/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 12:30:26,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 12:30:26,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 12:30:26,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 12:30:26,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 12:30:26,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 12:30:26,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 12:30:26,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 12:30:26,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 12:30:26,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 12:30:26,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 12:30:26,670 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 12:30:26,670 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 12:30:26,673 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 12:30:26,676 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 12:30:26,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 12:30:26,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 12:30:26,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 12:30:26,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 12:30:26,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 12:30:26,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 12:30:26,698 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 12:30:26,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 12:30:26,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 12:30:26,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 12:30:26,704 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 12:30:26,705 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 12:30:26,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 12:30:26,709 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 12:30:26,710 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 12:30:26,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 12:30:26,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 12:30:26,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 12:30:26,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 12:30:26,715 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 12:30:26,715 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 12:30:26,716 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 12:30:26,716 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 12:30:26,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 12:30:26,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 12:30:26,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 12:30:26,720 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 12:30:26,771 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 12:30:26,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 12:30:26,774 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 12:30:26,775 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 12:30:26,775 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 12:30:26,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 12:30:26,776 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 12:30:26,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 12:30:26,777 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 12:30:26,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 12:30:26,778 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 12:30:26,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 12:30:26,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 12:30:26,779 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 12:30:26,779 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 12:30:26,779 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 12:30:26,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 12:30:26,780 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 12:30:26,780 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 12:30:26,780 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 12:30:26,780 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 12:30:26,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:30:26,781 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 12:30:26,781 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 12:30:26,781 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 12:30:26,781 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 12:30:26,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 12:30:26,782 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 12:30:26,782 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 12:30:26,782 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-09-25 12:30:27,278 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 12:30:27,296 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 12:30:27,301 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 12:30:27,303 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 12:30:27,303 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 12:30:27,305 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-25 12:30:27,397 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f273c9641/b26011eefc3b40b5aecd0e67758b13fb/FLAG7a6ae0985 [2020-09-25 12:30:27,943 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 12:30:27,944 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-09-25 12:30:27,955 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f273c9641/b26011eefc3b40b5aecd0e67758b13fb/FLAG7a6ae0985 [2020-09-25 12:30:28,284 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f273c9641/b26011eefc3b40b5aecd0e67758b13fb [2020-09-25 12:30:28,298 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 12:30:28,302 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 12:30:28,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 12:30:28,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 12:30:28,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 12:30:28,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:30:28" (1/1) ... [2020-09-25 12:30:28,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@425c36b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:30:28, skipping insertion in model container [2020-09-25 12:30:28,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:30:28" (1/1) ... [2020-09-25 12:30:28,325 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 12:30:28,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 12:30:28,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:30:28,591 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 12:30:28,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 12:30:28,631 INFO L208 MainTranslator]: Completed translation [2020-09-25 12:30:28,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:30:28 WrapperNode [2020-09-25 12:30:28,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 12:30:28,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 12:30:28,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 12:30:28,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 12:30:28,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:30:28" (1/1) ... [2020-09-25 12:30:28,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:30:28" (1/1) ... [2020-09-25 12:30:28,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:30:28" (1/1) ... [2020-09-25 12:30:28,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:30:28" (1/1) ... [2020-09-25 12:30:28,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:30:28" (1/1) ... [2020-09-25 12:30:28,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:30:28" (1/1) ... [2020-09-25 12:30:28,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:30:28" (1/1) ... [2020-09-25 12:30:28,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 12:30:28,762 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 12:30:28,762 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 12:30:28,762 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 12:30:28,763 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:30:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 12:30:28,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 12:30:28,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 12:30:28,836 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 12:30:28,836 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-25 12:30:28,837 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 12:30:28,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 12:30:28,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 12:30:28,837 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 12:30:28,838 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-09-25 12:30:28,838 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 12:30:28,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 12:30:28,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 12:30:28,838 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 12:30:28,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 12:30:28,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 12:30:28,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 12:30:28,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 12:30:28,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 12:30:29,180 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 12:30:29,181 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 12:30:29,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:30:29 BoogieIcfgContainer [2020-09-25 12:30:29,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 12:30:29,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 12:30:29,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 12:30:29,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 12:30:29,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:30:28" (1/3) ... [2020-09-25 12:30:29,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@521d87cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:30:29, skipping insertion in model container [2020-09-25 12:30:29,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:30:28" (2/3) ... [2020-09-25 12:30:29,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@521d87cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:30:29, skipping insertion in model container [2020-09-25 12:30:29,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:30:29" (3/3) ... [2020-09-25 12:30:29,209 INFO L109 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-09-25 12:30:29,218 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 12:30:29,226 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 12:30:29,245 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 12:30:29,273 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 12:30:29,273 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 12:30:29,273 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 12:30:29,273 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 12:30:29,273 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 12:30:29,273 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 12:30:29,273 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 12:30:29,274 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 12:30:29,296 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-09-25 12:30:29,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 12:30:29,305 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:30:29,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:30:29,306 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:30:29,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:30:29,313 INFO L82 PathProgramCache]: Analyzing trace with hash -2004589429, now seen corresponding path program 1 times [2020-09-25 12:30:29,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:30:29,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393756712] [2020-09-25 12:30:29,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:30:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:30:29,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:29,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:29,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:30:29,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 12:30:29,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:30:29,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 316 [2020-09-25 12:30:29,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:30:29,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:30:29,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 12:30:29,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 12:30:29,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 12:30:29,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 12:30:29,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:30:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:30:29,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:29,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:30:29,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 12:30:29,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:30:29,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 12:30:29,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:30:29,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:30:29,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:30:29,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:30:29,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:30:29,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:30:29,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 12:30:29,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:30:29,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:29,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:29,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:30:29,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 12:30:29,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:30:29,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-25 12:30:29,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:30:29,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:30:29,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:30:29,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:30:29,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:30:29,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:30:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:30:29,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393756712] [2020-09-25 12:30:29,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 12:30:29,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 12:30:29,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286083088] [2020-09-25 12:30:29,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 12:30:29,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:30:30,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 12:30:30,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 12:30:30,004 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 5 states. [2020-09-25 12:30:30,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:30:30,306 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2020-09-25 12:30:30,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 12:30:30,309 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-09-25 12:30:30,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:30:30,325 INFO L225 Difference]: With dead ends: 109 [2020-09-25 12:30:30,326 INFO L226 Difference]: Without dead ends: 68 [2020-09-25 12:30:30,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 12:30:30,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-25 12:30:30,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2020-09-25 12:30:30,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 12:30:30,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-09-25 12:30:30,396 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-09-25 12:30:30,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:30:30,397 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-09-25 12:30:30,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 12:30:30,397 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-09-25 12:30:30,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 12:30:30,399 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:30:30,399 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:30:30,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 12:30:30,400 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:30:30,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:30:30,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1596363536, now seen corresponding path program 1 times [2020-09-25 12:30:30,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:30:30,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377024465] [2020-09-25 12:30:30,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:30:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:30:30,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:30,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:30,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:32,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:30:32,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 12:30:32,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 12:30:32,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1839 [2020-09-25 12:30:32,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:30:32,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:30:32,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:30:32,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 12:30:32,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 12:30:32,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:30:32,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:30:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:30:32,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:32,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:30:32,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 12:30:32,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:30:32,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 12:30:32,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:30:32,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:30:32,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:30:32,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:30:32,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:30:32,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:30:32,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 12:30:32,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:30:32,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:32,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:32,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:30:32,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 12:30:32,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:30:32,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-25 12:30:32,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:30:32,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:30:32,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:30:32,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 12:30:32,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 12:30:32,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:30:32,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:30:32,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377024465] [2020-09-25 12:30:32,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:30:32,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 12:30:32,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911365545] [2020-09-25 12:30:32,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 12:30:32,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:30:32,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 12:30:32,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-09-25 12:30:32,648 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 14 states. [2020-09-25 12:30:33,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:30:33,543 INFO L93 Difference]: Finished difference Result 128 states and 145 transitions. [2020-09-25 12:30:33,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 12:30:33,543 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-09-25 12:30:33,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:30:33,546 INFO L225 Difference]: With dead ends: 128 [2020-09-25 12:30:33,546 INFO L226 Difference]: Without dead ends: 100 [2020-09-25 12:30:33,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2020-09-25 12:30:33,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-25 12:30:33,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 71. [2020-09-25 12:30:33,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-25 12:30:33,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2020-09-25 12:30:33,561 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 36 [2020-09-25 12:30:33,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:30:33,562 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2020-09-25 12:30:33,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 12:30:33,562 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2020-09-25 12:30:33,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-25 12:30:33,564 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:30:33,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:30:33,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 12:30:33,576 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:30:33,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:30:33,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1998641845, now seen corresponding path program 1 times [2020-09-25 12:30:33,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:30:33,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39080307] [2020-09-25 12:30:33,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:30:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:30:33,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:33,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:33,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:35,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:30:35,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-09-25 12:30:35,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 12:30:35,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1613 [2020-09-25 12:30:35,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:30:35,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:30:35,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 12:30:35,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-25 12:30:35,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 12:30:35,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:30:35,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:30:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:30:35,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:35,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:30:35,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 12:30:35,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:30:35,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-25 12:30:35,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:30:35,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:30:35,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:30:35,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:30:35,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:30:35,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:30:35,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 12:30:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:30:35,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:35,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:35,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:30:35,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 12:30:35,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:30:35,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-09-25 12:30:35,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:30:35,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:30:35,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:30:35,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 12:30:35,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 12:30:35,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 12:30:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:30:35,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39080307] [2020-09-25 12:30:35,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:30:35,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 12:30:35,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227637888] [2020-09-25 12:30:35,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 12:30:35,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:30:35,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 12:30:35,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-25 12:30:35,574 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 12 states. [2020-09-25 12:30:36,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:30:36,032 INFO L93 Difference]: Finished difference Result 161 states and 183 transitions. [2020-09-25 12:30:36,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 12:30:36,033 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-09-25 12:30:36,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:30:36,035 INFO L225 Difference]: With dead ends: 161 [2020-09-25 12:30:36,035 INFO L226 Difference]: Without dead ends: 113 [2020-09-25 12:30:36,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-09-25 12:30:36,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-25 12:30:36,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 88. [2020-09-25 12:30:36,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-25 12:30:36,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2020-09-25 12:30:36,059 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 43 [2020-09-25 12:30:36,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:30:36,059 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2020-09-25 12:30:36,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 12:30:36,060 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2020-09-25 12:30:36,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-25 12:30:36,066 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:30:36,067 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:30:36,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 12:30:36,068 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:30:36,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:30:36,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1913724704, now seen corresponding path program 1 times [2020-09-25 12:30:36,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:30:36,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651971391] [2020-09-25 12:30:36,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:30:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:30:36,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:36,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:36,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:37,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:38,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:39,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:41,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:30:41,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-25 12:30:41,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 12:30:41,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 12:30:41,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:30:41,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:30:41,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 12:30:41,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 12:30:41,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-09-25 12:30:41,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:30:41,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:30:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:30:41,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:41,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:30:41,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 12:30:41,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:30:41,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 12:30:41,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:30:41,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:30:41,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:30:41,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:30:41,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:30:41,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:30:41,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 12:30:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:30:41,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:41,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:41,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:30:41,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 12:30:41,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:30:41,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 684 [2020-09-25 12:30:41,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:30:41,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:30:41,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:30:41,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:30:41,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 12:30:41,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:30:42,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:30:42,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651971391] [2020-09-25 12:30:42,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:30:42,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 12:30:42,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390384453] [2020-09-25 12:30:42,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 12:30:42,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:30:42,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 12:30:42,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-09-25 12:30:42,128 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 15 states. [2020-09-25 12:30:42,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:30:42,970 INFO L93 Difference]: Finished difference Result 206 states and 234 transitions. [2020-09-25 12:30:42,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 12:30:42,970 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-09-25 12:30:42,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:30:42,973 INFO L225 Difference]: With dead ends: 206 [2020-09-25 12:30:42,976 INFO L226 Difference]: Without dead ends: 164 [2020-09-25 12:30:42,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2020-09-25 12:30:42,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-09-25 12:30:43,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 115. [2020-09-25 12:30:43,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-09-25 12:30:43,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2020-09-25 12:30:43,004 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 56 [2020-09-25 12:30:43,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:30:43,004 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2020-09-25 12:30:43,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 12:30:43,004 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2020-09-25 12:30:43,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-25 12:30:43,007 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:30:43,007 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, 1, 1, 1, 1, 1] [2020-09-25 12:30:43,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 12:30:43,009 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:30:43,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:30:43,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1773532393, now seen corresponding path program 2 times [2020-09-25 12:30:43,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:30:43,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991244605] [2020-09-25 12:30:43,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:30:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:30:43,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:43,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:43,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:46,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:30:46,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 12:30:46,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 12:30:46,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3401 [2020-09-25 12:30:46,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:30:46,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:30:46,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 12:30:46,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 12:30:46,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 12:30:46,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:30:46,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:30:46,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:30:46,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:46,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:30:46,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 12:30:46,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:30:46,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 12:30:46,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:30:46,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:30:46,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:30:46,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:30:46,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:30:46,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 12:30:46,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 12:30:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:30:46,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:46,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:46,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:30:46,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 12:30:46,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:30:46,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-09-25 12:30:46,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:30:46,683 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:30:46,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:30:46,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 12:30:46,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 12:30:46,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 12:30:46,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:30:46,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991244605] [2020-09-25 12:30:46,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:30:46,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-25 12:30:46,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491273569] [2020-09-25 12:30:46,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-25 12:30:46,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:30:46,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-25 12:30:46,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-09-25 12:30:46,858 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand 16 states. [2020-09-25 12:30:47,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:30:47,625 INFO L93 Difference]: Finished difference Result 200 states and 224 transitions. [2020-09-25 12:30:47,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-25 12:30:47,626 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2020-09-25 12:30:47,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:30:47,628 INFO L225 Difference]: With dead ends: 200 [2020-09-25 12:30:47,628 INFO L226 Difference]: Without dead ends: 137 [2020-09-25 12:30:47,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2020-09-25 12:30:47,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-25 12:30:47,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 112. [2020-09-25 12:30:47,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-25 12:30:47,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2020-09-25 12:30:47,652 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 57 [2020-09-25 12:30:47,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:30:47,653 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2020-09-25 12:30:47,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-25 12:30:47,653 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2020-09-25 12:30:47,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 12:30:47,657 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:30:47,657 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:30:47,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 12:30:47,657 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:30:47,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:30:47,658 INFO L82 PathProgramCache]: Analyzing trace with hash 890530765, now seen corresponding path program 2 times [2020-09-25 12:30:47,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:30:47,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011876721] [2020-09-25 12:30:47,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:30:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:30:47,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:47,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:47,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:49,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:49,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:49,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:51,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:51,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:52,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:52,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:52,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:30:52,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-25 12:30:52,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 12:30:52,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 12:30:52,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:30:52,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:30:52,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 12:30:52,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 12:30:52,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 12:30:52,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:30:52,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:30:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:30:52,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:52,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:30:52,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 12:30:52,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:30:52,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 12:30:52,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:30:52,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:30:52,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:30:52,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:30:52,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:30:52,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:30:52,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 12:30:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:30:52,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:52,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:52,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:53,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:54,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:30:54,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 12:30:54,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 12:30:54,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1831 [2020-09-25 12:30:54,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:30:54,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:30:54,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 12:30:54,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:30:54,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 12:30:54,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:30:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-25 12:30:54,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011876721] [2020-09-25 12:30:54,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:30:54,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 12:30:54,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934467958] [2020-09-25 12:30:54,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 12:30:54,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:30:54,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 12:30:54,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-09-25 12:30:54,902 INFO L87 Difference]: Start difference. First operand 112 states and 122 transitions. Second operand 17 states. [2020-09-25 12:30:55,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:30:55,529 INFO L93 Difference]: Finished difference Result 169 states and 187 transitions. [2020-09-25 12:30:55,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 12:30:55,530 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2020-09-25 12:30:55,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:30:55,531 INFO L225 Difference]: With dead ends: 169 [2020-09-25 12:30:55,531 INFO L226 Difference]: Without dead ends: 117 [2020-09-25 12:30:55,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2020-09-25 12:30:55,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-25 12:30:55,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 110. [2020-09-25 12:30:55,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-25 12:30:55,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2020-09-25 12:30:55,552 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 69 [2020-09-25 12:30:55,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:30:55,553 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2020-09-25 12:30:55,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 12:30:55,553 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2020-09-25 12:30:55,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-25 12:30:55,555 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:30:55,555 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:30:55,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 12:30:55,555 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:30:55,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:30:55,556 INFO L82 PathProgramCache]: Analyzing trace with hash -587190996, now seen corresponding path program 3 times [2020-09-25 12:30:55,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:30:55,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198476500] [2020-09-25 12:30:55,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:30:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:30:55,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:55,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:55,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:56,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:30:56,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:00,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:00,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-25 12:31:00,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 12:31:00,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 12:31:00,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:00,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:00,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-25 12:31:00,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 12:31:00,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-25 12:31:00,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:31:00,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:00,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:00,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:00,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 12:31:00,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:00,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-25 12:31:00,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:00,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:00,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:00,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:00,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:00,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:31:00,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 12:31:00,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:00,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:00,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:00,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:01,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:02,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:02,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 12:31:02,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 12:31:02,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1792 [2020-09-25 12:31:02,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:02,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:02,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 12:31:02,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:02,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-25 12:31:02,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:31:02,809 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-09-25 12:31:02,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198476500] [2020-09-25 12:31:02,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:02,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 12:31:02,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000459027] [2020-09-25 12:31:02,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 12:31:02,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:02,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 12:31:02,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-09-25 12:31:02,812 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand 18 states. [2020-09-25 12:31:03,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:03,824 INFO L93 Difference]: Finished difference Result 149 states and 163 transitions. [2020-09-25 12:31:03,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 12:31:03,826 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2020-09-25 12:31:03,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:03,828 INFO L225 Difference]: With dead ends: 149 [2020-09-25 12:31:03,828 INFO L226 Difference]: Without dead ends: 125 [2020-09-25 12:31:03,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2020-09-25 12:31:03,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-25 12:31:03,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2020-09-25 12:31:03,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-25 12:31:03,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2020-09-25 12:31:03,847 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 70 [2020-09-25 12:31:03,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:03,847 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2020-09-25 12:31:03,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 12:31:03,847 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2020-09-25 12:31:03,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-25 12:31:03,848 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:03,848 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, 1, 1, 1, 1, 1] [2020-09-25 12:31:03,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 12:31:03,849 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:03,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:03,849 INFO L82 PathProgramCache]: Analyzing trace with hash -53595619, now seen corresponding path program 3 times [2020-09-25 12:31:03,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:03,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016869052] [2020-09-25 12:31:03,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:03,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:03,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:03,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:08,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:08,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-09-25 12:31:08,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 12:31:08,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-25 12:31:08,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:08,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:08,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 12:31:08,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-25 12:31:08,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 12:31:08,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:08,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:08,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:08,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:08,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 12:31:08,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:08,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 12:31:08,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:08,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:08,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:08,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:08,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:08,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:08,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 12:31:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:08,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:09,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:09,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:09,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 12:31:09,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 12:31:09,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-09-25 12:31:09,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:09,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:09,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 12:31:09,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 12:31:09,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 12:31:09,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 12:31:09,330 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 12:31:09,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016869052] [2020-09-25 12:31:09,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 12:31:09,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-25 12:31:09,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465120091] [2020-09-25 12:31:09,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-25 12:31:09,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 12:31:09,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-25 12:31:09,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-09-25 12:31:09,332 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand 20 states. [2020-09-25 12:31:10,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 12:31:10,240 INFO L93 Difference]: Finished difference Result 254 states and 278 transitions. [2020-09-25 12:31:10,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-25 12:31:10,241 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 71 [2020-09-25 12:31:10,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 12:31:10,243 INFO L225 Difference]: With dead ends: 254 [2020-09-25 12:31:10,243 INFO L226 Difference]: Without dead ends: 179 [2020-09-25 12:31:10,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=236, Invalid=1246, Unknown=0, NotChecked=0, Total=1482 [2020-09-25 12:31:10,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-09-25 12:31:10,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 132. [2020-09-25 12:31:10,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-25 12:31:10,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 142 transitions. [2020-09-25 12:31:10,254 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 142 transitions. Word has length 71 [2020-09-25 12:31:10,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 12:31:10,255 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 142 transitions. [2020-09-25 12:31:10,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-25 12:31:10,255 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 142 transitions. [2020-09-25 12:31:10,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-25 12:31:10,256 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 12:31:10,256 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 12:31:10,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 12:31:10,256 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 12:31:10,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 12:31:10,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1007759128, now seen corresponding path program 4 times [2020-09-25 12:31:10,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 12:31:10,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529478755] [2020-09-25 12:31:10,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 12:31:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:10,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:10,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:10,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:11,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:14,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:15,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:15,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:15,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-09-25 12:31:15,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 12:31:15,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-09-25 12:31:15,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:15,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:15,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 12:31:15,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 12:31:15,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-09-25 12:31:15,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:31:15,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 12:31:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:15,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:15,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 12:31:15,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 12:31:15,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 12:31:15,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 12:31:15,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 12:31:15,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-09-25 12:31:15,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 12:31:15,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 12:31:15,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 12:31:15,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 12:31:15,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 12:31:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 12:31:15,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:15,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:15,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 12:31:16,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking...