48,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:18:48,682 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:18:48,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:18:48,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:18:48,688 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:18:48,689 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:18:48,691 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:18:48,694 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:18:48,695 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:18:48,697 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:18:48,698 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:18:48,698 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:18:48,699 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:18:48,701 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:18:48,702 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:18:48,702 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:18:48,703 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:18:48,703 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:18:48,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:18:48,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:18:48,714 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:18:48,717 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 23:18:48,761 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:18:48,761 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:18:48,763 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:18:48,763 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:18:48,764 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:18:48,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:18:48,765 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:18:48,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:18:48,765 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:18:48,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:18:48,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:18:48,766 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:18:48,766 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:18:48,766 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:18:48,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:18:48,766 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:18:48,767 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:18:48,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:18:48,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:18:48,767 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:18:48,767 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:18:48,767 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:18:48,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:18:48,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:18:48,769 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:18:48,770 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:18:48,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:18:48,770 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:18:48,770 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:18:48,770 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:18:49,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:18:49,149 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:18:49,154 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:18:49,156 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:18:49,162 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:18:49,163 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum3.c [2020-10-13 23:18:49,231 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64b5b5fab/cf0338b62e21483a96b39bba42ab756e/FLAGf46412bc5 [2020-10-13 23:18:49,709 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:18:49,711 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum3.c [2020-10-13 23:18:49,720 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64b5b5fab/cf0338b62e21483a96b39bba42ab756e/FLAGf46412bc5 [2020-10-13 23:18:50,074 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64b5b5fab/cf0338b62e21483a96b39bba42ab756e [2020-10-13 23:18:50,082 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:18:50,084 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:18:50,085 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:18:50,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:18:50,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:18:50,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:18:50" (1/1) ... [2020-10-13 23:18:50,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8099dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:50, skipping insertion in model container [2020-10-13 23:18:50,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:18:50" (1/1) ... [2020-10-13 23:18:50,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:18:50,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:18:50,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:18:50,304 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:18:50,328 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:18:50,437 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:18:50,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:50 WrapperNode [2020-10-13 23:18:50,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:18:50,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:18:50,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:18:50,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:18:50,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:50" (1/1) ... [2020-10-13 23:18:50,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:50" (1/1) ... [2020-10-13 23:18:50,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:50" (1/1) ... [2020-10-13 23:18:50,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:50" (1/1) ... [2020-10-13 23:18:50,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:50" (1/1) ... [2020-10-13 23:18:50,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:50" (1/1) ... [2020-10-13 23:18:50,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:50" (1/1) ... [2020-10-13 23:18:50,485 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:18:50,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:18:50,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:18:50,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:18:50,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:18:50,544 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:18:50,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:18:50,545 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 23:18:50,545 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:18:50,545 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:18:50,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:18:50,546 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 23:18:50,546 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 23:18:50,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:18:50,546 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-13 23:18:50,546 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:18:50,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 23:18:50,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:18:50,547 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:18:50,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:18:50,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:18:50,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:18:50,951 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:18:50,951 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-13 23:18:50,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:18:50 BoogieIcfgContainer [2020-10-13 23:18:50,956 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:18:50,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:18:50,958 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:18:50,961 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:18:50,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:18:50" (1/3) ... [2020-10-13 23:18:50,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2434d4a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:18:50, skipping insertion in model container [2020-10-13 23:18:50,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:50" (2/3) ... [2020-10-13 23:18:50,963 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2434d4a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:18:50, skipping insertion in model container [2020-10-13 23:18:50,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:18:50" (3/3) ... [2020-10-13 23:18:50,965 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum3.c [2020-10-13 23:18:50,974 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:18:50,981 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:18:50,995 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:18:51,022 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:18:51,022 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:18:51,022 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:18:51,023 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:18:51,023 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:18:51,023 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:18:51,023 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:18:51,024 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:18:51,044 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-13 23:18:51,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 23:18:51,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:18:51,052 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] [2020-10-13 23:18:51,052 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:18:51,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:18:51,057 INFO L82 PathProgramCache]: Analyzing trace with hash 303510615, now seen corresponding path program 1 times [2020-10-13 23:18:51,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:18:51,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892399315] [2020-10-13 23:18:51,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:18:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:51,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:51,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:51,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:51,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:51,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:51,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:51,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:51,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:52,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:52,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 23:18:52,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:18:52,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 978 [2020-10-13 23:18:52,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:52,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:52,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:18:52,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 23:18:52,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:18:52,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 23:18:52,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:18:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:52,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:52,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:52,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:18:52,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:18:52,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:18:52,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:52,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:52,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:18:52,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:18:52,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:18:52,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:18:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:18:52,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892399315] [2020-10-13 23:18:52,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:18:52,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:18:52,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772753056] [2020-10-13 23:18:52,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:18:52,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:18:52,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:18:52,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:18:52,321 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-10-13 23:18:52,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:18:52,463 INFO L93 Difference]: Finished difference Result 71 states and 99 transitions. [2020-10-13 23:18:52,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:18:52,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-13 23:18:52,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:18:52,473 INFO L225 Difference]: With dead ends: 71 [2020-10-13 23:18:52,474 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 23:18:52,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:18:52,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 23:18:52,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-13 23:18:52,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 23:18:52,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-10-13 23:18:52,516 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 24 [2020-10-13 23:18:52,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:18:52,517 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-10-13 23:18:52,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:18:52,517 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-10-13 23:18:52,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 23:18:52,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:18:52,519 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] [2020-10-13 23:18:52,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:18:52,519 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:18:52,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:18:52,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1522706885, now seen corresponding path program 1 times [2020-10-13 23:18:52,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:18:52,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099940425] [2020-10-13 23:18:52,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:18:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:52,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:52,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:52,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:52,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:52,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:52,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:52,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:53,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:55,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:55,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 23:18:55,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:18:55,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2935 [2020-10-13 23:18:55,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:55,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:55,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:18:55,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:18:55,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:18:55,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:18:55,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:18:55,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:55,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:55,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:55,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:18:55,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:18:55,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:18:55,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:55,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:55,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:18:55,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:18:55,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:18:55,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:18:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:18:55,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099940425] [2020-10-13 23:18:55,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:18:55,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:18:55,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197096687] [2020-10-13 23:18:55,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:18:55,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:18:55,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:18:55,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:18:55,552 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 4 states. [2020-10-13 23:18:55,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:18:55,707 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2020-10-13 23:18:55,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:18:55,708 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-10-13 23:18:55,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:18:55,710 INFO L225 Difference]: With dead ends: 57 [2020-10-13 23:18:55,711 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:18:55,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:18:55,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:18:55,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-13 23:18:55,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 23:18:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-10-13 23:18:55,738 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 24 [2020-10-13 23:18:55,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:18:55,739 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-10-13 23:18:55,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:18:55,739 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-10-13 23:18:55,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 23:18:55,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:18:55,741 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] [2020-10-13 23:18:55,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:18:55,742 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:18:55,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:18:55,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1444799747, now seen corresponding path program 1 times [2020-10-13 23:18:55,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:18:55,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882806398] [2020-10-13 23:18:55,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:18:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:55,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:55,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:55,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:55,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:55,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:55,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:55,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:57,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:00,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 23:19:00,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:19:00,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:19:00,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:00,768 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:00,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:19:00,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:00,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 23:19:00,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:19:00,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:00,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:00,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:00,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:00,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:19:00,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:00,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:00,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:00,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:00,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:00,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:00,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:19:00,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882806398] [2020-10-13 23:19:00,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:19:00,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 23:19:00,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079037801] [2020-10-13 23:19:00,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:19:00,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:00,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:19:00,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:19:00,906 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 6 states. [2020-10-13 23:19:01,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:01,138 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2020-10-13 23:19:01,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:19:01,139 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-13 23:19:01,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:01,140 INFO L225 Difference]: With dead ends: 49 [2020-10-13 23:19:01,140 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 23:19:01,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:19:01,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 23:19:01,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-13 23:19:01,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 23:19:01,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2020-10-13 23:19:01,158 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 26 [2020-10-13 23:19:01,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:01,159 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2020-10-13 23:19:01,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:19:01,160 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2020-10-13 23:19:01,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 23:19:01,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:01,162 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] [2020-10-13 23:19:01,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:19:01,162 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:01,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:01,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1309005887, now seen corresponding path program 1 times [2020-10-13 23:19:01,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:01,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535910091] [2020-10-13 23:19:01,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:01,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:01,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:01,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:01,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:01,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:01,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:01,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:01,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:01,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:01,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:01,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:01,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:06,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:06,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 23:19:06,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:19:06,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:19:06,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:06,183 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:06,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:19:06,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:06,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 23:19:06,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:06,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:06,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:06,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:06,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:06,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:06,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:19:06,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:06,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:06,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:06,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:06,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:06,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:06,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:19:06,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535910091] [2020-10-13 23:19:06,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:19:06,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 23:19:06,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152194169] [2020-10-13 23:19:06,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:19:06,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:06,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:19:06,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:19:06,282 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand 5 states. [2020-10-13 23:19:06,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:06,524 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2020-10-13 23:19:06,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:19:06,525 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-13 23:19:06,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:06,527 INFO L225 Difference]: With dead ends: 74 [2020-10-13 23:19:06,527 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 23:19:06,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 23:19:06,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 23:19:06,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2020-10-13 23:19:06,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 23:19:06,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-13 23:19:06,559 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 28 [2020-10-13 23:19:06,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:06,560 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-13 23:19:06,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:19:06,560 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-13 23:19:06,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 23:19:06,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:06,563 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, 1, 1] [2020-10-13 23:19:06,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:19:06,563 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:06,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:06,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1627637175, now seen corresponding path program 1 times [2020-10-13 23:19:06,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:06,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779697346] [2020-10-13 23:19:06,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:06,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:06,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:06,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:06,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:06,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:06,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:09,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:11,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:11,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 23:19:11,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:19:11,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 23:19:11,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:11,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:11,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:19:11,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:11,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 23:19:11,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:11,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:11,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:11,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:11,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:11,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:11,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:19:11,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:11,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:11,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:11,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:11,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:11,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:11,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 23:19:11,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779697346] [2020-10-13 23:19:11,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:11,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:19:11,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438217079] [2020-10-13 23:19:11,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:19:11,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:11,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:19:11,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:19:11,654 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 6 states. [2020-10-13 23:19:11,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:11,862 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2020-10-13 23:19:11,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:19:11,863 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-10-13 23:19:11,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:11,864 INFO L225 Difference]: With dead ends: 76 [2020-10-13 23:19:11,864 INFO L226 Difference]: Without dead ends: 51 [2020-10-13 23:19:11,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 23:19:11,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-13 23:19:11,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-13 23:19:11,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 23:19:11,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2020-10-13 23:19:11,873 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 38 [2020-10-13 23:19:11,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:11,873 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2020-10-13 23:19:11,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:19:11,873 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2020-10-13 23:19:11,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 23:19:11,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:11,875 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:11,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:19:11,876 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:11,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:11,876 INFO L82 PathProgramCache]: Analyzing trace with hash -324073365, now seen corresponding path program 2 times [2020-10-13 23:19:11,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:11,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874765347] [2020-10-13 23:19:11,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:11,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:11,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:12,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:13,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:13,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:14,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:14,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:15,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:15,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:16,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:16,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:16,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:17,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:17,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 23:19:17,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 23:19:17,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5131 [2020-10-13 23:19:17,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:17,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:17,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:19:17,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:17,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 23:19:17,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:17,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:17,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:17,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:17,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:17,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:17,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:17,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:19:17,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:17,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:17,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:17,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:17,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:17,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-13 23:19:17,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874765347] [2020-10-13 23:19:17,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:17,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 23:19:17,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259094598] [2020-10-13 23:19:17,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:19:17,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:17,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:19:17,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:19:17,093 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 5 states. [2020-10-13 23:19:17,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:17,254 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2020-10-13 23:19:17,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 23:19:17,255 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2020-10-13 23:19:17,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:17,256 INFO L225 Difference]: With dead ends: 94 [2020-10-13 23:19:17,256 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 23:19:17,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:19:17,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 23:19:17,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-13 23:19:17,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 23:19:17,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-13 23:19:17,277 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 50 [2020-10-13 23:19:17,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:17,280 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-13 23:19:17,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:19:17,281 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-13 23:19:17,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 23:19:17,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:17,285 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:17,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:19:17,286 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:17,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:17,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1396141527, now seen corresponding path program 3 times [2020-10-13 23:19:17,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:17,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561768978] [2020-10-13 23:19:17,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:17,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:17,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:18,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:18,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:19,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:20,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:20,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:21,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:21,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:22,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:22,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:22,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 23:19:22,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 23:19:22,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5151 [2020-10-13 23:19:22,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:22,486 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:22,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 23:19:22,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:22,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 23:19:22,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:24,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:24,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:24,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:24,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:24,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:24,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:19:24,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:24,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:24,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:24,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:24,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:24,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:19:24,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561768978] [2020-10-13 23:19:24,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:24,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 23:19:24,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596391209] [2020-10-13 23:19:24,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 23:19:24,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:24,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 23:19:24,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:19:24,204 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 23 states. [2020-10-13 23:19:25,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:25,852 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2020-10-13 23:19:25,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 23:19:25,852 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 52 [2020-10-13 23:19:25,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:25,854 INFO L225 Difference]: With dead ends: 96 [2020-10-13 23:19:25,854 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 23:19:25,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 23:19:25,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 23:19:25,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2020-10-13 23:19:25,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 23:19:25,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2020-10-13 23:19:25,867 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 52 [2020-10-13 23:19:25,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:25,867 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2020-10-13 23:19:25,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 23:19:25,867 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2020-10-13 23:19:25,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 23:19:25,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:25,869 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:25,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:19:25,869 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:25,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:25,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1834992487, now seen corresponding path program 4 times [2020-10-13 23:19:25,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:25,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664146390] [2020-10-13 23:19:25,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:25,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:25,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:25,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:25,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:26,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:30,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:30,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 23:19:30,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:19:30,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 23:19:30,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:30,891 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:30,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:19:30,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:30,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:19:30,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:30,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:30,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:30,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:30,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:30,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:30,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:30,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 23:19:30,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:30,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:30,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:30,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:30,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:30,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 23:19:30,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664146390] [2020-10-13 23:19:30,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:30,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:19:30,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329919644] [2020-10-13 23:19:31,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:19:31,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:31,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:19:31,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:19:31,002 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand 10 states. [2020-10-13 23:19:31,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:31,314 INFO L93 Difference]: Finished difference Result 158 states and 180 transitions. [2020-10-13 23:19:31,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:19:31,314 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2020-10-13 23:19:31,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:31,316 INFO L225 Difference]: With dead ends: 158 [2020-10-13 23:19:31,316 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 23:19:31,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:19:31,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 23:19:31,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-13 23:19:31,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 23:19:31,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2020-10-13 23:19:31,341 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 54 [2020-10-13 23:19:31,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:31,341 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2020-10-13 23:19:31,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:19:31,342 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2020-10-13 23:19:31,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 23:19:31,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:31,346 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:31,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:19:31,346 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:31,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:31,350 INFO L82 PathProgramCache]: Analyzing trace with hash 235028005, now seen corresponding path program 5 times [2020-10-13 23:19:31,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:31,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576434414] [2020-10-13 23:19:31,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:31,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:31,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:31,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:31,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:31,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:31,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:32,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:36,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:36,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 23:19:36,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:19:36,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:19:36,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:36,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:36,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:19:36,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:36,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:19:36,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:36,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:36,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:36,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:36,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:36,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:36,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:19:36,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:36,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:36,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:36,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:36,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:36,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:19:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 23:19:36,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576434414] [2020-10-13 23:19:36,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:36,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:19:36,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939026338] [2020-10-13 23:19:36,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:19:36,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:36,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:19:36,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:19:36,481 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand 10 states. [2020-10-13 23:19:36,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:36,764 INFO L93 Difference]: Finished difference Result 125 states and 145 transitions. [2020-10-13 23:19:36,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 23:19:36,765 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-10-13 23:19:36,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:36,766 INFO L225 Difference]: With dead ends: 125 [2020-10-13 23:19:36,766 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 23:19:36,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-13 23:19:36,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 23:19:36,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-13 23:19:36,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 23:19:36,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-10-13 23:19:36,774 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 56 [2020-10-13 23:19:36,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:36,775 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-10-13 23:19:36,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:19:36,775 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-10-13 23:19:36,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 23:19:36,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:36,776 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-13 23:19:36,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:19:36,777 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:36,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:36,777 INFO L82 PathProgramCache]: Analyzing trace with hash 44183323, now seen corresponding path program 6 times [2020-10-13 23:19:36,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:36,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871138452] [2020-10-13 23:19:36,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:36,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:37,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:38,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:39,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:40,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:41,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:41,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:42,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:42,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 23:19:42,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:19:42,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5257 [2020-10-13 23:19:42,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:42,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:42,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 23:19:42,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:42,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 23:19:42,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:44,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:44,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:44,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:44,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:44,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:44,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:44,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:19:44,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:44,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:44,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:44,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:44,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:44,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:19:44,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871138452] [2020-10-13 23:19:44,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:44,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 23:19:44,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759064457] [2020-10-13 23:19:44,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 23:19:44,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:44,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 23:19:44,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2013, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 23:19:44,974 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 47 states. [2020-10-13 23:19:49,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:49,045 INFO L93 Difference]: Finished difference Result 166 states and 184 transitions. [2020-10-13 23:19:49,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 23:19:49,046 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 66 [2020-10-13 23:19:49,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:49,050 INFO L225 Difference]: With dead ends: 166 [2020-10-13 23:19:49,050 INFO L226 Difference]: Without dead ends: 160 [2020-10-13 23:19:49,053 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=377, Invalid=5025, Unknown=0, NotChecked=0, Total=5402 [2020-10-13 23:19:49,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-13 23:19:49,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 104. [2020-10-13 23:19:49,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 23:19:49,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2020-10-13 23:19:49,066 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 115 transitions. Word has length 66 [2020-10-13 23:19:49,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:49,067 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 115 transitions. [2020-10-13 23:19:49,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 23:19:49,067 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 115 transitions. [2020-10-13 23:19:49,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 23:19:49,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:49,068 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 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] [2020-10-13 23:19:49,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:19:49,069 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:49,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:49,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1157841959, now seen corresponding path program 7 times [2020-10-13 23:19:49,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:49,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872999634] [2020-10-13 23:19:49,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:49,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:49,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:49,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:49,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:49,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:54,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:54,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 23:19:54,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:19:54,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:19:54,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:54,084 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:54,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:19:54,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:54,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:19:54,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:54,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:54,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:54,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:54,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:54,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:54,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:54,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:19:54,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:54,163 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:54,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:54,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:54,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:54,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-13 23:19:54,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872999634] [2020-10-13 23:19:54,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:54,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:19:54,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997735535] [2020-10-13 23:19:54,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:19:54,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:54,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:19:54,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:19:54,171 INFO L87 Difference]: Start difference. First operand 104 states and 115 transitions. Second operand 12 states. [2020-10-13 23:19:54,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:54,595 INFO L93 Difference]: Finished difference Result 202 states and 224 transitions. [2020-10-13 23:19:54,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:19:54,595 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-10-13 23:19:54,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:54,597 INFO L225 Difference]: With dead ends: 202 [2020-10-13 23:19:54,597 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 23:19:54,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:19:54,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 23:19:54,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-13 23:19:54,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 23:19:54,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2020-10-13 23:19:54,610 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 68 [2020-10-13 23:19:54,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:54,611 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2020-10-13 23:19:54,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:19:54,611 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2020-10-13 23:19:54,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 23:19:54,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:54,613 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 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] [2020-10-13 23:19:54,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:19:54,613 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:54,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:54,613 INFO L82 PathProgramCache]: Analyzing trace with hash -644181481, now seen corresponding path program 8 times [2020-10-13 23:19:54,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:54,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398983419] [2020-10-13 23:19:54,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:54,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:54,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:54,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:54,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:55,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:55,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:55,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:59,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:59,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 23:19:59,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:19:59,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:19:59,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:59,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:59,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:19:59,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:59,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 23:19:59,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:59,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:59,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:59,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:59,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:59,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:59,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:19:59,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:59,724 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:59,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:59,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:59,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:59,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-13 23:19:59,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398983419] [2020-10-13 23:19:59,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:59,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:19:59,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284096532] [2020-10-13 23:19:59,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:19:59,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:59,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:19:59,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:19:59,734 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand 12 states. [2020-10-13 23:20:00,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:00,139 INFO L93 Difference]: Finished difference Result 155 states and 175 transitions. [2020-10-13 23:20:00,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:20:00,139 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 70 [2020-10-13 23:20:00,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:00,140 INFO L225 Difference]: With dead ends: 155 [2020-10-13 23:20:00,140 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 23:20:00,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:20:00,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 23:20:00,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-13 23:20:00,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 23:20:00,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2020-10-13 23:20:00,160 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 70 [2020-10-13 23:20:00,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:00,160 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2020-10-13 23:20:00,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:20:00,160 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2020-10-13 23:20:00,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 23:20:00,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:00,164 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-10-13 23:20:00,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:20:00,166 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:00,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:00,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1453964429, now seen corresponding path program 9 times [2020-10-13 23:20:00,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:00,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795599043] [2020-10-13 23:20:00,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:00,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:00,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:01,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:03,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:03,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:04,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:05,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:05,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:05,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 23:20:05,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 23:20:05,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5368 [2020-10-13 23:20:05,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:05,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:05,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-13 23:20:05,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:05,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-13 23:20:05,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:08,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:08,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:08,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:08,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:08,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:08,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:08,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:20:08,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:08,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:08,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:08,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:08,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:08,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 23:20:08,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795599043] [2020-10-13 23:20:08,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:08,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 23:20:08,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668692800] [2020-10-13 23:20:08,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 23:20:08,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:08,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 23:20:08,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1772, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 23:20:08,123 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand 44 states. [2020-10-13 23:20:09,128 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 85 [2020-10-13 23:20:11,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:11,416 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2020-10-13 23:20:11,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 23:20:11,417 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 80 [2020-10-13 23:20:11,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:11,418 INFO L225 Difference]: With dead ends: 138 [2020-10-13 23:20:11,418 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 23:20:11,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 8 SyntacticMatches, 7 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=239, Invalid=3301, Unknown=0, NotChecked=0, Total=3540 [2020-10-13 23:20:11,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 23:20:11,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 126. [2020-10-13 23:20:11,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-13 23:20:11,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 137 transitions. [2020-10-13 23:20:11,430 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 137 transitions. Word has length 80 [2020-10-13 23:20:11,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:11,430 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 137 transitions. [2020-10-13 23:20:11,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 23:20:11,431 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 137 transitions. [2020-10-13 23:20:11,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 23:20:11,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:11,433 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 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] [2020-10-13 23:20:11,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:20:11,433 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:11,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:11,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1969126197, now seen corresponding path program 10 times [2020-10-13 23:20:11,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:11,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855036649] [2020-10-13 23:20:11,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:11,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:11,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:11,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:11,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:11,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:15,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:16,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:16,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 23:20:16,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:20:16,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:20:16,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:16,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:16,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:20:16,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:16,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:20:16,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:16,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:16,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:16,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:16,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:16,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:16,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:16,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:20:16,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:16,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:16,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:16,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:16,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:16,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:20:16,596 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-13 23:20:16,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855036649] [2020-10-13 23:20:16,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:16,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:20:16,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099694184] [2020-10-13 23:20:16,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:20:16,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:16,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:20:16,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:20:16,599 INFO L87 Difference]: Start difference. First operand 126 states and 137 transitions. Second operand 14 states. [2020-10-13 23:20:17,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:17,376 INFO L93 Difference]: Finished difference Result 246 states and 268 transitions. [2020-10-13 23:20:17,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:20:17,379 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2020-10-13 23:20:17,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:17,381 INFO L225 Difference]: With dead ends: 246 [2020-10-13 23:20:17,386 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 23:20:17,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:20:17,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 23:20:17,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-13 23:20:17,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 23:20:17,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 139 transitions. [2020-10-13 23:20:17,410 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 139 transitions. Word has length 82 [2020-10-13 23:20:17,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:17,410 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 139 transitions. [2020-10-13 23:20:17,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:20:17,411 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 139 transitions. [2020-10-13 23:20:17,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 23:20:17,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:17,412 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 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] [2020-10-13 23:20:17,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:20:17,413 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:17,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:17,413 INFO L82 PathProgramCache]: Analyzing trace with hash -2139842935, now seen corresponding path program 11 times [2020-10-13 23:20:17,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:17,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165539779] [2020-10-13 23:20:17,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:17,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:17,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:17,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:17,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:20,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:22,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:22,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 23:20:22,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 23:20:22,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:20:22,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:22,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:22,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:20:22,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:22,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:20:22,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:22,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:22,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:22,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:22,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:22,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:22,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:20:22,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:22,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:22,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:22,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:22,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:22,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:20:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-10-13 23:20:22,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165539779] [2020-10-13 23:20:22,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:22,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:20:22,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725445084] [2020-10-13 23:20:22,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:20:22,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:22,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:20:22,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:20:22,583 INFO L87 Difference]: Start difference. First operand 128 states and 139 transitions. Second operand 14 states. [2020-10-13 23:20:23,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:23,112 INFO L93 Difference]: Finished difference Result 185 states and 205 transitions. [2020-10-13 23:20:23,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 23:20:23,112 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 84 [2020-10-13 23:20:23,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:23,114 INFO L225 Difference]: With dead ends: 185 [2020-10-13 23:20:23,114 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 23:20:23,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2020-10-13 23:20:23,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 23:20:23,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-13 23:20:23,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 23:20:23,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2020-10-13 23:20:23,124 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 84 [2020-10-13 23:20:23,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:23,124 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2020-10-13 23:20:23,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:20:23,124 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2020-10-13 23:20:23,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-13 23:20:23,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:23,126 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 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] [2020-10-13 23:20:23,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:20:23,126 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:23,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:23,126 INFO L82 PathProgramCache]: Analyzing trace with hash -25142657, now seen corresponding path program 12 times [2020-10-13 23:20:23,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:23,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952409708] [2020-10-13 23:20:23,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:23,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:23,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:24,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:25,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:27,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:28,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:28,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-13 23:20:28,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:20:28,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5250 [2020-10-13 23:20:28,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:28,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:28,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-13 23:20:28,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:28,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-13 23:20:28,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:35,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:35,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:35,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:35,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:35,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:35,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:20:35,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:35,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:35,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:35,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:35,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:35,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 12 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:20:35,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952409708] [2020-10-13 23:20:35,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:35,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-13 23:20:35,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469075068] [2020-10-13 23:20:35,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-13 23:20:35,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:35,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-13 23:20:35,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=4917, Unknown=0, NotChecked=0, Total=5256 [2020-10-13 23:20:35,212 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand 73 states. [2020-10-13 23:20:37,507 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-10-13 23:20:37,848 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 47 [2020-10-13 23:20:38,180 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2020-10-13 23:20:38,491 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2020-10-13 23:20:39,473 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2020-10-13 23:20:41,250 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 39 [2020-10-13 23:20:42,014 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 41 [2020-10-13 23:20:43,058 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 31 [2020-10-13 23:20:44,734 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-10-13 23:20:45,275 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-13 23:20:45,565 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2020-10-13 23:20:45,844 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-10-13 23:20:46,184 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-13 23:20:46,553 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-13 23:20:46,899 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2020-10-13 23:20:55,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:55,167 INFO L93 Difference]: Finished difference Result 261 states and 291 transitions. [2020-10-13 23:20:55,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-13 23:20:55,167 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 94 [2020-10-13 23:20:55,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:55,170 INFO L225 Difference]: With dead ends: 261 [2020-10-13 23:20:55,171 INFO L226 Difference]: Without dead ends: 233 [2020-10-13 23:20:55,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3247 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=1183, Invalid=14317, Unknown=0, NotChecked=0, Total=15500 [2020-10-13 23:20:55,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-13 23:20:55,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 188. [2020-10-13 23:20:55,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-13 23:20:55,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 203 transitions. [2020-10-13 23:20:55,195 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 203 transitions. Word has length 94 [2020-10-13 23:20:55,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:55,196 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 203 transitions. [2020-10-13 23:20:55,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-13 23:20:55,196 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 203 transitions. [2020-10-13 23:20:55,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 23:20:55,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:55,198 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 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] [2020-10-13 23:20:55,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:20:55,198 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:55,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:55,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1965506109, now seen corresponding path program 13 times [2020-10-13 23:20:55,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:55,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221191621] [2020-10-13 23:20:55,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:55,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:55,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:55,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:55,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:00,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:00,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 23:21:00,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:21:00,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:21:00,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:00,223 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:00,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:21:00,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:21:00,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 23:21:00,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:00,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:21:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:00,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:00,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:00,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:21:00,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:21:00,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:21:00,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:00,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:00,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:21:00,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:21:00,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:21:00,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-10-13 23:21:00,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221191621] [2020-10-13 23:21:00,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:21:00,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:21:00,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669701657] [2020-10-13 23:21:00,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:21:00,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:21:00,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:21:00,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:21:00,418 INFO L87 Difference]: Start difference. First operand 188 states and 203 transitions. Second operand 16 states. [2020-10-13 23:21:01,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:21:01,311 INFO L93 Difference]: Finished difference Result 292 states and 313 transitions. [2020-10-13 23:21:01,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:21:01,312 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 96 [2020-10-13 23:21:01,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:21:01,313 INFO L225 Difference]: With dead ends: 292 [2020-10-13 23:21:01,313 INFO L226 Difference]: Without dead ends: 98 [2020-10-13 23:21:01,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:21:01,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-13 23:21:01,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-13 23:21:01,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 23:21:01,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 103 transitions. [2020-10-13 23:21:01,324 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 103 transitions. Word has length 96 [2020-10-13 23:21:01,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:21:01,324 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 103 transitions. [2020-10-13 23:21:01,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:21:01,325 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 103 transitions. [2020-10-13 23:21:01,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 23:21:01,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:21:01,326 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 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] [2020-10-13 23:21:01,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:21:01,326 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:21:01,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:21:01,327 INFO L82 PathProgramCache]: Analyzing trace with hash -2004828355, now seen corresponding path program 14 times [2020-10-13 23:21:01,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:21:01,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617587724] [2020-10-13 23:21:01,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:21:01,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:01,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:01,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:01,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:01,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:06,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:06,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 23:21:06,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:21:06,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:21:06,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:06,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:06,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:21:06,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:21:06,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 23:21:06,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:06,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:21:06,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:06,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:06,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:06,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:21:06,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:21:06,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:21:06,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:06,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:06,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:21:06,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:21:06,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:21:06,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:06,549 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-10-13 23:21:06,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617587724] [2020-10-13 23:21:06,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:21:06,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:21:06,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161304746] [2020-10-13 23:21:06,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:21:06,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:21:06,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:21:06,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:21:06,551 INFO L87 Difference]: Start difference. First operand 97 states and 103 transitions. Second operand 16 states. [2020-10-13 23:21:07,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:21:07,343 INFO L93 Difference]: Finished difference Result 174 states and 190 transitions. [2020-10-13 23:21:07,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:21:07,344 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 96 [2020-10-13 23:21:07,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:21:07,345 INFO L225 Difference]: With dead ends: 174 [2020-10-13 23:21:07,346 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 23:21:07,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:21:07,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 23:21:07,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-13 23:21:07,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 23:21:07,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2020-10-13 23:21:07,356 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 96 [2020-10-13 23:21:07,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:21:07,356 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2020-10-13 23:21:07,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:21:07,356 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2020-10-13 23:21:07,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 23:21:07,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:21:07,357 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 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] [2020-10-13 23:21:07,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:21:07,358 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:21:07,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:21:07,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1666132209, now seen corresponding path program 15 times [2020-10-13 23:21:07,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:21:07,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149210363] [2020-10-13 23:21:07,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:21:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:07,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:09,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:12,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:12,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 23:21:12,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:21:12,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5098 [2020-10-13 23:21:12,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:12,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:12,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 86 [2020-10-13 23:21:12,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:21:12,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-13 23:21:12,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:21:14,991 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-10-13 23:21:15,162 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-10-13 23:21:15,661 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-10-13 23:21:15,836 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-13 23:21:16,030 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-13 23:21:16,219 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-10-13 23:21:16,415 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-10-13 23:21:16,619 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-10-13 23:21:16,809 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2020-10-13 23:21:17,797 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2020-10-13 23:21:18,059 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2020-10-13 23:21:18,305 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 23 [2020-10-13 23:21:18,550 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 27 [2020-10-13 23:21:18,838 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2020-10-13 23:21:19,096 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2020-10-13 23:21:20,294 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 36 [2020-10-13 23:21:25,299 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2020-10-13 23:21:28,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:21:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:28,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:28,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:28,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:21:28,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:21:28,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:21:28,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:28,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:28,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:21:28,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:21:28,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:21:28,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:28,498 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 9 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:21:28,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149210363] [2020-10-13 23:21:28,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:21:28,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-10-13 23:21:28,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835754935] [2020-10-13 23:21:28,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-10-13 23:21:28,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:21:28,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-10-13 23:21:28,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=6525, Unknown=0, NotChecked=0, Total=6972 [2020-10-13 23:21:28,503 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand 84 states. [2020-10-13 23:21:29,074 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 3 [2020-10-13 23:21:29,753 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 15 [2020-10-13 23:21:31,461 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2020-10-13 23:21:33,382 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2020-10-13 23:21:33,794 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-13 23:21:34,205 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 38 [2020-10-13 23:21:34,916 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 77 [2020-10-13 23:21:35,490 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2020-10-13 23:21:36,406 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 71 [2020-10-13 23:21:36,997 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2020-10-13 23:21:37,895 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 56 [2020-10-13 23:21:38,299 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-10-13 23:21:38,824 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 66 [2020-10-13 23:21:39,301 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2020-10-13 23:21:39,804 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-10-13 23:21:40,346 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2020-10-13 23:21:40,902 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-13 23:21:41,471 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-10-13 23:21:42,159 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2020-10-13 23:21:44,681 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2020-10-13 23:21:45,152 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-10-13 23:21:58,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:21:58,827 INFO L93 Difference]: Finished difference Result 224 states and 242 transitions. [2020-10-13 23:21:58,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-13 23:21:58,830 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 108 [2020-10-13 23:21:58,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:21:58,832 INFO L225 Difference]: With dead ends: 224 [2020-10-13 23:21:58,832 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 23:21:58,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 3 SyntacticMatches, 4 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4239 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=1023, Invalid=13739, Unknown=0, NotChecked=0, Total=14762 [2020-10-13 23:21:58,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 23:21:58,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-13 23:21:58,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 23:21:58,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 117 transitions. [2020-10-13 23:21:58,851 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 117 transitions. Word has length 108 [2020-10-13 23:21:58,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:21:58,851 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 117 transitions. [2020-10-13 23:21:58,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-10-13 23:21:58,851 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 117 transitions. [2020-10-13 23:21:58,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 23:21:58,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:21:58,853 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 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] [2020-10-13 23:21:58,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:21:58,853 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:21:58,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:21:58,854 INFO L82 PathProgramCache]: Analyzing trace with hash -743872209, now seen corresponding path program 16 times [2020-10-13 23:21:58,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:21:58,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956535602] [2020-10-13 23:21:58,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:21:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:58,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:58,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:58,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:58,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:03,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:03,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 23:22:03,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:22:03,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 23:22:03,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:03,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:03,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:22:03,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:22:03,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 23:22:03,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:22:04,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:04,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:04,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:04,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:04,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:04,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:22:04,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:04,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:04,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:04,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:04,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:04,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:22:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-13 23:22:04,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956535602] [2020-10-13 23:22:04,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:22:04,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:22:04,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951679557] [2020-10-13 23:22:04,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:22:04,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:04,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:22:04,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:22:04,177 INFO L87 Difference]: Start difference. First operand 111 states and 117 transitions. Second operand 18 states. [2020-10-13 23:22:05,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:05,360 INFO L93 Difference]: Finished difference Result 198 states and 214 transitions. [2020-10-13 23:22:05,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 23:22:05,365 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 110 [2020-10-13 23:22:05,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:05,366 INFO L225 Difference]: With dead ends: 198 [2020-10-13 23:22:05,366 INFO L226 Difference]: Without dead ends: 123 [2020-10-13 23:22:05,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-10-13 23:22:05,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-13 23:22:05,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-10-13 23:22:05,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-13 23:22:05,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 129 transitions. [2020-10-13 23:22:05,379 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 129 transitions. Word has length 110 [2020-10-13 23:22:05,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:05,379 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 129 transitions. [2020-10-13 23:22:05,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:22:05,380 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 129 transitions. [2020-10-13 23:22:05,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 23:22:05,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:05,381 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 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] [2020-10-13 23:22:05,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:22:05,381 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:05,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:05,381 INFO L82 PathProgramCache]: Analyzing trace with hash 868698083, now seen corresponding path program 17 times [2020-10-13 23:22:05,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:05,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661076893] [2020-10-13 23:22:05,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:05,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:10,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:10,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 23:22:10,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:10,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:22:10,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:10,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:10,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 92 [2020-10-13 23:22:10,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:22:10,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-13 23:22:10,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:22:15,019 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-10-13 23:22:15,606 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-10-13 23:22:20,577 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2020-10-13 23:22:20,969 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 23 [2020-10-13 23:22:23,640 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2020-10-13 23:22:24,255 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2020-10-13 23:22:24,860 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43