/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/lcp.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 15:55:55,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 15:55:55,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 15:55:55,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 15:55:55,471 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 15:55:55,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 15:55:55,481 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 15:55:55,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 15:55:55,486 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 15:55:55,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 15:55:55,490 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 15:55:55,491 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 15:55:55,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 15:55:55,494 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 15:55:55,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 15:55:55,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 15:55:55,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 15:55:55,501 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 15:55:55,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 15:55:55,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 15:55:55,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 15:55:55,513 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 15:55:55,514 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 15:55:55,515 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 15:55:55,527 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 15:55:55,527 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 15:55:55,527 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 15:55:55,528 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 15:55:55,528 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 15:55:55,530 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 15:55:55,531 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 15:55:55,531 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 15:55:55,532 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 15:55:55,533 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 15:55:55,534 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 15:55:55,534 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 15:55:55,535 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 15:55:55,535 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 15:55:55,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 15:55:55,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 15:55:55,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 15:55:55,538 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 15:55:55,578 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 15:55:55,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 15:55:55,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 15:55:55,581 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 15:55:55,581 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 15:55:55,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 15:55:55,581 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 15:55:55,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 15:55:55,581 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 15:55:55,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 15:55:55,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 15:55:55,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 15:55:55,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 15:55:55,584 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 15:55:55,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 15:55:55,584 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 15:55:55,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 15:55:55,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 15:55:55,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 15:55:55,585 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 15:55:55,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 15:55:55,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 15:55:55,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 15:55:55,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 15:55:55,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 15:55:55,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 15:55:55,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 15:55:55,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 15:55:55,586 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 15:55:55,587 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 15:55:55,886 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 15:55:55,899 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 15:55:55,902 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 15:55:55,904 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 15:55:55,904 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 15:55:55,905 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/lcp.c [2020-10-13 15:55:55,963 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ffa9a8c0/464761c9046d4538a02aea7624411f67/FLAG1d9e7ff50 [2020-10-13 15:55:56,388 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 15:55:56,389 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/verifythis/lcp.c [2020-10-13 15:55:56,396 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ffa9a8c0/464761c9046d4538a02aea7624411f67/FLAG1d9e7ff50 [2020-10-13 15:55:56,799 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3ffa9a8c0/464761c9046d4538a02aea7624411f67 [2020-10-13 15:55:56,807 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 15:55:56,808 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 15:55:56,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 15:55:56,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 15:55:56,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 15:55:56,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 03:55:56" (1/1) ... [2020-10-13 15:55:56,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4288bc19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:55:56, skipping insertion in model container [2020-10-13 15:55:56,818 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 03:55:56" (1/1) ... [2020-10-13 15:55:56,826 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 15:55:56,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 15:55:57,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 15:55:57,105 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 15:55:57,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 15:55:57,243 INFO L208 MainTranslator]: Completed translation [2020-10-13 15:55:57,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:55:57 WrapperNode [2020-10-13 15:55:57,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 15:55:57,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 15:55:57,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 15:55:57,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 15:55:57,258 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:55:57" (1/1) ... [2020-10-13 15:55:57,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:55:57" (1/1) ... [2020-10-13 15:55:57,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:55:57" (1/1) ... [2020-10-13 15:55:57,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:55:57" (1/1) ... [2020-10-13 15:55:57,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:55:57" (1/1) ... [2020-10-13 15:55:57,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:55:57" (1/1) ... [2020-10-13 15:55:57,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:55:57" (1/1) ... [2020-10-13 15:55:57,286 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 15:55:57,287 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 15:55:57,287 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 15:55:57,287 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 15:55:57,288 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:55:57" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 15:55:57,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 15:55:57,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 15:55:57,357 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 15:55:57,357 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 15:55:57,357 INFO L138 BoogieDeclarations]: Found implementation of procedure lcp [2020-10-13 15:55:57,357 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-10-13 15:55:57,358 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 15:55:57,358 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-10-13 15:55:57,358 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-13 15:55:57,358 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-13 15:55:57,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 15:55:57,359 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 15:55:57,359 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 15:55:57,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 15:55:57,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 15:55:57,360 INFO L130 BoogieDeclarations]: Found specification of procedure lcp [2020-10-13 15:55:57,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 15:55:57,360 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 15:55:57,360 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 15:55:57,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 15:55:57,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-10-13 15:55:57,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 15:55:57,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 15:55:57,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 15:55:57,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 15:55:57,694 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 15:55:57,694 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 15:55:57,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 03:55:57 BoogieIcfgContainer [2020-10-13 15:55:57,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 15:55:57,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 15:55:57,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 15:55:57,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 15:55:57,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 03:55:56" (1/3) ... [2020-10-13 15:55:57,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@742833ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 03:55:57, skipping insertion in model container [2020-10-13 15:55:57,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 03:55:57" (2/3) ... [2020-10-13 15:55:57,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@742833ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 03:55:57, skipping insertion in model container [2020-10-13 15:55:57,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 03:55:57" (3/3) ... [2020-10-13 15:55:57,707 INFO L109 eAbstractionObserver]: Analyzing ICFG lcp.c [2020-10-13 15:55:57,721 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 15:55:57,732 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 15:55:57,755 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 15:55:57,781 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 15:55:57,781 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 15:55:57,781 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 15:55:57,782 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 15:55:57,782 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 15:55:57,782 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 15:55:57,782 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 15:55:57,782 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 15:55:57,799 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2020-10-13 15:55:57,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 15:55:57,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:55:57,807 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:55:57,808 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:55:57,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:55:57,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1828758676, now seen corresponding path program 1 times [2020-10-13 15:55:57,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:55:57,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885085336] [2020-10-13 15:55:57,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:55:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:55:57,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:58,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:58,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:58,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:58,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:58,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:55:58,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 15:55:58,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 15:55:58,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 750 [2020-10-13 15:55:58,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:55:58,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:55:58,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 15:55:58,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:55:58,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 15:55:58,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:55:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:55:58,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:58,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:55:58,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:55:58,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:55:58,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:55:58,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:55:58,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:55:58,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:55:58,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:55:58,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:55:58,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:55:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:55:58,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:58,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:55:58,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:55:58,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:55:58,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:55:58,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:55:58,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:55:58,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 15:55:58,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:55:58,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:55:58,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:55:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:55:58,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:58,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:55:58,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:55:58,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:55:58,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:55:58,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:55:58,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:55:58,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 15:55:58,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:55:58,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 15 [2020-10-13 15:55:58,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 15:55:58,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:55:58,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:58,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:58,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:55:58,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:55:58,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:55:58,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:55:58,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:55:58,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:55:58,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 15:55:58,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:55:58,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:55:58,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 15:55:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:55:58,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:58,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:58,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:55:58,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-13 15:55:58,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:55:58,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 15:55:58,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:55:58,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:55:58,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-13 15:55:58,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:55:58,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:55:58,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-13 15:55:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:55:58,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:58,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:58,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:55:58,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:55:58,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:55:58,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:55:58,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:55:58,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:55:58,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 15:55:58,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:55:58,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:55:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 15:55:58,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885085336] [2020-10-13 15:55:58,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:55:58,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 15:55:58,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79513074] [2020-10-13 15:55:58,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 15:55:58,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:55:58,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 15:55:58,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 15:55:58,865 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 4 states. [2020-10-13 15:55:59,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:55:59,019 INFO L93 Difference]: Finished difference Result 91 states and 113 transitions. [2020-10-13 15:55:59,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 15:55:59,021 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-13 15:55:59,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:55:59,030 INFO L225 Difference]: With dead ends: 91 [2020-10-13 15:55:59,031 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 15:55:59,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 15:55:59,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 15:55:59,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-13 15:55:59,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 15:55:59,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-13 15:55:59,083 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 41 [2020-10-13 15:55:59,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:55:59,084 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-13 15:55:59,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 15:55:59,084 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-13 15:55:59,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 15:55:59,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:55:59,087 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:55:59,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 15:55:59,088 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:55:59,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:55:59,088 INFO L82 PathProgramCache]: Analyzing trace with hash 521307715, now seen corresponding path program 1 times [2020-10-13 15:55:59,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:55:59,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209813245] [2020-10-13 15:55:59,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:55:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:55:59,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:55:59,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:00,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:02,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:02,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 15:56:02,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 15:56:02,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3393 [2020-10-13 15:56:02,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:02,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 15:56:02,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 15:56:02,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 15:56:02,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:02,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:56:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:02,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:02,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:02,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:02,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:02,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:02,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:02,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:02,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:02,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:02,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:02,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:56:02,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:02,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:02,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:02,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:02,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:02,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:02,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:02,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:02,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:02,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:02,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:02,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:56:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:02,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:02,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:02,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:02,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:02,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:02,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:02,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:02,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:02,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:02,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:02,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 15:56:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:02,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:02,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:02,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:02,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:02,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:02,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:02,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:02,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:02,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:02,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:02,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 15:56:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:02,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:02,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:02,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-13 15:56:02,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:02,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 15:56:02,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:02,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 15:56:02,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:02,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 15:56:02,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:02,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-13 15:56:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:02,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:02,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:02,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:02,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:02,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 15:56:02,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:02,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 15:56:02,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 15:56:02,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:56:02,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:02,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 15:56:02,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209813245] [2020-10-13 15:56:02,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 15:56:02,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-13 15:56:02,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764192976] [2020-10-13 15:56:02,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 15:56:02,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:56:02,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 15:56:02,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-13 15:56:02,741 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2020-10-13 15:56:03,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:56:03,189 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2020-10-13 15:56:03,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 15:56:03,189 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-13 15:56:03,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:56:03,191 INFO L225 Difference]: With dead ends: 62 [2020-10-13 15:56:03,191 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 15:56:03,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-13 15:56:03,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 15:56:03,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-13 15:56:03,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 15:56:03,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-13 15:56:03,203 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 43 [2020-10-13 15:56:03,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:56:03,211 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-13 15:56:03,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 15:56:03,212 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-13 15:56:03,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 15:56:03,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:03,213 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-10-13 15:56:03,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 15:56:03,214 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:03,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:03,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1586985479, now seen corresponding path program 1 times [2020-10-13 15:56:03,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:03,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245731699] [2020-10-13 15:56:03,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:03,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:03,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:04,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:05,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:05,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 15:56:05,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 15:56:05,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2274 [2020-10-13 15:56:05,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:05,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 15:56:05,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 15:56:05,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 15:56:05,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:05,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:56:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:05,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:05,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:05,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:05,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:05,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:05,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:05,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:05,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:05,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:05,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:05,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:56:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:05,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:05,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:05,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:05,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:05,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:05,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:05,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:05,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:05,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:05,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:05,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:56:05,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:05,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:05,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:05,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:05,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:05,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 15:56:05,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:05,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 15:56:05,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:05,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:56:05,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:05,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 15:56:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:05,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:05,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:05,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:05,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:05,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:56:05,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:05,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:56:05,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:05,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:56:05,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:05,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 15:56:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:05,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:05,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:05,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-13 15:56:05,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:05,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-13 15:56:05,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:05,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:56:05,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 15:56:05,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 15:56:05,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:05,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 15:56:05,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:05,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:05,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:05,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:05,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:05,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:05,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:05,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:05,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 15:56:05,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:05,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:05,746 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-13 15:56:05,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245731699] [2020-10-13 15:56:05,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:56:05,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 15:56:05,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392792840] [2020-10-13 15:56:05,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 15:56:05,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:56:05,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 15:56:05,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-13 15:56:05,749 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 10 states. [2020-10-13 15:56:06,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:56:06,089 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2020-10-13 15:56:06,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 15:56:06,089 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-10-13 15:56:06,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:56:06,092 INFO L225 Difference]: With dead ends: 68 [2020-10-13 15:56:06,092 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 15:56:06,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-13 15:56:06,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 15:56:06,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-10-13 15:56:06,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 15:56:06,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-13 15:56:06,102 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 46 [2020-10-13 15:56:06,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:56:06,103 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-13 15:56:06,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 15:56:06,103 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-13 15:56:06,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 15:56:06,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:06,105 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:56:06,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 15:56:06,105 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:06,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:06,106 INFO L82 PathProgramCache]: Analyzing trace with hash -407159227, now seen corresponding path program 1 times [2020-10-13 15:56:06,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:06,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311220276] [2020-10-13 15:56:06,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:06,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:06,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:06,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:07,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:07,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 15:56:07,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:56:07,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1099 [2020-10-13 15:56:07,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:07,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 15:56:07,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 15:56:07,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 15:56:07,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:07,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:56:07,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:07,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:07,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:07,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:07,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:07,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:07,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:07,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:07,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:07,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:07,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:07,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:56:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:07,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:07,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:07,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:07,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:07,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:07,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:07,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:07,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:07,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:07,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:07,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:56:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:07,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:07,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:07,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:07,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:07,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:07,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:07,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:07,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:07,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:07,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:07,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 15:56:07,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:07,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:07,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:07,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:07,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:07,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:07,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:07,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:07,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:07,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:07,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:07,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 15:56:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:07,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:07,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:07,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-13 15:56:07,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:07,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-13 15:56:07,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:07,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 15:56:07,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:07,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 15:56:07,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:07,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 15:56:07,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:07,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:07,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:07,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:07,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:07,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 15:56:07,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:07,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:56:07,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:07,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 15:56:07,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:07,908 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 15:56:07,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311220276] [2020-10-13 15:56:07,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:56:07,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 15:56:07,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915069002] [2020-10-13 15:56:07,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 15:56:07,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:56:07,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 15:56:07,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-13 15:56:07,911 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 18 states. [2020-10-13 15:56:09,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:56:09,450 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-10-13 15:56:09,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 15:56:09,451 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-10-13 15:56:09,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:56:09,453 INFO L225 Difference]: With dead ends: 67 [2020-10-13 15:56:09,453 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 15:56:09,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2020-10-13 15:56:09,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 15:56:09,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2020-10-13 15:56:09,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 15:56:09,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2020-10-13 15:56:09,466 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 46 [2020-10-13 15:56:09,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:56:09,466 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2020-10-13 15:56:09,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 15:56:09,466 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2020-10-13 15:56:09,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 15:56:09,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:09,468 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-10-13 15:56:09,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 15:56:09,468 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:09,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:09,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1199143935, now seen corresponding path program 2 times [2020-10-13 15:56:09,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:09,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514065779] [2020-10-13 15:56:09,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:09,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:09,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:10,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:10,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 15:56:10,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:56:10,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1000 [2020-10-13 15:56:10,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:10,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 15:56:10,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 15:56:10,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 15:56:10,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:10,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:56:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:10,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:10,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:10,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:10,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:10,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:10,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:10,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:10,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:10,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:10,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:10,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:56:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:10,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:10,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:10,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:10,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:10,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:10,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:10,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:10,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:10,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:10,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:11,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:56:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:11,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:11,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:11,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:11,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:11,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:11,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:11,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:11,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:11,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:11,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:11,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 15:56:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:11,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:11,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:11,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:11,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:11,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:11,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:11,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:11,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:11,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:11,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:11,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 15:56:11,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:11,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:11,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:11,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 15:56:11,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:11,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-13 15:56:11,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:11,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 15:56:11,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:11,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 15:56:11,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:11,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 15:56:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:11,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:11,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:11,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:11,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:11,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 15:56:11,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:11,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:56:11,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:11,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 15:56:11,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 15:56:11,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514065779] [2020-10-13 15:56:11,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:56:11,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 15:56:11,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109670741] [2020-10-13 15:56:11,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 15:56:11,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:56:11,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 15:56:11,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-13 15:56:11,594 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 20 states. [2020-10-13 15:56:14,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:56:14,224 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2020-10-13 15:56:14,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 15:56:14,225 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 49 [2020-10-13 15:56:14,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:56:14,228 INFO L225 Difference]: With dead ends: 91 [2020-10-13 15:56:14,228 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 15:56:14,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 15:56:14,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 15:56:14,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-10-13 15:56:14,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 15:56:14,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2020-10-13 15:56:14,241 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 49 [2020-10-13 15:56:14,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:56:14,241 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2020-10-13 15:56:14,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 15:56:14,242 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2020-10-13 15:56:14,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 15:56:14,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:14,243 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:56:14,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 15:56:14,243 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:14,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:14,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1334744261, now seen corresponding path program 3 times [2020-10-13 15:56:14,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:14,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863289136] [2020-10-13 15:56:14,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:14,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:14,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:15,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:15,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 15:56:15,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:56:15,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1379 [2020-10-13 15:56:15,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:15,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 15:56:15,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 15:56:15,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 15:56:15,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 15:56:15,890 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 63 [2020-10-13 15:56:16,044 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 54 [2020-10-13 15:56:16,202 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 54 [2020-10-13 15:56:16,385 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 55 [2020-10-13 15:56:16,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:56:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:16,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:16,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:16,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:16,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:16,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:16,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:16,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:16,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:16,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:16,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:16,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:56:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:16,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:16,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:16,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:16,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:16,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:16,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:16,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:16,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:16,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:16,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:16,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:56:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:16,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:16,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:16,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:16,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:16,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:16,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:16,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:16,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:16,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:16,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:16,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 15:56:16,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:16,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:16,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:16,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:16,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:16,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:16,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:16,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:16,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:16,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:16,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:16,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 15:56:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:16,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:16,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:16,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-13 15:56:16,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:16,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-13 15:56:16,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:16,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 15:56:16,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:16,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 15:56:16,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:17,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 15:56:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:17,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:17,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:17,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:17,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:17,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 15:56:17,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:17,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:56:17,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:17,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 15:56:17,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 15:56:17,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863289136] [2020-10-13 15:56:17,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:56:17,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 15:56:17,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765538575] [2020-10-13 15:56:17,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 15:56:17,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:56:17,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 15:56:17,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-10-13 15:56:17,327 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 22 states. [2020-10-13 15:56:19,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:56:19,936 INFO L93 Difference]: Finished difference Result 125 states and 149 transitions. [2020-10-13 15:56:19,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 15:56:19,937 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-13 15:56:19,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:56:19,940 INFO L225 Difference]: With dead ends: 125 [2020-10-13 15:56:19,940 INFO L226 Difference]: Without dead ends: 123 [2020-10-13 15:56:19,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=185, Invalid=1375, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 15:56:19,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-13 15:56:19,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 71. [2020-10-13 15:56:19,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 15:56:19,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2020-10-13 15:56:19,956 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 52 [2020-10-13 15:56:19,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:56:19,956 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2020-10-13 15:56:19,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 15:56:19,957 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2020-10-13 15:56:19,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 15:56:19,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:19,958 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:56:19,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 15:56:19,958 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:19,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:19,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1707917959, now seen corresponding path program 1 times [2020-10-13 15:56:19,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:19,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827953177] [2020-10-13 15:56:19,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:19,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:20,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:20,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:20,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:22,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:22,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 15:56:22,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 15:56:22,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2511 [2020-10-13 15:56:22,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:22,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 15:56:22,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 15:56:22,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 15:56:22,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:22,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:56:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:22,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:22,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:22,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:22,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:22,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 15:56:22,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:22,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:22,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:22,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:22,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:22,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:56:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:22,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:22,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:22,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:22,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:22,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 15:56:22,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:22,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:22,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:22,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:22,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:22,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:56:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:22,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:22,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:22,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:22,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:22,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:22,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:22,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:22,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:22,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:22,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:22,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 15:56:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:22,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:22,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:22,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:22,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:22,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:22,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:22,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:22,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:22,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:22,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:22,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 15:56:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:22,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:22,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:22,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:22,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-13 15:56:22,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:56:22,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-13 15:56:22,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:22,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 15:56:22,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:22,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 15:56:22,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:22,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-13 15:56:22,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:22,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:22,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:22,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:22,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:22,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 15:56:22,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:22,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:56:22,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:22,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 15:56:22,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:22,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-13 15:56:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:22,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:22,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:22,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:22,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:22,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:56:22,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:22,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:56:22,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:22,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:56:22,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:22,772 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 15:56:22,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827953177] [2020-10-13 15:56:22,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:56:22,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 15:56:22,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018553523] [2020-10-13 15:56:22,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 15:56:22,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:56:22,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 15:56:22,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-13 15:56:22,775 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand 14 states. [2020-10-13 15:56:23,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:56:23,500 INFO L93 Difference]: Finished difference Result 117 states and 141 transitions. [2020-10-13 15:56:23,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 15:56:23,500 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-13 15:56:23,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:56:23,502 INFO L225 Difference]: With dead ends: 117 [2020-10-13 15:56:23,502 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 15:56:23,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2020-10-13 15:56:23,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 15:56:23,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2020-10-13 15:56:23,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-13 15:56:23,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2020-10-13 15:56:23,519 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 53 [2020-10-13 15:56:23,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:56:23,520 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2020-10-13 15:56:23,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 15:56:23,520 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2020-10-13 15:56:23,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-13 15:56:23,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:23,522 INFO L422 BasicCegarLoop]: trace histogram [5, 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, 1, 1] [2020-10-13 15:56:23,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 15:56:23,522 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:23,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:23,523 INFO L82 PathProgramCache]: Analyzing trace with hash 52796801, now seen corresponding path program 4 times [2020-10-13 15:56:23,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:23,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816702117] [2020-10-13 15:56:23,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:23,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:23,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:23,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:24,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:24,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 15:56:24,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:56:24,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1123 [2020-10-13 15:56:24,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:24,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 15:56:24,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 15:56:24,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 15:56:24,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:25,113 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 70 [2020-10-13 15:56:25,389 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 62 [2020-10-13 15:56:27,835 WARN L193 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 127 DAG size of output: 70 [2020-10-13 15:56:28,190 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 69 [2020-10-13 15:56:28,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:56:28,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:28,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:28,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:28,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:28,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:28,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:28,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:28,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:28,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:28,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:28,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:28,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:56:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:28,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:28,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:28,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:28,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:28,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:28,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:28,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:28,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:28,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:28,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:28,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:56:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:28,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:28,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:28,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:28,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:28,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:28,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:28,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:28,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:28,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:28,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:28,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 15:56:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:28,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:28,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:28,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:28,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:28,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:28,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:28,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:28,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:28,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:28,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:28,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 15:56:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:28,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:28,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:28,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 15:56:28,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:28,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-13 15:56:28,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:28,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 15:56:28,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:28,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 15:56:28,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:29,647 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-13 15:56:30,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 15:56:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:30,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:30,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:30,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:30,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:30,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-13 15:56:30,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:30,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:56:30,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:30,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 15:56:30,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 15:56:30,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816702117] [2020-10-13 15:56:30,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:56:30,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 15:56:30,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210359629] [2020-10-13 15:56:30,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 15:56:30,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:56:30,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 15:56:30,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-10-13 15:56:30,332 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand 24 states. [2020-10-13 15:56:32,402 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2020-10-13 15:56:32,630 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 74 [2020-10-13 15:56:32,989 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 63 [2020-10-13 15:56:33,225 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2020-10-13 15:56:33,691 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 65 [2020-10-13 15:56:33,944 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 63 [2020-10-13 15:56:34,366 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 71 [2020-10-13 15:56:34,855 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 65 [2020-10-13 15:56:35,206 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-13 15:56:35,536 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 71 [2020-10-13 15:56:35,929 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-13 15:56:36,283 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-13 15:56:36,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:56:36,787 INFO L93 Difference]: Finished difference Result 270 states and 325 transitions. [2020-10-13 15:56:36,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 15:56:36,788 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 55 [2020-10-13 15:56:36,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:56:36,790 INFO L225 Difference]: With dead ends: 270 [2020-10-13 15:56:36,790 INFO L226 Difference]: Without dead ends: 187 [2020-10-13 15:56:36,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=369, Invalid=2711, Unknown=0, NotChecked=0, Total=3080 [2020-10-13 15:56:36,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-13 15:56:36,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 110. [2020-10-13 15:56:36,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 15:56:36,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 130 transitions. [2020-10-13 15:56:36,829 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 130 transitions. Word has length 55 [2020-10-13 15:56:36,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:56:36,829 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 130 transitions. [2020-10-13 15:56:36,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 15:56:36,830 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 130 transitions. [2020-10-13 15:56:36,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 15:56:36,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:36,831 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:56:36,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 15:56:36,832 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:36,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:36,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1501383741, now seen corresponding path program 2 times [2020-10-13 15:56:36,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:36,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768230663] [2020-10-13 15:56:36,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:36,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:36,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:37,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:37,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 15:56:37,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:56:37,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 463 [2020-10-13 15:56:37,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:37,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 15:56:37,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 15:56:37,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 15:56:37,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:37,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:56:37,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:37,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:37,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:37,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:37,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:37,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:37,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:37,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:37,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:37,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:37,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:37,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:56:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:37,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:37,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:37,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:37,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:37,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 15:56:37,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:37,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:37,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:37,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:37,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:37,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:56:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:37,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:37,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:37,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:37,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:37,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:37,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:37,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:37,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:37,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:37,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:37,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 15:56:37,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:37,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:37,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:37,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:37,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:37,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:37,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:37,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:37,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:37,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:37,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:37,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 15:56:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:37,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:37,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:37,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:37,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 15:56:37,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:56:37,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-13 15:56:37,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:37,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 15:56:37,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:37,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 15:56:37,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:37,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-13 15:56:37,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:37,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:37,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:37,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:37,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:37,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:37,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:37,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:56:37,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:37,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:56:37,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:37,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-13 15:56:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:37,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:37,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:37,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:37,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:37,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 15:56:37,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:37,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 15:56:37,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:37,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 15:56:37,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-13 15:56:37,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768230663] [2020-10-13 15:56:37,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:56:37,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 15:56:37,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231134110] [2020-10-13 15:56:37,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 15:56:37,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:56:37,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 15:56:37,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-13 15:56:37,627 INFO L87 Difference]: Start difference. First operand 110 states and 130 transitions. Second operand 12 states. [2020-10-13 15:56:38,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:56:38,099 INFO L93 Difference]: Finished difference Result 128 states and 151 transitions. [2020-10-13 15:56:38,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 15:56:38,099 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 56 [2020-10-13 15:56:38,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:56:38,101 INFO L225 Difference]: With dead ends: 128 [2020-10-13 15:56:38,101 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 15:56:38,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-10-13 15:56:38,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 15:56:38,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 57. [2020-10-13 15:56:38,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 15:56:38,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2020-10-13 15:56:38,111 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 56 [2020-10-13 15:56:38,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:56:38,111 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2020-10-13 15:56:38,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 15:56:38,112 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2020-10-13 15:56:38,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 15:56:38,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:38,113 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:56:38,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 15:56:38,113 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:38,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:38,114 INFO L82 PathProgramCache]: Analyzing trace with hash 405211973, now seen corresponding path program 5 times [2020-10-13 15:56:38,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:38,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314154344] [2020-10-13 15:56:38,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:38,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:38,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:38,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:39,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:39,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 15:56:39,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:56:39,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1175 [2020-10-13 15:56:39,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:39,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 15:56:39,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 15:56:39,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 15:56:39,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:40,500 WARN L193 SmtUtils]: Spent 963.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 92 [2020-10-13 15:56:41,615 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 244 DAG size of output: 92 [2020-10-13 15:56:42,954 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 244 DAG size of output: 100 [2020-10-13 15:56:44,969 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 244 DAG size of output: 108 [2020-10-13 15:56:45,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:56:45,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:45,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:45,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:45,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:45,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:45,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:45,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:45,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:45,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:45,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:45,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:45,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:56:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:45,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:45,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:45,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:45,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:45,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:45,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:45,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:45,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:45,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:45,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:45,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:56:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:45,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:45,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:45,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:56:45,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:45,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:45,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:45,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:45,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:45,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:45,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:45,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 15:56:45,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:45,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:45,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:45,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:45,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:45,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:56:45,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:45,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:56:45,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:45,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:56:45,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:45,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 15:56:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:45,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:45,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:45,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 15:56:45,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:45,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-13 15:56:45,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:45,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 15:56:45,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:45,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 15:56:45,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:46,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-13 15:56:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:46,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:46,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:46,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:56:46,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:56:46,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 15:56:46,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:46,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:56:46,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:56:46,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 15:56:46,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:56:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 15:56:47,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314154344] [2020-10-13 15:56:47,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:56:47,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 15:56:47,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340358077] [2020-10-13 15:56:47,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 15:56:47,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:56:47,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 15:56:47,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2020-10-13 15:56:47,212 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 26 states. [2020-10-13 15:56:48,578 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-13 15:56:48,959 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 54 [2020-10-13 15:56:49,608 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 55 [2020-10-13 15:56:50,090 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 64 [2020-10-13 15:56:50,408 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 72 [2020-10-13 15:56:50,636 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2020-10-13 15:56:50,855 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 71 [2020-10-13 15:56:51,112 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 74 [2020-10-13 15:56:52,103 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-13 15:56:53,392 WARN L193 SmtUtils]: Spent 997.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-13 15:56:54,819 WARN L193 SmtUtils]: Spent 875.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-13 15:56:56,372 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 215 [2020-10-13 15:56:56,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:56:56,969 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2020-10-13 15:56:56,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 15:56:56,970 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 58 [2020-10-13 15:56:56,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:56:56,971 INFO L225 Difference]: With dead ends: 102 [2020-10-13 15:56:56,971 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 15:56:56,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=276, Invalid=2274, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 15:56:56,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 15:56:56,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 73. [2020-10-13 15:56:56,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 15:56:56,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-10-13 15:56:56,985 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 58 [2020-10-13 15:56:56,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:56:56,986 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-10-13 15:56:56,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 15:56:56,986 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-10-13 15:56:56,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 15:56:56,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:56:56,987 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:56:56,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 15:56:56,988 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:56:56,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:56:56,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1989437695, now seen corresponding path program 6 times [2020-10-13 15:56:56,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:56:56,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776483522] [2020-10-13 15:56:56,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:56:57,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:56:57,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:57,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:56:58,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:56:58,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 15:56:58,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:56:58,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1160 [2020-10-13 15:56:58,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:56:58,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 15:56:58,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 15:56:58,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 15:56:58,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:57:24,559 WARN L193 SmtUtils]: Spent 24.90 s on a formula simplification. DAG size of input: 641 DAG size of output: 112 [2020-10-13 15:57:50,572 WARN L193 SmtUtils]: Spent 25.60 s on a formula simplification. DAG size of input: 641 DAG size of output: 112 [2020-10-13 15:58:14,380 WARN L193 SmtUtils]: Spent 22.95 s on a formula simplification. DAG size of input: 638 DAG size of output: 113 [2020-10-13 15:58:45,113 WARN L193 SmtUtils]: Spent 28.57 s on a formula simplification. DAG size of input: 641 DAG size of output: 114 [2020-10-13 15:58:45,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:58:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:58:45,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:58:45,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:58:45,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:58:45,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:58:45,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:58:45,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:58:45,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:58:45,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:58:45,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:58:45,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:58:45,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:58:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:58:45,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:58:45,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:58:45,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:58:45,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:58:45,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 15:58:45,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:58:45,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:58:45,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:58:45,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:58:45,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:58:45,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:58:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:58:45,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:58:45,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:58:45,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:58:45,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:58:45,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:58:45,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:58:45,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:58:45,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:58:45,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:58:45,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:58:45,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 15:58:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:58:45,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:58:45,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:58:45,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:58:45,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:58:45,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 15:58:45,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:58:45,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:58:45,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:58:45,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:58:45,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:58:45,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 15:58:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:58:45,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:58:46,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:58:46,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 15:58:46,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:58:46,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 406 [2020-10-13 15:58:46,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:58:46,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 15:58:46,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:58:46,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 15:58:46,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:58:47,480 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-13 15:58:47,924 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-10-13 15:58:48,176 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-13 15:58:48,493 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-10-13 15:58:48,752 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-10-13 15:58:49,059 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-10-13 15:58:49,367 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-13 15:58:49,644 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-13 15:58:49,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-13 15:58:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:58:49,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:58:49,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:58:49,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:58:49,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:58:49,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-13 15:58:49,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:58:49,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:58:49,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:58:49,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 15:58:49,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:58:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 15:58:50,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776483522] [2020-10-13 15:58:50,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:58:50,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 15:58:50,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731244455] [2020-10-13 15:58:50,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 15:58:50,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:58:50,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 15:58:50,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=698, Unknown=0, NotChecked=0, Total=756 [2020-10-13 15:58:50,165 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 28 states. [2020-10-13 15:58:59,102 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 82 [2020-10-13 15:59:00,090 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2020-10-13 15:59:03,332 WARN L193 SmtUtils]: Spent 2.44 s on a formula simplification that was a NOOP. DAG size: 119 [2020-10-13 15:59:07,723 WARN L193 SmtUtils]: Spent 3.76 s on a formula simplification that was a NOOP. DAG size: 218 [2020-10-13 15:59:15,251 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification that was a NOOP. DAG size: 225 [2020-10-13 15:59:17,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 15:59:17,842 INFO L93 Difference]: Finished difference Result 113 states and 128 transitions. [2020-10-13 15:59:17,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 15:59:17,844 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 61 [2020-10-13 15:59:17,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 15:59:17,845 INFO L225 Difference]: With dead ends: 113 [2020-10-13 15:59:17,845 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 15:59:17,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 128.4s TimeCoverageRelationStatistics Valid=212, Invalid=2235, Unknown=3, NotChecked=0, Total=2450 [2020-10-13 15:59:17,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 15:59:17,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2020-10-13 15:59:17,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 15:59:17,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-10-13 15:59:17,858 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 61 [2020-10-13 15:59:17,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 15:59:17,858 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-10-13 15:59:17,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 15:59:17,859 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-10-13 15:59:17,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 15:59:17,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 15:59:17,860 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 15:59:17,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 15:59:17,860 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 15:59:17,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 15:59:17,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1590910523, now seen corresponding path program 7 times [2020-10-13 15:59:17,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 15:59:17,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134932848] [2020-10-13 15:59:17,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 15:59:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:59:17,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:59:18,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:59:19,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:59:19,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 15:59:19,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 15:59:19,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1522 [2020-10-13 15:59:19,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:59:19,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 15:59:19,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 15:59:19,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 15:59:19,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:59:29,569 WARN L193 SmtUtils]: Spent 6.55 s on a formula simplification. DAG size of input: 1392 DAG size of output: 242 [2020-10-13 15:59:38,231 WARN L193 SmtUtils]: Spent 8.52 s on a formula simplification. DAG size of input: 1392 DAG size of output: 231 [2020-10-13 15:59:40,354 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 1392 DAG size of output: 175 [2020-10-13 15:59:53,230 WARN L193 SmtUtils]: Spent 12.69 s on a formula simplification. DAG size of input: 1392 DAG size of output: 218 [2020-10-13 15:59:53,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 15:59:53,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:59:53,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:59:53,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:59:53,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:59:53,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:59:53,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:59:53,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:59:53,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:59:53,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:59:53,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:59:53,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:59:53,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 15:59:53,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:59:53,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:59:53,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:59:53,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:59:53,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:59:53,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:59:53,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:59:53,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:59:53,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:59:53,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:59:53,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:59:53,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-13 15:59:53,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:59:53,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:59:53,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:59:53,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 15:59:53,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:59:53,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 15:59:53,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:59:53,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:59:53,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:59:53,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:59:53,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:59:53,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 15:59:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:59:53,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:59:53,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:59:53,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:59:53,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:59:53,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 15:59:53,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:59:53,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 15:59:53,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:59:53,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 15:59:53,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:59:53,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-13 15:59:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:59:53,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:59:54,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:59:54,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 15:59:54,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:59:54,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 469 [2020-10-13 15:59:54,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:59:54,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 15:59:54,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:59:54,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 15:59:54,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:59:54,695 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-10-13 15:59:55,029 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-10-13 15:59:55,415 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-10-13 15:59:55,868 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-13 15:59:57,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-13 15:59:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 15:59:57,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 15:59:57,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 15:59:57,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 15:59:57,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 15:59:57,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-13 15:59:57,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 15:59:57,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 15:59:57,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 15:59:57,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 15:59:57,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 15:59:57,553 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 15:59:57,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134932848] [2020-10-13 15:59:57,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 15:59:57,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 15:59:57,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945025498] [2020-10-13 15:59:57,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 15:59:57,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 15:59:57,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 15:59:57,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=808, Unknown=0, NotChecked=0, Total=870 [2020-10-13 15:59:57,555 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 30 states. [2020-10-13 15:59:59,628 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-13 16:00:00,285 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2020-10-13 16:00:01,231 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 80 [2020-10-13 16:00:01,921 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 78 [2020-10-13 16:00:02,807 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 86 [2020-10-13 16:00:03,531 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 78 [2020-10-13 16:00:04,305 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-13 16:00:04,819 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 86 [2020-10-13 16:00:05,471 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2020-10-13 16:00:05,867 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 77 [2020-10-13 16:00:06,713 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 71 [2020-10-13 16:00:07,246 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 79 [2020-10-13 16:00:07,792 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 85 [2020-10-13 16:00:08,416 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-13 16:00:08,934 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 78