/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/array-fpi/sina2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:11:23,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:11:23,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:11:23,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:11:23,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:11:23,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:11:23,542 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:11:23,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:11:23,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:11:23,551 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:11:23,552 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:11:23,553 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:11:23,553 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:11:23,556 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:11:23,558 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:11:23,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:11:23,561 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:11:23,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:11:23,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:11:23,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:11:23,574 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:11:23,575 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:11:23,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:11:23,578 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:11:23,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:11:23,583 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:11:23,583 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:11:23,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:11:23,585 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:11:23,589 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:11:23,589 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:11:23,590 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:11:23,591 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:11:23,595 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:11:23,595 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:11:23,596 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:11:23,597 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:11:23,598 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:11:23,598 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:11:23,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:11:23,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:11:23,601 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 05:11:23,636 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:11:23,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:11:23,639 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:11:23,639 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:11:23,639 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:11:23,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:11:23,640 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:11:23,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:11:23,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:11:23,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:11:23,641 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:11:23,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:11:23,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:11:23,642 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:11:23,642 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:11:23,643 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:11:23,643 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:11:23,643 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:11:23,643 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:11:23,643 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:11:23,644 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:11:23,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:11:23,644 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:11:23,644 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:11:23,644 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:11:23,645 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:11:23,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:11:23,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:11:23,645 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:11:23,645 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 05:11:23,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:11:23,953 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:11:23,957 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:11:23,958 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:11:23,959 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:11:23,960 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/sina2.c [2020-10-13 05:11:24,016 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ceca1438/b0085d6cff2545f988e9374abcb51ea0/FLAG4dea2f5e4 [2020-10-13 05:11:24,464 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:11:24,465 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/sina2.c [2020-10-13 05:11:24,472 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ceca1438/b0085d6cff2545f988e9374abcb51ea0/FLAG4dea2f5e4 [2020-10-13 05:11:24,860 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ceca1438/b0085d6cff2545f988e9374abcb51ea0 [2020-10-13 05:11:24,868 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:11:24,870 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:11:24,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:11:24,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:11:24,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:11:24,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:11:24" (1/1) ... [2020-10-13 05:11:24,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b337bef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:24, skipping insertion in model container [2020-10-13 05:11:24,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:11:24" (1/1) ... [2020-10-13 05:11:24,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:11:24,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:11:25,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:11:25,092 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:11:25,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:11:25,216 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:11:25,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:25 WrapperNode [2020-10-13 05:11:25,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:11:25,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:11:25,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:11:25,218 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:11:25,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:25" (1/1) ... [2020-10-13 05:11:25,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:25" (1/1) ... [2020-10-13 05:11:25,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:25" (1/1) ... [2020-10-13 05:11:25,237 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:25" (1/1) ... [2020-10-13 05:11:25,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:25" (1/1) ... [2020-10-13 05:11:25,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:25" (1/1) ... [2020-10-13 05:11:25,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:25" (1/1) ... [2020-10-13 05:11:25,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:11:25,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:11:25,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:11:25,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:11:25,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:25" (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 05:11:25,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:11:25,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:11:25,314 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 05:11:25,314 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:11:25,314 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:11:25,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:11:25,315 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 05:11:25,316 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 05:11:25,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:11:25,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:11:25,316 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 05:11:25,316 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:11:25,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:11:25,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 05:11:25,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:11:25,317 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:11:25,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:11:25,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:11:25,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:11:25,576 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:11:25,576 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 05:11:25,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:11:25 BoogieIcfgContainer [2020-10-13 05:11:25,581 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:11:25,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:11:25,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:11:25,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:11:25,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:11:24" (1/3) ... [2020-10-13 05:11:25,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5023c92e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:11:25, skipping insertion in model container [2020-10-13 05:11:25,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:11:25" (2/3) ... [2020-10-13 05:11:25,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5023c92e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:11:25, skipping insertion in model container [2020-10-13 05:11:25,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:11:25" (3/3) ... [2020-10-13 05:11:25,590 INFO L109 eAbstractionObserver]: Analyzing ICFG sina2.c [2020-10-13 05:11:25,606 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:11:25,614 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:11:25,634 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:11:25,665 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:11:25,666 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:11:25,666 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:11:25,666 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:11:25,666 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:11:25,666 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:11:25,667 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:11:25,667 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:11:25,687 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-13 05:11:25,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 05:11:25,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:25,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:11:25,696 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:25,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:25,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1155719453, now seen corresponding path program 1 times [2020-10-13 05:11:25,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:25,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396499152] [2020-10-13 05:11:25,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:25,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:25,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:26,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:26,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:26,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:26,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:26,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:26,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:26,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 05:11:26,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:11:26,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1096 [2020-10-13 05:11:26,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:26,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:26,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 05:11:26,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:26,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 05:11:26,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:26,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:27,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:27,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:27,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:27,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:11:27,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:27,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:27,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:27,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:27,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:27,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:27,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:27,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:27,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:27,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:27,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:11:27,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:27,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:27,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 05:11:27,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:27,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:27,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:11:27,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396499152] [2020-10-13 05:11:27,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:11:27,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:11:27,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967274364] [2020-10-13 05:11:27,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:11:27,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:27,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:11:27,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:11:27,052 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-13 05:11:27,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:27,158 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2020-10-13 05:11:27,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:11:27,160 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-13 05:11:27,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:27,169 INFO L225 Difference]: With dead ends: 64 [2020-10-13 05:11:27,169 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 05:11:27,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:11:27,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 05:11:27,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-13 05:11:27,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 05:11:27,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-13 05:11:27,217 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2020-10-13 05:11:27,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:27,218 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-13 05:11:27,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:11:27,218 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-13 05:11:27,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 05:11:27,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:27,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:11:27,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:11:27,220 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:27,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:27,221 INFO L82 PathProgramCache]: Analyzing trace with hash -124144225, now seen corresponding path program 1 times [2020-10-13 05:11:27,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:27,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094786935] [2020-10-13 05:11:27,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:27,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:27,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:27,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:27,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:27,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:27,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:27,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:27,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:27,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 05:11:27,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:11:27,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 584 [2020-10-13 05:11:27,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:27,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:11:27,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 05:11:27,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 05:11:27,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-13 05:11:27,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:27,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:27,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:27,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:27,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:27,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:11:27,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:27,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:27,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:27,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:27,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:27,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:27,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:27,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:27,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:27,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:27,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:27,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:11:27,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:27,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:27,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:27,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:27,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:27,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:11:27,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094786935] [2020-10-13 05:11:27,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:11:27,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 05:11:27,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143729145] [2020-10-13 05:11:27,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:11:27,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:27,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:11:27,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:11:27,924 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 6 states. [2020-10-13 05:11:28,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:28,193 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2020-10-13 05:11:28,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:11:28,194 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-13 05:11:28,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:28,198 INFO L225 Difference]: With dead ends: 64 [2020-10-13 05:11:28,198 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 05:11:28,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:11:28,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 05:11:28,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-10-13 05:11:28,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 05:11:28,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-13 05:11:28,226 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 24 [2020-10-13 05:11:28,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:28,227 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-13 05:11:28,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:11:28,227 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-13 05:11:28,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 05:11:28,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:28,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:11:28,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:11:28,231 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:28,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:28,232 INFO L82 PathProgramCache]: Analyzing trace with hash -191015719, now seen corresponding path program 1 times [2020-10-13 05:11:28,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:28,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982305539] [2020-10-13 05:11:28,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:28,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:28,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:28,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:28,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:30,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:30,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:30,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:30,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:30,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:30,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 05:11:30,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:11:30,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2357 [2020-10-13 05:11:30,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:30,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:11:30,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:11:30,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 05:11:30,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:31,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:31,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:31,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:31,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:31,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:31,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:31,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:11:31,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:31,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:31,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:31,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:31,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:31,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:31,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:31,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:31,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:31,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:31,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:31,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:31,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:31,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:31,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:31,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:31,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:11:31,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982305539] [2020-10-13 05:11:31,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:31,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:11:31,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516302483] [2020-10-13 05:11:31,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:11:31,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:31,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:11:31,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:11:31,266 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 16 states. [2020-10-13 05:11:32,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:32,327 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2020-10-13 05:11:32,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 05:11:32,327 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-10-13 05:11:32,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:32,329 INFO L225 Difference]: With dead ends: 60 [2020-10-13 05:11:32,329 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 05:11:32,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:11:32,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 05:11:32,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-10-13 05:11:32,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 05:11:32,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-10-13 05:11:32,341 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 30 [2020-10-13 05:11:32,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:32,342 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-10-13 05:11:32,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:11:32,342 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-10-13 05:11:32,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 05:11:32,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:32,344 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 05:11:32,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:11:32,344 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:32,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:32,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1056875863, now seen corresponding path program 2 times [2020-10-13 05:11:32,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:32,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628584463] [2020-10-13 05:11:32,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:32,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:32,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:32,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:33,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:33,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:33,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:33,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 05:11:33,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:11:33,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1283 [2020-10-13 05:11:33,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:33,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:11:33,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 05:11:33,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 05:11:33,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:33,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:33,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:33,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:33,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:33,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:33,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:11:33,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:33,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:33,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:33,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:33,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:33,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:33,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:33,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:33,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:33,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:33,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:33,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:33,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:33,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:33,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:33,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:33,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:11:33,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628584463] [2020-10-13 05:11:33,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:33,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:11:33,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202388648] [2020-10-13 05:11:33,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:11:33,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:33,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:11:33,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:11:33,719 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 8 states. [2020-10-13 05:11:34,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:34,006 INFO L93 Difference]: Finished difference Result 100 states and 113 transitions. [2020-10-13 05:11:34,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:11:34,007 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-13 05:11:34,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:34,008 INFO L225 Difference]: With dead ends: 100 [2020-10-13 05:11:34,008 INFO L226 Difference]: Without dead ends: 63 [2020-10-13 05:11:34,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:11:34,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-13 05:11:34,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 50. [2020-10-13 05:11:34,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 05:11:34,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2020-10-13 05:11:34,018 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 32 [2020-10-13 05:11:34,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:34,019 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2020-10-13 05:11:34,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:11:34,019 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2020-10-13 05:11:34,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 05:11:34,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:34,021 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 05:11:34,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:11:34,021 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:34,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:34,021 INFO L82 PathProgramCache]: Analyzing trace with hash -826260009, now seen corresponding path program 3 times [2020-10-13 05:11:34,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:34,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206767074] [2020-10-13 05:11:34,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:34,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:34,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:34,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:34,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:34,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:35,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:35,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:35,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 05:11:35,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:11:35,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1177 [2020-10-13 05:11:35,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:35,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:11:35,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:11:35,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:11:35,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:35,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:35,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:35,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:35,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:35,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:35,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:11:35,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:35,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:35,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:35,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:35,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:35,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:35,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:35,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:35,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:35,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:35,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:11:35,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:35,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:35,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:35,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:35,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:11:35,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206767074] [2020-10-13 05:11:35,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:35,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:11:35,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48516156] [2020-10-13 05:11:35,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:11:35,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:35,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:11:35,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:11:35,290 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 8 states. [2020-10-13 05:11:35,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:35,603 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-10-13 05:11:35,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:11:35,604 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-13 05:11:35,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:35,605 INFO L225 Difference]: With dead ends: 57 [2020-10-13 05:11:35,605 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 05:11:35,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:11:35,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 05:11:35,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-10-13 05:11:35,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 05:11:35,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-10-13 05:11:35,612 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 32 [2020-10-13 05:11:35,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:35,613 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-10-13 05:11:35,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:11:35,613 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-10-13 05:11:35,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 05:11:35,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:35,614 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:11:35,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:11:35,615 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:35,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:35,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1433214829, now seen corresponding path program 4 times [2020-10-13 05:11:35,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:35,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085071705] [2020-10-13 05:11:35,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:35,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:35,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:36,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:36,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:37,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:37,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:37,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:38,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:39,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:39,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:39,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:40,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:40,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:40,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:40,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:40,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:40,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 05:11:40,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 05:11:40,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-13 05:11:40,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:40,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:11:40,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:11:40,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 05:11:40,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:41,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:41,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:41,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:41,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:41,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:41,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:41,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:11:41,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:41,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:41,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:41,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:41,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:41,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:41,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:41,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:41,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:41,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:41,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:11:41,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:41,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:41,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:41,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:41,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:41,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:11:41,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085071705] [2020-10-13 05:11:41,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:41,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:11:41,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714941853] [2020-10-13 05:11:41,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:11:41,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:41,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:11:41,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:11:41,924 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 22 states. [2020-10-13 05:11:43,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:43,789 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2020-10-13 05:11:43,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:11:43,792 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 36 [2020-10-13 05:11:43,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:43,793 INFO L225 Difference]: With dead ends: 88 [2020-10-13 05:11:43,793 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 05:11:43,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=168, Invalid=1314, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 05:11:43,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 05:11:43,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2020-10-13 05:11:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 05:11:43,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2020-10-13 05:11:43,803 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 36 [2020-10-13 05:11:43,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:43,804 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2020-10-13 05:11:43,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:11:43,804 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2020-10-13 05:11:43,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 05:11:43,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:43,805 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:11:43,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:11:43,806 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:43,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:43,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1304439441, now seen corresponding path program 5 times [2020-10-13 05:11:43,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:43,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55797053] [2020-10-13 05:11:43,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:43,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:43,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:44,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:44,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:44,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:45,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:45,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:46,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:46,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:46,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:47,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:47,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:47,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:47,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 05:11:47,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 05:11:47,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4010 [2020-10-13 05:11:47,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:47,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:11:47,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 05:11:47,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:11:47,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:47,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:47,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:47,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:47,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:47,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:47,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:11:47,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:47,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:47,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:47,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:47,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:47,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:47,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:47,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:47,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:47,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:47,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:47,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:47,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:47,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:47,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:47,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:47,921 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:11:47,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55797053] [2020-10-13 05:11:47,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:47,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:11:47,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484872452] [2020-10-13 05:11:47,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:11:47,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:47,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:11:47,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:11:47,925 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 10 states. [2020-10-13 05:11:48,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:48,266 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2020-10-13 05:11:48,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:11:48,267 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-13 05:11:48,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:48,270 INFO L225 Difference]: With dead ends: 116 [2020-10-13 05:11:48,270 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 05:11:48,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:11:48,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 05:11:48,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2020-10-13 05:11:48,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 05:11:48,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2020-10-13 05:11:48,285 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 38 [2020-10-13 05:11:48,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:48,285 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2020-10-13 05:11:48,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:11:48,286 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2020-10-13 05:11:48,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 05:11:48,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:48,287 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:11:48,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:11:48,287 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:48,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:48,288 INFO L82 PathProgramCache]: Analyzing trace with hash 925932305, now seen corresponding path program 6 times [2020-10-13 05:11:48,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:48,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959856163] [2020-10-13 05:11:48,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:48,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:48,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:48,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:49,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:49,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:49,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:50,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:50,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:51,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:51,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:51,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:51,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:52,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:52,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:52,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:52,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 05:11:52,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 05:11:52,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3995 [2020-10-13 05:11:52,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:52,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:11:52,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:11:52,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:11:52,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:52,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:52,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:52,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:52,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:52,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:52,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:52,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:52,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:52,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:52,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:52,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:52,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:52,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:52,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:52,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:52,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:52,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:52,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:52,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:52,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:52,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:52,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:11:52,386 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:11:52,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959856163] [2020-10-13 05:11:52,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:52,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:11:52,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207183627] [2020-10-13 05:11:52,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:11:52,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:52,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:11:52,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:11:52,389 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 10 states. [2020-10-13 05:11:52,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:11:52,837 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2020-10-13 05:11:52,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:11:52,838 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-13 05:11:52,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:11:52,840 INFO L225 Difference]: With dead ends: 104 [2020-10-13 05:11:52,840 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 05:11:52,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:11:52,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 05:11:52,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2020-10-13 05:11:52,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 05:11:52,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-10-13 05:11:52,852 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 38 [2020-10-13 05:11:52,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:11:52,853 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-10-13 05:11:52,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:11:52,853 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-10-13 05:11:52,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 05:11:52,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:11:52,854 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:11:52,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:11:52,855 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:11:52,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:11:52,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1081149235, now seen corresponding path program 7 times [2020-10-13 05:11:52,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:11:52,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913193511] [2020-10-13 05:11:52,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:11:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:52,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:53,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:53,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:54,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:54,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:54,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:54,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:55,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:55,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:55,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:56,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:56,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:56,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:57,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:57,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:57,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:57,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:57,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 05:11:57,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 05:11:57,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:11:57,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:57,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 05:11:57,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:11:57,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 05:11:57,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:59,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:11:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:59,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:59,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:59,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:11:59,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:59,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:11:59,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:59,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:59,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:59,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:59,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:59,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:11:59,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:11:59,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:11:59,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:11:59,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:11:59,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:11:59,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:11:59,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:11:59,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:11:59,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:11:59,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:11:59,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:11:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:11:59,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913193511] [2020-10-13 05:11:59,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:11:59,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 05:11:59,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653242900] [2020-10-13 05:11:59,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 05:11:59,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:11:59,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 05:11:59,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=648, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:11:59,894 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 27 states. [2020-10-13 05:12:00,961 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 52 [2020-10-13 05:12:01,682 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 58 [2020-10-13 05:12:02,216 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 59 [2020-10-13 05:12:03,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:03,698 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2020-10-13 05:12:03,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 05:12:03,699 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 42 [2020-10-13 05:12:03,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:03,701 INFO L225 Difference]: With dead ends: 97 [2020-10-13 05:12:03,701 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 05:12:03,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=202, Invalid=2150, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 05:12:03,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 05:12:03,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-10-13 05:12:03,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 05:12:03,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2020-10-13 05:12:03,717 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 42 [2020-10-13 05:12:03,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:03,718 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2020-10-13 05:12:03,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 05:12:03,718 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2020-10-13 05:12:03,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 05:12:03,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:03,720 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:03,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:12:03,720 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:03,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:03,720 INFO L82 PathProgramCache]: Analyzing trace with hash 2141651305, now seen corresponding path program 1 times [2020-10-13 05:12:03,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:03,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248115915] [2020-10-13 05:12:03,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:03,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:03,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:03,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:04,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:04,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:04,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:04,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:05,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:05,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:05,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:05,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:05,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:06,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:06,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:06,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:06,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:06,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:06,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:06,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:06,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:06,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:06,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:06,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:06,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:08,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:08,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 05:12:08,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-13 05:12:08,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:12:08,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:08,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 05:12:08,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:12:08,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 05:12:08,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:12:09,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:09,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:09,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:09,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:09,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:09,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:09,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:09,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:09,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:09,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:09,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:09,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:12:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:09,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:09,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:09,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:09,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:09,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:09,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:09,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:09,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:09,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:09,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:09,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-13 05:12:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:09,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:09,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:09,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:09,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:09,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:12:09,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:09,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:12:09,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:09,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:12:09,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:09,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248115915] [2020-10-13 05:12:09,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:09,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 05:12:09,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047551662] [2020-10-13 05:12:09,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 05:12:09,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:09,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 05:12:09,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:12:09,882 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand 23 states. [2020-10-13 05:12:11,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:11,969 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2020-10-13 05:12:11,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 05:12:11,970 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2020-10-13 05:12:11,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:11,971 INFO L225 Difference]: With dead ends: 91 [2020-10-13 05:12:11,971 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 05:12:11,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=203, Invalid=1437, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 05:12:11,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 05:12:11,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-13 05:12:11,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 05:12:11,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2020-10-13 05:12:11,994 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 44 [2020-10-13 05:12:11,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:11,994 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2020-10-13 05:12:11,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 05:12:11,994 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2020-10-13 05:12:11,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 05:12:11,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:11,998 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:11,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:12:11,998 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:11,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:11,999 INFO L82 PathProgramCache]: Analyzing trace with hash 337058891, now seen corresponding path program 8 times [2020-10-13 05:12:11,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:12,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728966944] [2020-10-13 05:12:12,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:12,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:12,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:12,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:12,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:13,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:14,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:14,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:15,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:15,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:16,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:16,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:16,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:16,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:17,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:17,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 05:12:17,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 05:12:17,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-13 05:12:17,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:17,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:12:17,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 05:12:17,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 05:12:17,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:17,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:17,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:17,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:17,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:17,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:17,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:17,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:17,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:17,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:17,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:17,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:17,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:12:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:17,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:17,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:17,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:17,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:17,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:12:17,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:17,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:17,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:17,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:17,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:17,163 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 05:12:17,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728966944] [2020-10-13 05:12:17,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:17,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:12:17,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906624998] [2020-10-13 05:12:17,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:12:17,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:17,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:12:17,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:12:17,165 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 12 states. [2020-10-13 05:12:17,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:17,610 INFO L93 Difference]: Finished difference Result 136 states and 152 transitions. [2020-10-13 05:12:17,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:12:17,611 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-10-13 05:12:17,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:17,613 INFO L225 Difference]: With dead ends: 136 [2020-10-13 05:12:17,613 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 05:12:17,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:12:17,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 05:12:17,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2020-10-13 05:12:17,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 05:12:17,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2020-10-13 05:12:17,628 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 44 [2020-10-13 05:12:17,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:17,628 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2020-10-13 05:12:17,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:12:17,628 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2020-10-13 05:12:17,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 05:12:17,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:17,629 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:17,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:12:17,630 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:17,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:17,630 INFO L82 PathProgramCache]: Analyzing trace with hash 280312073, now seen corresponding path program 9 times [2020-10-13 05:12:17,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:17,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601235560] [2020-10-13 05:12:17,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:17,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:17,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:17,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:18,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:18,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:19,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:19,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:19,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:20,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:21,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:21,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:21,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:22,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:22,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:22,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 05:12:22,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 05:12:22,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:12:22,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:22,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:12:22,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 05:12:22,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 05:12:22,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:22,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:22,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:22,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:22,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:22,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:22,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:22,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:22,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:22,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:22,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:22,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:22,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:22,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:12:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:22,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:22,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:22,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:22,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:22,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:12:22,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:22,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:22,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:22,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:22,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 05:12:22,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601235560] [2020-10-13 05:12:22,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:22,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:12:22,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330200504] [2020-10-13 05:12:22,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:12:22,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:22,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:12:22,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:12:22,743 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. Second operand 12 states. [2020-10-13 05:12:23,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:23,362 INFO L93 Difference]: Finished difference Result 135 states and 145 transitions. [2020-10-13 05:12:23,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:12:23,363 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-13 05:12:23,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:23,364 INFO L225 Difference]: With dead ends: 135 [2020-10-13 05:12:23,364 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 05:12:23,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:12:23,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 05:12:23,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 88. [2020-10-13 05:12:23,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 05:12:23,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2020-10-13 05:12:23,379 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 46 [2020-10-13 05:12:23,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:23,379 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2020-10-13 05:12:23,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:12:23,379 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2020-10-13 05:12:23,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 05:12:23,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:23,382 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:23,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:12:23,383 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:23,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:23,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1263649401, now seen corresponding path program 10 times [2020-10-13 05:12:23,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:23,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491469884] [2020-10-13 05:12:23,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:23,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:23,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:24,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:24,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:26,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:27,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:27,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:28,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:28,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:28,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 05:12:28,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:12:28,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5073 [2020-10-13 05:12:28,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:28,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 05:12:28,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:12:28,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 05:12:28,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:29,045 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-10-13 05:12:29,189 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 42 [2020-10-13 05:12:29,338 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2020-10-13 05:12:30,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:30,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:30,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:30,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:30,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:30,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:30,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:30,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:30,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:30,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:30,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:30,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:12:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:30,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:30,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:30,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:30,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:30,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:12:30,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:30,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:30,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:30,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:30,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:30,571 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:30,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491469884] [2020-10-13 05:12:30,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:30,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 05:12:30,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371319091] [2020-10-13 05:12:30,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 05:12:30,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:30,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 05:12:30,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:12:30,573 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand 31 states. [2020-10-13 05:12:32,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:32,399 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2020-10-13 05:12:32,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:12:32,400 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 48 [2020-10-13 05:12:32,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:32,401 INFO L225 Difference]: With dead ends: 120 [2020-10-13 05:12:32,402 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 05:12:32,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 05:12:32,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 05:12:32,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 107. [2020-10-13 05:12:32,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 05:12:32,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2020-10-13 05:12:32,416 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 48 [2020-10-13 05:12:32,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:32,417 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2020-10-13 05:12:32,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 05:12:32,417 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2020-10-13 05:12:32,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 05:12:32,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:32,418 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:32,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:12:32,419 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:32,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:32,419 INFO L82 PathProgramCache]: Analyzing trace with hash -628342877, now seen corresponding path program 2 times [2020-10-13 05:12:32,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:32,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974004395] [2020-10-13 05:12:32,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:32,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:32,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:32,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:33,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:33,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:34,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:34,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:34,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:35,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:35,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:35,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:35,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:36,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:36,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:36,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:36,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:36,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:36,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:36,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:37,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:37,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:37,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:37,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 05:12:37,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-13 05:12:37,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:12:37,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:37,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 05:12:37,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:12:37,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 05:12:37,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:37,951 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-10-13 05:12:38,302 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-13 05:12:39,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:39,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:39,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:39,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:39,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:39,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:39,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:39,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:39,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:39,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:39,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:39,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:12:39,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:39,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:39,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:39,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:39,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:39,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:39,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:39,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:39,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:39,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:39,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:39,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 05:12:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:39,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:39,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:39,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:39,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:39,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:12:39,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:39,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:12:39,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:39,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:12:39,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:39,775 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:12:39,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974004395] [2020-10-13 05:12:39,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:39,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 05:12:39,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060331882] [2020-10-13 05:12:39,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 05:12:39,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:39,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 05:12:39,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:12:39,778 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand 31 states. [2020-10-13 05:12:40,205 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 49 [2020-10-13 05:12:40,775 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 53 [2020-10-13 05:12:40,976 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2020-10-13 05:12:41,265 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 53 [2020-10-13 05:12:41,443 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 51 [2020-10-13 05:12:41,671 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 63 [2020-10-13 05:12:41,876 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 48 [2020-10-13 05:12:42,267 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 59 [2020-10-13 05:12:42,504 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-13 05:12:43,193 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 95 [2020-10-13 05:12:43,404 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2020-10-13 05:12:43,596 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-13 05:12:43,918 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-13 05:12:45,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:45,098 INFO L93 Difference]: Finished difference Result 111 states and 118 transitions. [2020-10-13 05:12:45,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 05:12:45,101 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 50 [2020-10-13 05:12:45,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:45,102 INFO L225 Difference]: With dead ends: 111 [2020-10-13 05:12:45,103 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 05:12:45,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=397, Invalid=2909, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 05:12:45,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 05:12:45,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-13 05:12:45,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 05:12:45,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2020-10-13 05:12:45,117 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 50 [2020-10-13 05:12:45,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:45,118 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2020-10-13 05:12:45,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 05:12:45,118 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2020-10-13 05:12:45,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 05:12:45,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:45,119 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:45,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:12:45,119 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:45,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:45,120 INFO L82 PathProgramCache]: Analyzing trace with hash -315307323, now seen corresponding path program 11 times [2020-10-13 05:12:45,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:45,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079499511] [2020-10-13 05:12:45,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:45,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:45,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:47,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:47,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 05:12:47,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:12:47,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2038 [2020-10-13 05:12:47,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:47,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:12:47,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:12:47,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:12:47,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:47,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:47,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:47,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:47,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:47,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:47,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:47,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:47,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:47,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:47,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:47,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:47,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:12:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:47,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:47,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:47,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:47,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:47,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:12:47,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:47,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:47,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:47,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:47,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:47,295 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 05:12:47,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079499511] [2020-10-13 05:12:47,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:47,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:12:47,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35210781] [2020-10-13 05:12:47,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:12:47,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:47,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:12:47,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:12:47,297 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand 14 states. [2020-10-13 05:12:47,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:47,986 INFO L93 Difference]: Finished difference Result 202 states and 223 transitions. [2020-10-13 05:12:47,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:12:47,987 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2020-10-13 05:12:47,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:47,989 INFO L225 Difference]: With dead ends: 202 [2020-10-13 05:12:47,990 INFO L226 Difference]: Without dead ends: 167 [2020-10-13 05:12:47,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:12:47,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-13 05:12:48,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 142. [2020-10-13 05:12:48,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 05:12:48,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 153 transitions. [2020-10-13 05:12:48,009 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 153 transitions. Word has length 50 [2020-10-13 05:12:48,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:48,009 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 153 transitions. [2020-10-13 05:12:48,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:12:48,009 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 153 transitions. [2020-10-13 05:12:48,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 05:12:48,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:48,010 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:48,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:12:48,011 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:48,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:48,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1212371139, now seen corresponding path program 12 times [2020-10-13 05:12:48,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:48,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375740758] [2020-10-13 05:12:48,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:48,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:48,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:48,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:49,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:50,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:50,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:51,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:52,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:53,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:53,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 05:12:53,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:12:53,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:12:53,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:53,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:12:53,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 05:12:53,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:12:53,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:53,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:12:53,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:53,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:53,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:53,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:12:53,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:53,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:53,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:53,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:53,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:53,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:53,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:53,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:12:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:53,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:53,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:53,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:12:53,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:12:53,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:12:53,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:53,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:12:53,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:12:53,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:12:53,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:12:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 05:12:53,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375740758] [2020-10-13 05:12:53,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:12:53,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:12:53,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377335189] [2020-10-13 05:12:53,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:12:53,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:12:53,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:12:53,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:12:53,172 INFO L87 Difference]: Start difference. First operand 142 states and 153 transitions. Second operand 14 states. [2020-10-13 05:12:54,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:12:54,052 INFO L93 Difference]: Finished difference Result 196 states and 211 transitions. [2020-10-13 05:12:54,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:12:54,053 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-10-13 05:12:54,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:12:54,055 INFO L225 Difference]: With dead ends: 196 [2020-10-13 05:12:54,055 INFO L226 Difference]: Without dead ends: 158 [2020-10-13 05:12:54,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:12:54,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-13 05:12:54,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 139. [2020-10-13 05:12:54,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-13 05:12:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 147 transitions. [2020-10-13 05:12:54,074 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 147 transitions. Word has length 52 [2020-10-13 05:12:54,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:12:54,074 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 147 transitions. [2020-10-13 05:12:54,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:12:54,074 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 147 transitions. [2020-10-13 05:12:54,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 05:12:54,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:12:54,075 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:12:54,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:12:54,076 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:12:54,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:12:54,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1091915457, now seen corresponding path program 13 times [2020-10-13 05:12:54,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:12:54,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131357166] [2020-10-13 05:12:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:12:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:12:54,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:54,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:55,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:56,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:57,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:57,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:58,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:12:59,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:12:59,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 05:12:59,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:12:59,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:12:59,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:12:59,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 05:12:59,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:12:59,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 05:12:59,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:00,018 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 46 [2020-10-13 05:13:02,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:02,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:02,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:02,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:02,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:02,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:02,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:02,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:02,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:02,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:02,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:02,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:02,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:13:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:02,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:02,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:02,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:13:02,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:02,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:13:02,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:02,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:02,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:02,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:02,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:13:02,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131357166] [2020-10-13 05:13:02,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:02,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 05:13:02,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217899619] [2020-10-13 05:13:02,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 05:13:02,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:02,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 05:13:02,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1455, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 05:13:02,670 INFO L87 Difference]: Start difference. First operand 139 states and 147 transitions. Second operand 40 states. [2020-10-13 05:13:03,710 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2020-10-13 05:13:04,233 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-13 05:13:04,511 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 59 [2020-10-13 05:13:05,549 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2020-10-13 05:13:06,627 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-13 05:13:07,658 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-10-13 05:13:08,928 WARN L193 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-10-13 05:13:09,298 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-13 05:13:09,818 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-10-13 05:13:10,062 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-13 05:13:10,453 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-10-13 05:13:11,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:11,381 INFO L93 Difference]: Finished difference Result 170 states and 181 transitions. [2020-10-13 05:13:11,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-13 05:13:11,382 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 54 [2020-10-13 05:13:11,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:11,384 INFO L225 Difference]: With dead ends: 170 [2020-10-13 05:13:11,384 INFO L226 Difference]: Without dead ends: 168 [2020-10-13 05:13:11,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=501, Invalid=5505, Unknown=0, NotChecked=0, Total=6006 [2020-10-13 05:13:11,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-13 05:13:11,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 160. [2020-10-13 05:13:11,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-13 05:13:11,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 170 transitions. [2020-10-13 05:13:11,408 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 170 transitions. Word has length 54 [2020-10-13 05:13:11,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:11,408 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 170 transitions. [2020-10-13 05:13:11,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 05:13:11,409 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 170 transitions. [2020-10-13 05:13:11,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 05:13:11,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:11,410 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:11,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:13:11,410 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:11,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:11,410 INFO L82 PathProgramCache]: Analyzing trace with hash 669002333, now seen corresponding path program 3 times [2020-10-13 05:13:11,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:11,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994418137] [2020-10-13 05:13:11,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:11,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:11,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:11,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:12,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:12,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:13,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:14,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:15,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:15,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:16,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:16,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:16,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:16,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 05:13:16,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 05:13:16,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-13 05:13:16,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:16,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 05:13:16,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:13:16,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 05:13:16,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:17,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:17,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:17,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:17,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:17,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:17,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:17,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:17,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:17,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:17,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:17,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:17,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:13:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:17,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:17,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:17,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:13:17,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:17,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:13:17,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:17,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:17,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:17,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:17,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:17,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-13 05:13:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:17,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:17,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:17,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:13:17,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:17,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:13:17,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:17,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:13:17,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:17,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 05:13:17,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:17,343 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 05:13:17,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994418137] [2020-10-13 05:13:17,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:17,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:13:17,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420449326] [2020-10-13 05:13:17,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:13:17,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:17,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:13:17,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:13:17,345 INFO L87 Difference]: Start difference. First operand 160 states and 170 transitions. Second operand 22 states. [2020-10-13 05:13:18,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:18,539 INFO L93 Difference]: Finished difference Result 174 states and 187 transitions. [2020-10-13 05:13:18,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 05:13:18,540 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 56 [2020-10-13 05:13:18,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:18,541 INFO L225 Difference]: With dead ends: 174 [2020-10-13 05:13:18,541 INFO L226 Difference]: Without dead ends: 172 [2020-10-13 05:13:18,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:13:18,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-13 05:13:18,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2020-10-13 05:13:18,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-13 05:13:18,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 182 transitions. [2020-10-13 05:13:18,561 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 182 transitions. Word has length 56 [2020-10-13 05:13:18,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:18,561 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 182 transitions. [2020-10-13 05:13:18,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:13:18,561 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 182 transitions. [2020-10-13 05:13:18,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 05:13:18,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:18,562 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:18,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:13:18,562 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:18,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:18,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1343770745, now seen corresponding path program 4 times [2020-10-13 05:13:18,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:18,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752473649] [2020-10-13 05:13:18,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:18,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:18,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:19,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:19,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:19,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:19,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:20,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:20,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:20,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:20,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:21,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:21,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:21,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:21,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:21,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:22,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:22,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:22,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:22,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:22,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:23,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:23,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:23,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:23,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:23,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:23,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:23,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 05:13:23,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-13 05:13:23,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-13 05:13:23,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:23,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 05:13:23,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:13:23,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 05:13:23,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:24,358 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2020-10-13 05:13:24,624 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2020-10-13 05:13:24,867 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2020-10-13 05:13:25,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:25,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:25,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:25,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:25,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:25,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:25,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:25,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:25,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:25,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:25,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:25,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:13:25,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:25,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:25,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:25,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:13:25,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:25,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:13:25,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:25,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:25,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:25,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:25,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:25,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-13 05:13:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:25,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:25,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:25,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:13:25,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:25,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:25,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:25,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:13:25,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:25,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:13:25,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:25,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-13 05:13:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:25,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:25,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:25,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:13:25,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:25,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:13:25,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:25,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:13:25,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:25,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:13:25,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:13:25,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752473649] [2020-10-13 05:13:25,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:25,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 05:13:25,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297412002] [2020-10-13 05:13:25,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 05:13:25,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:25,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 05:13:25,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:13:25,573 INFO L87 Difference]: Start difference. First operand 170 states and 182 transitions. Second operand 28 states. [2020-10-13 05:13:26,089 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-10-13 05:13:27,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:27,820 INFO L93 Difference]: Finished difference Result 174 states and 184 transitions. [2020-10-13 05:13:27,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 05:13:27,821 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 58 [2020-10-13 05:13:27,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:27,822 INFO L225 Difference]: With dead ends: 174 [2020-10-13 05:13:27,822 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 05:13:27,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=190, Invalid=1880, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 05:13:27,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 05:13:27,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-10-13 05:13:27,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 05:13:27,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2020-10-13 05:13:27,838 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 58 [2020-10-13 05:13:27,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:27,838 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2020-10-13 05:13:27,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 05:13:27,838 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2020-10-13 05:13:27,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 05:13:27,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:27,839 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:27,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:13:27,839 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:27,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:27,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1298122047, now seen corresponding path program 14 times [2020-10-13 05:13:27,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:27,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694400210] [2020-10-13 05:13:27,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:27,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:27,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:29,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:30,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:31,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:32,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:33,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:33,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 05:13:33,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:13:33,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5519 [2020-10-13 05:13:33,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:33,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:13:33,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 05:13:33,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 05:13:33,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:33,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:33,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:33,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:33,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:33,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:33,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:33,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:33,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:33,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:33,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:33,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:13:33,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:13:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:33,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:33,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:33,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:13:33,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:33,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:13:33,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:33,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:33,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:33,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:33,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:13:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 05:13:33,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694400210] [2020-10-13 05:13:33,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:33,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:13:33,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72882099] [2020-10-13 05:13:33,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:13:33,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:33,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:13:33,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:13:33,561 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand 16 states. [2020-10-13 05:13:34,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:34,585 INFO L93 Difference]: Finished difference Result 233 states and 258 transitions. [2020-10-13 05:13:34,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 05:13:34,586 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 56 [2020-10-13 05:13:34,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:34,587 INFO L225 Difference]: With dead ends: 233 [2020-10-13 05:13:34,587 INFO L226 Difference]: Without dead ends: 197 [2020-10-13 05:13:34,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:13:34,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-13 05:13:34,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 174. [2020-10-13 05:13:34,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-13 05:13:34,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 189 transitions. [2020-10-13 05:13:34,621 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 189 transitions. Word has length 56 [2020-10-13 05:13:34,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:34,621 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 189 transitions. [2020-10-13 05:13:34,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:13:34,621 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 189 transitions. [2020-10-13 05:13:34,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 05:13:34,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:34,622 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:34,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:13:34,622 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:34,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:34,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1317604099, now seen corresponding path program 15 times [2020-10-13 05:13:34,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:34,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402886738] [2020-10-13 05:13:34,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:34,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:34,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:36,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:37,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:38,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:39,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:39,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 05:13:39,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:13:39,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-13 05:13:39,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:39,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:13:39,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 05:13:39,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 05:13:39,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:39,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:39,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:39,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:39,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:39,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:39,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:39,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:39,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:39,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:39,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:39,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:39,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:39,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:13:39,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:39,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:39,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:39,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:13:39,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:39,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:13:39,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:39,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:39,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:39,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:39,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 05:13:39,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402886738] [2020-10-13 05:13:39,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:39,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:13:39,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902250853] [2020-10-13 05:13:39,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:13:39,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:39,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:13:39,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:13:39,831 INFO L87 Difference]: Start difference. First operand 174 states and 189 transitions. Second operand 16 states. [2020-10-13 05:13:41,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:13:41,125 INFO L93 Difference]: Finished difference Result 234 states and 253 transitions. [2020-10-13 05:13:41,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:13:41,127 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2020-10-13 05:13:41,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:13:41,128 INFO L225 Difference]: With dead ends: 234 [2020-10-13 05:13:41,129 INFO L226 Difference]: Without dead ends: 188 [2020-10-13 05:13:41,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:13:41,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-13 05:13:41,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 171. [2020-10-13 05:13:41,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-13 05:13:41,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 183 transitions. [2020-10-13 05:13:41,154 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 183 transitions. Word has length 58 [2020-10-13 05:13:41,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:13:41,154 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 183 transitions. [2020-10-13 05:13:41,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:13:41,154 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 183 transitions. [2020-10-13 05:13:41,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 05:13:41,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:13:41,155 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:13:41,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 05:13:41,156 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:13:41,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:13:41,156 INFO L82 PathProgramCache]: Analyzing trace with hash 737201275, now seen corresponding path program 16 times [2020-10-13 05:13:41,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:13:41,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863464636] [2020-10-13 05:13:41,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:13:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:41,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:42,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:44,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:45,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:46,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:46,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 05:13:46,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:13:46,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 05:13:46,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:46,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 05:13:46,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:13:46,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 05:13:46,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:47,227 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-13 05:13:47,412 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-13 05:13:47,805 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2020-10-13 05:13:48,040 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-13 05:13:48,321 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2020-10-13 05:13:48,524 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2020-10-13 05:13:48,775 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2020-10-13 05:13:48,991 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-13 05:13:49,299 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 66 [2020-10-13 05:13:49,522 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-10-13 05:13:49,787 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 52 [2020-10-13 05:13:50,006 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2020-10-13 05:13:50,246 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2020-10-13 05:13:52,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:13:52,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:52,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:52,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:52,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:13:52,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:52,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:13:52,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:52,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:52,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:52,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:52,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:13:52,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:13:52,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:13:52,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:13:52,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:13:52,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:13:52,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:13:52,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:13:52,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:13:52,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:13:52,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:13:52,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:13:52,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:13:52,375 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 8 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:13:52,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863464636] [2020-10-13 05:13:52,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:13:52,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 05:13:52,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208720084] [2020-10-13 05:13:52,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 05:13:52,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:13:52,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 05:13:52,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1585, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 05:13:52,378 INFO L87 Difference]: Start difference. First operand 171 states and 183 transitions. Second operand 43 states. [2020-10-13 05:13:52,633 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 37 [2020-10-13 05:13:54,124 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 75 [2020-10-13 05:13:54,619 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 58 [2020-10-13 05:13:55,070 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 64 [2020-10-13 05:13:55,702 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 58 [2020-10-13 05:13:56,042 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 51 [2020-10-13 05:13:56,305 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 50 [2020-10-13 05:13:56,711 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 60 [2020-10-13 05:13:57,088 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 72 [2020-10-13 05:13:57,383 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 45 [2020-10-13 05:13:57,639 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2020-10-13 05:13:57,999 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2020-10-13 05:13:58,230 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 50 [2020-10-13 05:13:58,806 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 56 [2020-10-13 05:13:59,469 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 97 [2020-10-13 05:13:59,668 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 47 [2020-10-13 05:14:00,053 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2020-10-13 05:14:00,363 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2020-10-13 05:14:00,773 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 58 [2020-10-13 05:14:01,172 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 60 [2020-10-13 05:14:01,376 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2020-10-13 05:14:01,658 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 22 [2020-10-13 05:14:02,253 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 98 [2020-10-13 05:14:02,567 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 34 [2020-10-13 05:14:02,857 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-10-13 05:14:03,136 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 44 [2020-10-13 05:14:03,557 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 69 [2020-10-13 05:14:03,964 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 64 [2020-10-13 05:14:04,279 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-10-13 05:14:04,710 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 72 [2020-10-13 05:14:05,073 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 52 [2020-10-13 05:14:05,368 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2020-10-13 05:14:05,848 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-10-13 05:14:06,362 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 82 [2020-10-13 05:14:06,779 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 75 [2020-10-13 05:14:07,067 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 48 [2020-10-13 05:14:07,673 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 75 [2020-10-13 05:14:08,041 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 75 [2020-10-13 05:14:08,350 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-10-13 05:14:08,704 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-13 05:14:09,133 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 83 [2020-10-13 05:14:09,480 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2020-10-13 05:14:09,782 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-13 05:14:10,312 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 48 [2020-10-13 05:14:10,870 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 58 [2020-10-13 05:14:11,271 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-10-13 05:14:11,690 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2020-10-13 05:14:11,965 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-13 05:14:12,391 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 66 [2020-10-13 05:14:12,992 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 87 [2020-10-13 05:14:13,299 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2020-10-13 05:14:13,522 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-10-13 05:14:13,859 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 50 [2020-10-13 05:14:14,186 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 67 [2020-10-13 05:14:14,401 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 33 [2020-10-13 05:14:14,791 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 66 [2020-10-13 05:14:15,416 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 32 [2020-10-13 05:14:15,892 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 74 [2020-10-13 05:14:16,358 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 64 [2020-10-13 05:14:16,737 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 51 [2020-10-13 05:14:17,176 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 76 [2020-10-13 05:14:17,728 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2020-10-13 05:14:18,085 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 33 [2020-10-13 05:14:18,569 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 66 [2020-10-13 05:14:18,841 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 35 [2020-10-13 05:14:19,204 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 58 [2020-10-13 05:14:19,767 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-13 05:14:19,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:19,879 INFO L93 Difference]: Finished difference Result 226 states and 246 transitions. [2020-10-13 05:14:19,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-10-13 05:14:19,885 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 60 [2020-10-13 05:14:19,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:19,887 INFO L225 Difference]: With dead ends: 226 [2020-10-13 05:14:19,887 INFO L226 Difference]: Without dead ends: 224 [2020-10-13 05:14:19,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4125 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=1822, Invalid=12458, Unknown=0, NotChecked=0, Total=14280 [2020-10-13 05:14:19,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-13 05:14:19,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 194. [2020-10-13 05:14:19,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-13 05:14:19,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 208 transitions. [2020-10-13 05:14:19,923 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 208 transitions. Word has length 60 [2020-10-13 05:14:19,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:19,923 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 208 transitions. [2020-10-13 05:14:19,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 05:14:19,923 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 208 transitions. [2020-10-13 05:14:19,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 05:14:19,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:19,924 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:19,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 05:14:19,924 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:19,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:19,925 INFO L82 PathProgramCache]: Analyzing trace with hash -509943501, now seen corresponding path program 5 times [2020-10-13 05:14:19,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:19,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876829002] [2020-10-13 05:14:19,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:19,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:20,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:20,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:21,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:21,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:22,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:22,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:23,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:24,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:24,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:24,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 05:14:24,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:14:24,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 05:14:24,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:24,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 05:14:24,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:14:24,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 05:14:24,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:25,353 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 27 [2020-10-13 05:14:25,643 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2020-10-13 05:14:25,830 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2020-10-13 05:14:26,050 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 44 [2020-10-13 05:14:26,269 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 44 [2020-10-13 05:14:26,429 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2020-10-13 05:14:26,635 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 44 [2020-10-13 05:14:26,943 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2020-10-13 05:14:27,193 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2020-10-13 05:14:27,371 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2020-10-13 05:14:27,581 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47 [2020-10-13 05:14:27,799 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2020-10-13 05:14:27,985 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2020-10-13 05:14:28,320 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2020-10-13 05:14:28,600 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 43 [2020-10-13 05:14:29,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:29,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:29,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:29,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:29,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:29,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:29,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:29,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:29,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:29,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:29,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:29,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:14:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:29,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:29,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:29,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:29,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:29,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:14:29,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:29,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:29,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:29,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:29,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:29,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-13 05:14:29,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:29,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:29,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:29,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:29,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:29,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:29,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:29,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:14:29,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:29,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:14:29,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:29,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-13 05:14:29,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:29,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:29,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:29,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:29,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:29,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:29,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:29,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:14:29,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:29,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:14:29,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:30,017 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:14:30,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876829002] [2020-10-13 05:14:30,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:30,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 05:14:30,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165504585] [2020-10-13 05:14:30,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 05:14:30,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:30,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 05:14:30,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1147, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:14:30,019 INFO L87 Difference]: Start difference. First operand 194 states and 208 transitions. Second operand 36 states. [2020-10-13 05:14:30,261 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 17 [2020-10-13 05:14:30,509 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 3 [2020-10-13 05:14:30,769 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 15 [2020-10-13 05:14:31,583 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 50 [2020-10-13 05:14:31,985 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 49 [2020-10-13 05:14:32,282 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2020-10-13 05:14:32,557 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2020-10-13 05:14:32,820 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-10-13 05:14:33,365 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 69 [2020-10-13 05:14:33,555 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-10-13 05:14:33,996 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 57 [2020-10-13 05:14:34,398 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 58 [2020-10-13 05:14:35,136 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 78 [2020-10-13 05:14:35,509 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2020-10-13 05:14:35,855 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2020-10-13 05:14:36,160 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-13 05:14:36,822 WARN L193 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 69 [2020-10-13 05:14:37,396 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 76 [2020-10-13 05:14:38,049 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 86 [2020-10-13 05:14:38,322 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-13 05:14:38,952 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 85 [2020-10-13 05:14:39,607 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 81 [2020-10-13 05:14:40,122 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 51 [2020-10-13 05:14:40,621 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-10-13 05:14:41,011 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-10-13 05:14:41,448 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-13 05:14:41,752 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 58 [2020-10-13 05:14:42,323 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 54 [2020-10-13 05:14:42,674 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2020-10-13 05:14:43,349 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-13 05:14:44,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:44,528 INFO L93 Difference]: Finished difference Result 202 states and 215 transitions. [2020-10-13 05:14:44,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 05:14:44,530 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 64 [2020-10-13 05:14:44,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:44,531 INFO L225 Difference]: With dead ends: 202 [2020-10-13 05:14:44,532 INFO L226 Difference]: Without dead ends: 200 [2020-10-13 05:14:44,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=579, Invalid=4533, Unknown=0, NotChecked=0, Total=5112 [2020-10-13 05:14:44,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-13 05:14:44,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 198. [2020-10-13 05:14:44,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-13 05:14:44,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 211 transitions. [2020-10-13 05:14:44,568 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 211 transitions. Word has length 64 [2020-10-13 05:14:44,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:44,569 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 211 transitions. [2020-10-13 05:14:44,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 05:14:44,569 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 211 transitions. [2020-10-13 05:14:44,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 05:14:44,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:44,570 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:44,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 05:14:44,570 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:44,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:44,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1816310599, now seen corresponding path program 17 times [2020-10-13 05:14:44,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:44,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107983952] [2020-10-13 05:14:44,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:44,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:44,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:49,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:49,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 05:14:49,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:14:49,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 05:14:49,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:49,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:14:49,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:14:49,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 05:14:49,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:49,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:49,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:49,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:49,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:49,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:49,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:49,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:49,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:49,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:49,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:49,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:49,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:14:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:49,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:49,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:49,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:49,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:49,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:14:49,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:49,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:49,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:49,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:49,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 05:14:49,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107983952] [2020-10-13 05:14:49,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:49,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:14:49,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564791112] [2020-10-13 05:14:49,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:14:49,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:49,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:14:49,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:14:49,889 INFO L87 Difference]: Start difference. First operand 198 states and 211 transitions. Second operand 18 states. [2020-10-13 05:14:51,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:51,639 INFO L93 Difference]: Finished difference Result 319 states and 350 transitions. [2020-10-13 05:14:51,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:14:51,641 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2020-10-13 05:14:51,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:51,644 INFO L225 Difference]: With dead ends: 319 [2020-10-13 05:14:51,644 INFO L226 Difference]: Without dead ends: 272 [2020-10-13 05:14:51,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=330, Invalid=1002, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:14:51,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-13 05:14:51,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 245. [2020-10-13 05:14:51,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-10-13 05:14:51,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 264 transitions. [2020-10-13 05:14:51,693 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 264 transitions. Word has length 62 [2020-10-13 05:14:51,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:51,693 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 264 transitions. [2020-10-13 05:14:51,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:14:51,693 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 264 transitions. [2020-10-13 05:14:51,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 05:14:51,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:51,694 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:51,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 05:14:51,695 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:51,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:51,695 INFO L82 PathProgramCache]: Analyzing trace with hash -2110995017, now seen corresponding path program 18 times [2020-10-13 05:14:51,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:51,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376788405] [2020-10-13 05:14:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:51,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:51,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:55,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:56,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:56,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 05:14:56,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:14:56,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:14:56,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:56,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:14:56,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 05:14:56,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 05:14:56,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:56,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:14:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:56,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:56,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:56,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:14:56,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:56,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:14:56,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:56,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:56,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:56,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:56,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:56,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:14:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:56,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:14:56,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:14:56,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:14:56,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:14:56,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:14:56,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:14:56,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:14:56,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:14:56,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:14:56,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:14:56,967 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 05:14:56,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376788405] [2020-10-13 05:14:56,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:14:56,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:14:56,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644010186] [2020-10-13 05:14:56,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:14:56,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:14:56,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:14:56,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:14:56,969 INFO L87 Difference]: Start difference. First operand 245 states and 264 transitions. Second operand 18 states. [2020-10-13 05:14:59,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:14:59,011 INFO L93 Difference]: Finished difference Result 315 states and 340 transitions. [2020-10-13 05:14:59,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:14:59,013 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 64 [2020-10-13 05:14:59,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:14:59,015 INFO L225 Difference]: With dead ends: 315 [2020-10-13 05:14:59,015 INFO L226 Difference]: Without dead ends: 263 [2020-10-13 05:14:59,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:14:59,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-13 05:14:59,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 242. [2020-10-13 05:14:59,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-13 05:14:59,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 258 transitions. [2020-10-13 05:14:59,053 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 258 transitions. Word has length 64 [2020-10-13 05:14:59,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:14:59,053 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 258 transitions. [2020-10-13 05:14:59,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:14:59,054 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 258 transitions. [2020-10-13 05:14:59,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 05:14:59,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:14:59,054 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:14:59,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 05:14:59,055 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:14:59,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:14:59,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1502259531, now seen corresponding path program 19 times [2020-10-13 05:14:59,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:14:59,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700303367] [2020-10-13 05:14:59,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:14:59,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:14:59,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:01,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:03,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:15:04,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:15:04,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 05:15:04,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:15:04,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5712 [2020-10-13 05:15:04,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:15:04,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-13 05:15:04,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:15:04,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 05:15:04,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:15:05,585 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2020-10-13 05:15:06,150 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-10-13 05:15:06,310 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-10-13 05:15:06,567 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-10-13 05:15:06,828 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-10-13 05:15:07,131 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2020-10-13 05:15:07,329 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-10-13 05:15:07,707 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 59 [2020-10-13 05:15:07,981 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2020-10-13 05:15:08,362 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2020-10-13 05:15:08,649 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2020-10-13 05:15:08,990 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 58 [2020-10-13 05:15:09,266 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 49 [2020-10-13 05:15:09,588 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 54 [2020-10-13 05:15:09,907 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 46 [2020-10-13 05:15:10,234 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2020-10-13 05:15:10,504 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 39 [2020-10-13 05:15:10,816 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 43 [2020-10-13 05:15:11,091 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 37 [2020-10-13 05:15:11,405 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 38 [2020-10-13 05:15:11,669 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 28 [2020-10-13 05:15:11,960 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 26