/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-lopstr16/break-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:15:57,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:15:57,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:15:57,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:15:57,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:15:57,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:15:57,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:15:57,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:15:57,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:15:57,309 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:15:57,310 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:15:57,311 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:15:57,312 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:15:57,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:15:57,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:15:57,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:15:57,316 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:15:57,317 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:15:57,318 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:15:57,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:15:57,322 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:15:57,323 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:15:57,324 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:15:57,328 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:15:57,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:15:57,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:15:57,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:15:57,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:15:57,338 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:15:57,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:15:57,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:15:57,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:15:57,342 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:15:57,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:15:57,345 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:15:57,345 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:15:57,346 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:15:57,346 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:15:57,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:15:57,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:15:57,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:15:57,350 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 05:15:57,402 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:15:57,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:15:57,403 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:15:57,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:15:57,404 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:15:57,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:15:57,404 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:15:57,404 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:15:57,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:15:57,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:15:57,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:15:57,406 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:15:57,406 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:15:57,407 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:15:57,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:15:57,407 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:15:57,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:15:57,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:15:57,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:15:57,408 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:15:57,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:15:57,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:15:57,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:15:57,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:15:57,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:15:57,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:15:57,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:15:57,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:15:57,410 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:15:57,410 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 05:15:57,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:15:57,753 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:15:57,759 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:15:57,761 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:15:57,763 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:15:57,763 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/break-1.i [2020-10-13 05:15:57,824 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b144d9172/c595c6fa1b1c415b916f73f2c5f5a106/FLAG38af39a32 [2020-10-13 05:15:58,313 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:15:58,314 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-lopstr16/break-1.i [2020-10-13 05:15:58,320 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b144d9172/c595c6fa1b1c415b916f73f2c5f5a106/FLAG38af39a32 [2020-10-13 05:15:58,730 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b144d9172/c595c6fa1b1c415b916f73f2c5f5a106 [2020-10-13 05:15:58,738 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:15:58,740 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:15:58,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:15:58,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:15:58,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:15:58,746 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:15:58" (1/1) ... [2020-10-13 05:15:58,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18cc86df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:15:58, skipping insertion in model container [2020-10-13 05:15:58,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:15:58" (1/1) ... [2020-10-13 05:15:58,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:15:58,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:15:58,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:16:23,182 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:16:23,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:16:23,222 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:16:23,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:16:23 WrapperNode [2020-10-13 05:16:23,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:16:23,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:16:23,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:16:23,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:16:23,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:16:23" (1/1) ... [2020-10-13 05:16:23,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:16:23" (1/1) ... [2020-10-13 05:16:23,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:16:23" (1/1) ... [2020-10-13 05:16:23,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:16:23" (1/1) ... [2020-10-13 05:16:23,262 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:16:23" (1/1) ... [2020-10-13 05:16:23,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:16:23" (1/1) ... [2020-10-13 05:16:23,269 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:16:23" (1/1) ... [2020-10-13 05:16:23,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:16:23,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:16:23,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:16:23,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:16:23,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:16:23" (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 05:16:23,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:16:23,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:16:23,354 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:16:23,354 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:16:23,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:16:23,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:16:23,355 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 05:16:23,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:16:23,356 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:16:23,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 05:16:23,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-13 05:16:23,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-13 05:16:23,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:16:23,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:16:23,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:16:23,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:16:23,644 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:16:23,644 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 05:16:23,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:16:23 BoogieIcfgContainer [2020-10-13 05:16:23,649 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:16:23,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:16:23,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:16:23,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:16:23,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:15:58" (1/3) ... [2020-10-13 05:16:23,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c904b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:16:23, skipping insertion in model container [2020-10-13 05:16:23,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:16:23" (2/3) ... [2020-10-13 05:16:23,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c904b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:16:23, skipping insertion in model container [2020-10-13 05:16:23,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:16:23" (3/3) ... [2020-10-13 05:16:23,659 INFO L109 eAbstractionObserver]: Analyzing ICFG break-1.i [2020-10-13 05:16:23,671 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:16:23,679 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:16:23,694 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:16:23,724 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:16:23,725 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:16:23,725 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:16:23,725 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:16:23,725 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:16:23,725 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:16:23,726 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:16:23,726 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:16:23,745 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-13 05:16:23,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 05:16:23,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:23,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:23,753 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:23,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:23,764 INFO L82 PathProgramCache]: Analyzing trace with hash 547567586, now seen corresponding path program 1 times [2020-10-13 05:16:23,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:23,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816560309] [2020-10-13 05:16:23,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:23,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:24,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:24,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 05:16:24,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:24,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-13 05:16:24,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:24,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:24,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:16:24,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:24,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 05:16:24,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:24,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:24,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:24,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:24,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:24,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 05:16:24,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:24,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:24,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:24,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:24,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:24,165 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 05:16:24,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816560309] [2020-10-13 05:16:24,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:16:24,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:16:24,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337361909] [2020-10-13 05:16:24,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:16:24,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:24,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:16:24,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:16:24,193 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-10-13 05:16:24,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:24,304 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2020-10-13 05:16:24,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:16:24,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-13 05:16:24,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:24,317 INFO L225 Difference]: With dead ends: 54 [2020-10-13 05:16:24,317 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 05:16:24,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:16:24,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 05:16:24,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 21. [2020-10-13 05:16:24,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 05:16:24,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-10-13 05:16:24,370 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2020-10-13 05:16:24,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:24,370 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-10-13 05:16:24,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:16:24,371 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-10-13 05:16:24,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-13 05:16:24,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:24,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:24,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:16:24,372 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:24,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:24,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1443476915, now seen corresponding path program 1 times [2020-10-13 05:16:24,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:24,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288171398] [2020-10-13 05:16:24,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:24,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:24,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:24,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-13 05:16:24,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:24,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 124 [2020-10-13 05:16:24,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:24,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:16:24,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:16:24,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 05:16:24,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:24,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:24,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:24,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:24,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:24,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:24,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:24,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 05:16:24,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:24,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:24,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:24,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:24,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:16:24,612 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 05:16:24,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288171398] [2020-10-13 05:16:24,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:16:24,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:16:24,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672593986] [2020-10-13 05:16:24,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:16:24,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:24,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:16:24,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:16:24,617 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 4 states. [2020-10-13 05:16:24,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:24,757 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2020-10-13 05:16:24,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:16:24,758 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-13 05:16:24,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:24,760 INFO L225 Difference]: With dead ends: 52 [2020-10-13 05:16:24,760 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 05:16:24,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:16:24,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 05:16:24,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 22. [2020-10-13 05:16:24,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 05:16:24,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-13 05:16:24,770 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2020-10-13 05:16:24,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:24,771 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-13 05:16:24,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:16:24,771 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-13 05:16:24,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 05:16:24,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:24,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:24,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:16:24,773 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:24,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:24,773 INFO L82 PathProgramCache]: Analyzing trace with hash -796107231, now seen corresponding path program 1 times [2020-10-13 05:16:24,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:24,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812924288] [2020-10-13 05:16:24,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:24,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:24,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:24,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:24,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 05:16:24,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:24,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-13 05:16:24,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:24,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:16:24,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 05:16:24,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 05:16:24,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:24,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:24,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:24,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:24,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:24,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:24,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:16:24,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:24,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:24,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:24,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:24,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:24,902 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 05:16:24,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812924288] [2020-10-13 05:16:24,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:16:24,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:16:24,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768877663] [2020-10-13 05:16:24,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:16:24,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:24,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:16:24,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:16:24,905 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 4 states. [2020-10-13 05:16:25,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:25,003 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2020-10-13 05:16:25,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:16:25,004 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-13 05:16:25,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:25,005 INFO L225 Difference]: With dead ends: 42 [2020-10-13 05:16:25,005 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 05:16:25,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:16:25,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 05:16:25,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-13 05:16:25,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 05:16:25,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-13 05:16:25,013 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 15 [2020-10-13 05:16:25,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:25,013 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-13 05:16:25,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:16:25,013 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-13 05:16:25,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 05:16:25,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:25,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:25,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:16:25,015 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:25,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:25,016 INFO L82 PathProgramCache]: Analyzing trace with hash 2000433480, now seen corresponding path program 1 times [2020-10-13 05:16:25,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:25,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108439702] [2020-10-13 05:16:25,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:25,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:25,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:25,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:25,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 05:16:25,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:16:25,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-10-13 05:16:25,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:25,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:16:25,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:16:25,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 05:16:25,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:16:25,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:25,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:25,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:25,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:25,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:25,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:16:25,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:25,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:25,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:25,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:25,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:16:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:16:25,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108439702] [2020-10-13 05:16:25,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:25,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 05:16:25,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337972119] [2020-10-13 05:16:25,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:16:25,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:25,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:16:25,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:16:25,476 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 5 states. [2020-10-13 05:16:25,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:25,636 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-10-13 05:16:25,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:16:25,636 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-13 05:16:25,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:25,638 INFO L225 Difference]: With dead ends: 49 [2020-10-13 05:16:25,638 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 05:16:25,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:16:25,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 05:16:25,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2020-10-13 05:16:25,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 05:16:25,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-13 05:16:25,654 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 17 [2020-10-13 05:16:25,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:25,655 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-13 05:16:25,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:16:25,655 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-13 05:16:25,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 05:16:25,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:25,658 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:25,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:16:25,659 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:25,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:25,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1356244077, now seen corresponding path program 2 times [2020-10-13 05:16:25,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:25,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541136142] [2020-10-13 05:16:25,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:25,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:25,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:26,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:26,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 05:16:26,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:16:26,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 398 [2020-10-13 05:16:26,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:26,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:16:26,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:16:26,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 05:16:26,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:26,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:26,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:26,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:26,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:26,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:26,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:16:26,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:26,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:26,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:26,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:26,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:26,149 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:16:26,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541136142] [2020-10-13 05:16:26,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:26,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 05:16:26,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896943318] [2020-10-13 05:16:26,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:16:26,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:26,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:16:26,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:16:26,152 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 6 states. [2020-10-13 05:16:26,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:26,296 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2020-10-13 05:16:26,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 05:16:26,297 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-13 05:16:26,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:26,298 INFO L225 Difference]: With dead ends: 57 [2020-10-13 05:16:26,298 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 05:16:26,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:16:26,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 05:16:26,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 28. [2020-10-13 05:16:26,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 05:16:26,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-13 05:16:26,306 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 20 [2020-10-13 05:16:26,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:26,307 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-13 05:16:26,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:16:26,307 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-13 05:16:26,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 05:16:26,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:26,308 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:26,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:16:26,309 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:26,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:26,309 INFO L82 PathProgramCache]: Analyzing trace with hash 223617832, now seen corresponding path program 3 times [2020-10-13 05:16:26,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:26,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845777913] [2020-10-13 05:16:26,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:26,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:26,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:26,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:26,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 05:16:26,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:16:26,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-13 05:16:26,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:26,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 05:16:26,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:16:26,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 05:16:26,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:26,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:26,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:26,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:26,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:26,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:26,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:26,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:16:26,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:26,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:26,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:26,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:26,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:26,826 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 05:16:26,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845777913] [2020-10-13 05:16:26,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:26,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 05:16:26,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034611638] [2020-10-13 05:16:26,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 05:16:26,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:26,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 05:16:26,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:16:26,829 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 7 states. [2020-10-13 05:16:27,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:27,002 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2020-10-13 05:16:27,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:16:27,003 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2020-10-13 05:16:27,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:27,004 INFO L225 Difference]: With dead ends: 65 [2020-10-13 05:16:27,004 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 05:16:27,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:16:27,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 05:16:27,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 31. [2020-10-13 05:16:27,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 05:16:27,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-13 05:16:27,012 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 23 [2020-10-13 05:16:27,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:27,012 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-13 05:16:27,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 05:16:27,012 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-13 05:16:27,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 05:16:27,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:27,013 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:27,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:16:27,014 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:27,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:27,014 INFO L82 PathProgramCache]: Analyzing trace with hash -581769587, now seen corresponding path program 4 times [2020-10-13 05:16:27,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:27,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282552908] [2020-10-13 05:16:27,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:27,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:27,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:28,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:28,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 05:16:28,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:16:28,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1472 [2020-10-13 05:16:28,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:28,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:16:28,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:16:28,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:16:28,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:28,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:28,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:28,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:28,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:28,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:28,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:16:28,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:28,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:28,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:28,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:28,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:16:28,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282552908] [2020-10-13 05:16:28,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:28,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:16:28,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414152638] [2020-10-13 05:16:28,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:16:28,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:28,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:16:28,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:16:28,583 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 8 states. [2020-10-13 05:16:28,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:28,771 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2020-10-13 05:16:28,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 05:16:28,771 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-13 05:16:28,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:28,772 INFO L225 Difference]: With dead ends: 73 [2020-10-13 05:16:28,773 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 05:16:28,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:16:28,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 05:16:28,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 34. [2020-10-13 05:16:28,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 05:16:28,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2020-10-13 05:16:28,780 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 26 [2020-10-13 05:16:28,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:28,780 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2020-10-13 05:16:28,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:16:28,781 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2020-10-13 05:16:28,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 05:16:28,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:28,782 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:28,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:16:28,782 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:28,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:28,783 INFO L82 PathProgramCache]: Analyzing trace with hash 2103913736, now seen corresponding path program 5 times [2020-10-13 05:16:28,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:28,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314028711] [2020-10-13 05:16:28,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:28,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:28,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:29,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:29,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 05:16:29,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:16:29,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 862 [2020-10-13 05:16:29,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:29,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 05:16:29,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:16:29,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 05:16:29,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:16:29,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:29,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:29,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:29,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:29,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:29,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:29,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:16:29,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:29,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:29,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:29,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:29,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:16:29,791 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:16:29,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314028711] [2020-10-13 05:16:29,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:29,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:16:29,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854207103] [2020-10-13 05:16:29,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:16:29,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:29,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:16:29,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:16:29,794 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 9 states. [2020-10-13 05:16:30,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:30,095 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-10-13 05:16:30,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:16:30,096 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-10-13 05:16:30,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:30,098 INFO L225 Difference]: With dead ends: 81 [2020-10-13 05:16:30,098 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 05:16:30,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:16:30,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 05:16:30,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 37. [2020-10-13 05:16:30,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 05:16:30,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-13 05:16:30,105 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 29 [2020-10-13 05:16:30,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:30,106 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-13 05:16:30,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:16:30,106 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-13 05:16:30,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 05:16:30,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:30,107 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:30,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:16:30,108 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:30,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:30,108 INFO L82 PathProgramCache]: Analyzing trace with hash 350032045, now seen corresponding path program 6 times [2020-10-13 05:16:30,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:30,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203228345] [2020-10-13 05:16:30,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:30,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:30,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:30,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:32,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:32,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 05:16:32,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:16:32,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2311 [2020-10-13 05:16:32,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:32,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:16:32,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:16:32,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:16:32,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:32,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:32,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:32,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:32,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:32,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:32,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:16:32,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:32,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:32,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:32,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:32,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:16:32,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203228345] [2020-10-13 05:16:32,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:32,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:16:32,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382824061] [2020-10-13 05:16:32,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:16:32,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:32,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:16:32,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:16:32,553 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 10 states. [2020-10-13 05:16:32,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:32,925 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2020-10-13 05:16:32,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 05:16:32,926 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-10-13 05:16:32,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:32,928 INFO L225 Difference]: With dead ends: 89 [2020-10-13 05:16:32,928 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 05:16:32,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:16:32,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 05:16:32,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 40. [2020-10-13 05:16:32,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 05:16:32,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-13 05:16:32,950 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 32 [2020-10-13 05:16:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:32,950 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-13 05:16:32,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:16:32,951 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-13 05:16:32,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 05:16:32,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:32,952 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:32,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:16:32,954 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:32,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:32,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1262268696, now seen corresponding path program 7 times [2020-10-13 05:16:32,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:32,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960796786] [2020-10-13 05:16:32,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:32,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:33,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:34,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:34,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 05:16:34,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:16:34,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1884 [2020-10-13 05:16:34,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:34,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 05:16:34,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:16:34,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 05:16:34,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:34,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:34,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:34,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:34,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:34,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:34,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:16:34,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:34,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:34,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:34,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:34,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:16:34,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960796786] [2020-10-13 05:16:34,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:34,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 05:16:34,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460686310] [2020-10-13 05:16:34,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 05:16:34,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:34,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 05:16:34,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:16:34,995 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 11 states. [2020-10-13 05:16:35,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:35,310 INFO L93 Difference]: Finished difference Result 97 states and 107 transitions. [2020-10-13 05:16:35,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:16:35,311 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-10-13 05:16:35,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:35,312 INFO L225 Difference]: With dead ends: 97 [2020-10-13 05:16:35,312 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 05:16:35,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:16:35,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 05:16:35,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 43. [2020-10-13 05:16:35,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 05:16:35,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-13 05:16:35,324 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 35 [2020-10-13 05:16:35,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:35,324 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-13 05:16:35,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 05:16:35,325 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-13 05:16:35,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 05:16:35,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:35,330 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:35,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:16:35,331 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:35,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:35,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1600594637, now seen corresponding path program 8 times [2020-10-13 05:16:35,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:35,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782963374] [2020-10-13 05:16:35,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:35,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:35,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:37,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:37,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 05:16:37,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:16:37,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1948 [2020-10-13 05:16:37,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:37,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:16:37,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:16:37,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 05:16:37,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:37,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:37,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:37,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:37,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:37,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:37,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:16:37,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:37,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:37,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:37,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:37,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:37,450 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:16:37,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782963374] [2020-10-13 05:16:37,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:37,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:16:37,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453362381] [2020-10-13 05:16:37,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:16:37,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:37,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:16:37,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:16:37,454 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 12 states. [2020-10-13 05:16:37,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:37,747 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2020-10-13 05:16:37,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 05:16:37,748 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2020-10-13 05:16:37,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:37,749 INFO L225 Difference]: With dead ends: 105 [2020-10-13 05:16:37,749 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 05:16:37,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:16:37,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 05:16:37,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 46. [2020-10-13 05:16:37,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 05:16:37,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-13 05:16:37,763 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 38 [2020-10-13 05:16:37,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:37,765 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-13 05:16:37,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:16:37,765 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-13 05:16:37,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 05:16:37,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:37,766 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:37,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:16:37,766 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:37,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:37,767 INFO L82 PathProgramCache]: Analyzing trace with hash -298415928, now seen corresponding path program 9 times [2020-10-13 05:16:37,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:37,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459670189] [2020-10-13 05:16:37,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:37,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:37,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:40,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:40,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 05:16:40,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:16:40,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2341 [2020-10-13 05:16:40,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:40,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 05:16:40,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:16:40,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 05:16:40,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:40,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:40,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:40,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:40,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:40,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:40,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:16:40,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:40,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:40,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:40,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:40,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:16:40,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459670189] [2020-10-13 05:16:40,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:40,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 05:16:40,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136300564] [2020-10-13 05:16:40,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 05:16:40,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:40,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 05:16:40,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 05:16:40,279 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 13 states. [2020-10-13 05:16:40,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:40,554 INFO L93 Difference]: Finished difference Result 113 states and 125 transitions. [2020-10-13 05:16:40,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:16:40,555 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-13 05:16:40,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:40,556 INFO L225 Difference]: With dead ends: 113 [2020-10-13 05:16:40,556 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 05:16:40,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:16:40,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 05:16:40,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 49. [2020-10-13 05:16:40,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 05:16:40,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-13 05:16:40,571 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 41 [2020-10-13 05:16:40,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:40,571 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-13 05:16:40,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 05:16:40,572 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-13 05:16:40,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 05:16:40,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:40,575 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:40,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:16:40,576 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:40,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:40,576 INFO L82 PathProgramCache]: Analyzing trace with hash -412934931, now seen corresponding path program 10 times [2020-10-13 05:16:40,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:40,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357625596] [2020-10-13 05:16:40,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:40,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:40,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:40,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:43,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:43,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 05:16:43,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:16:43,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2735 [2020-10-13 05:16:43,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:43,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:16:43,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:16:43,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 05:16:43,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 05:16:43,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:43,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:43,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:43,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:43,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:43,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:16:43,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:43,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:43,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:43,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:43,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:43,555 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:16:43,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357625596] [2020-10-13 05:16:43,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:43,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:16:43,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957384440] [2020-10-13 05:16:43,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:16:43,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:43,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:16:43,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:16:43,558 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 14 states. [2020-10-13 05:16:43,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:43,829 INFO L93 Difference]: Finished difference Result 121 states and 134 transitions. [2020-10-13 05:16:43,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 05:16:43,829 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2020-10-13 05:16:43,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:43,831 INFO L225 Difference]: With dead ends: 121 [2020-10-13 05:16:43,831 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 05:16:43,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:16:43,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 05:16:43,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 52. [2020-10-13 05:16:43,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 05:16:43,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-13 05:16:43,838 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 44 [2020-10-13 05:16:43,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:43,839 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-13 05:16:43,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:16:43,839 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-13 05:16:43,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 05:16:43,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:43,840 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:43,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:16:43,840 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:43,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:43,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1844520280, now seen corresponding path program 11 times [2020-10-13 05:16:43,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:43,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072325498] [2020-10-13 05:16:43,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:43,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:44,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:46,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:46,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 05:16:46,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:16:46,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3017 [2020-10-13 05:16:46,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:46,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 05:16:46,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:16:46,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 05:16:46,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:16:47,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:47,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:47,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:47,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:47,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:47,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:47,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:16:47,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:47,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:47,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:47,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:47,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:47,041 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:16:47,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072325498] [2020-10-13 05:16:47,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:47,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 05:16:47,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002328652] [2020-10-13 05:16:47,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 05:16:47,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:47,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 05:16:47,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 05:16:47,043 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 15 states. [2020-10-13 05:16:47,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:47,306 INFO L93 Difference]: Finished difference Result 129 states and 143 transitions. [2020-10-13 05:16:47,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:16:47,306 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-10-13 05:16:47,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:47,308 INFO L225 Difference]: With dead ends: 129 [2020-10-13 05:16:47,308 INFO L226 Difference]: Without dead ends: 117 [2020-10-13 05:16:47,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:16:47,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-13 05:16:47,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 55. [2020-10-13 05:16:47,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 05:16:47,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-13 05:16:47,315 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 47 [2020-10-13 05:16:47,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:47,315 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-13 05:16:47,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 05:16:47,316 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-13 05:16:47,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 05:16:47,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:47,316 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:47,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:16:47,317 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:47,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:47,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1178403059, now seen corresponding path program 12 times [2020-10-13 05:16:47,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:47,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909772551] [2020-10-13 05:16:47,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:47,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:47,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:47,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:50,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:50,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 05:16:50,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:16:50,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3363 [2020-10-13 05:16:50,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:50,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:16:50,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:16:50,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 05:16:50,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:50,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:50,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:50,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:50,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:50,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:50,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:16:50,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:50,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:50,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:50,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:50,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:50,863 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:16:50,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909772551] [2020-10-13 05:16:50,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:50,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:16:50,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117610934] [2020-10-13 05:16:50,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:16:50,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:50,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:16:50,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:16:50,865 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 16 states. [2020-10-13 05:16:51,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:51,217 INFO L93 Difference]: Finished difference Result 137 states and 152 transitions. [2020-10-13 05:16:51,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:16:51,218 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-10-13 05:16:51,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:51,219 INFO L225 Difference]: With dead ends: 137 [2020-10-13 05:16:51,219 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 05:16:51,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:16:51,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 05:16:51,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 58. [2020-10-13 05:16:51,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 05:16:51,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-10-13 05:16:51,228 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 50 [2020-10-13 05:16:51,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:51,229 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-10-13 05:16:51,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:16:51,229 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-10-13 05:16:51,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 05:16:51,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:51,230 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:51,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:16:51,230 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:51,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:51,230 INFO L82 PathProgramCache]: Analyzing trace with hash 370820232, now seen corresponding path program 13 times [2020-10-13 05:16:51,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:51,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487072964] [2020-10-13 05:16:51,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:51,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:51,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:54,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:54,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 05:16:54,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:16:54,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3696 [2020-10-13 05:16:54,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:54,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 05:16:54,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:16:54,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 05:16:54,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:55,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:55,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:55,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:55,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:55,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:55,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:16:55,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:55,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:55,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:55,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:55,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:55,131 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:16:55,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487072964] [2020-10-13 05:16:55,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:55,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 05:16:55,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057094639] [2020-10-13 05:16:55,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 05:16:55,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:55,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 05:16:55,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:16:55,133 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 17 states. [2020-10-13 05:16:55,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:55,505 INFO L93 Difference]: Finished difference Result 145 states and 161 transitions. [2020-10-13 05:16:55,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:16:55,506 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2020-10-13 05:16:55,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:55,508 INFO L225 Difference]: With dead ends: 145 [2020-10-13 05:16:55,508 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 05:16:55,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:16:55,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 05:16:55,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 61. [2020-10-13 05:16:55,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 05:16:55,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-13 05:16:55,516 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 53 [2020-10-13 05:16:55,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:55,516 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-13 05:16:55,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 05:16:55,516 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-13 05:16:55,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 05:16:55,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:55,517 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:55,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:16:55,517 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:55,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:55,517 INFO L82 PathProgramCache]: Analyzing trace with hash -436680403, now seen corresponding path program 14 times [2020-10-13 05:16:55,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:55,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975140126] [2020-10-13 05:16:55,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:55,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:55,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:59,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:59,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 05:16:59,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:16:59,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3664 [2020-10-13 05:16:59,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:59,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:16:59,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:16:59,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 05:16:59,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:59,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:16:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:59,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:16:59,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:16:59,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:16:59,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:16:59,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:16:59,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:16:59,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:16:59,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:16:59,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:16:59,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:16:59,397 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:16:59,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975140126] [2020-10-13 05:16:59,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:16:59,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:16:59,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779213032] [2020-10-13 05:16:59,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:16:59,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:16:59,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:16:59,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:16:59,400 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 18 states. [2020-10-13 05:16:59,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:16:59,748 INFO L93 Difference]: Finished difference Result 153 states and 170 transitions. [2020-10-13 05:16:59,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:16:59,749 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 56 [2020-10-13 05:16:59,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:16:59,750 INFO L225 Difference]: With dead ends: 153 [2020-10-13 05:16:59,750 INFO L226 Difference]: Without dead ends: 141 [2020-10-13 05:16:59,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:16:59,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-13 05:16:59,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 64. [2020-10-13 05:16:59,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 05:16:59,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-10-13 05:16:59,768 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 56 [2020-10-13 05:16:59,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:16:59,768 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-10-13 05:16:59,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:16:59,769 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-10-13 05:16:59,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 05:16:59,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:16:59,771 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:16:59,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:16:59,772 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:16:59,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:16:59,772 INFO L82 PathProgramCache]: Analyzing trace with hash -576272792, now seen corresponding path program 15 times [2020-10-13 05:16:59,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:16:59,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137610349] [2020-10-13 05:16:59,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:16:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:16:59,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:00,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:04,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:04,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 05:17:04,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:17:04,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4258 [2020-10-13 05:17:04,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:04,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 05:17:04,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:17:04,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 05:17:04,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:04,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:04,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:04,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:04,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:04,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:04,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:04,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:17:04,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:04,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:04,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:04,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:04,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:17:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:17:04,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137610349] [2020-10-13 05:17:04,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:04,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 05:17:04,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492442652] [2020-10-13 05:17:04,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 05:17:04,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:04,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 05:17:04,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 05:17:04,336 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 19 states. [2020-10-13 05:17:04,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:04,820 INFO L93 Difference]: Finished difference Result 161 states and 179 transitions. [2020-10-13 05:17:04,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:17:04,821 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 59 [2020-10-13 05:17:04,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:04,822 INFO L225 Difference]: With dead ends: 161 [2020-10-13 05:17:04,822 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 05:17:04,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:17:04,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 05:17:04,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 67. [2020-10-13 05:17:04,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 05:17:04,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-13 05:17:04,834 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 59 [2020-10-13 05:17:04,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:04,835 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-13 05:17:04,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 05:17:04,835 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-13 05:17:04,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 05:17:04,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:04,837 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:04,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:17:04,838 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:04,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:04,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1644790963, now seen corresponding path program 16 times [2020-10-13 05:17:04,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:04,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129407045] [2020-10-13 05:17:04,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:04,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:05,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:09,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:09,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 05:17:09,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:17:09,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4819 [2020-10-13 05:17:09,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:09,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:17:09,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:17:09,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 05:17:09,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:09,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:09,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:09,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:09,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:09,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:09,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:17:09,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:09,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:09,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:09,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:09,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:17:09,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129407045] [2020-10-13 05:17:09,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:09,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:17:09,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975424766] [2020-10-13 05:17:09,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:17:09,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:09,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:17:09,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:17:09,939 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 20 states. [2020-10-13 05:17:10,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:10,385 INFO L93 Difference]: Finished difference Result 169 states and 188 transitions. [2020-10-13 05:17:10,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 05:17:10,385 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2020-10-13 05:17:10,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:10,387 INFO L225 Difference]: With dead ends: 169 [2020-10-13 05:17:10,387 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 05:17:10,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=227, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:17:10,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 05:17:10,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 70. [2020-10-13 05:17:10,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 05:17:10,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-10-13 05:17:10,403 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 62 [2020-10-13 05:17:10,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:10,403 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-10-13 05:17:10,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 05:17:10,403 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-10-13 05:17:10,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 05:17:10,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:10,406 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:10,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:17:10,407 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:10,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:10,407 INFO L82 PathProgramCache]: Analyzing trace with hash 427974728, now seen corresponding path program 17 times [2020-10-13 05:17:10,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:10,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626851520] [2020-10-13 05:17:10,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:10,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:10,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:15,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:15,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 05:17:15,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:17:15,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:17:15,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:15,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 05:17:15,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:17:15,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-13 05:17:15,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:15,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:15,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:15,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:15,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:15,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:15,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:15,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:17:15,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:15,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:15,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:15,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:15,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:15,673 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:17:15,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626851520] [2020-10-13 05:17:15,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:15,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 05:17:15,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199751134] [2020-10-13 05:17:15,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 05:17:15,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:15,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 05:17:15,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 05:17:15,676 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 21 states. [2020-10-13 05:17:16,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:16,165 INFO L93 Difference]: Finished difference Result 177 states and 197 transitions. [2020-10-13 05:17:16,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:17:16,165 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-10-13 05:17:16,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:16,167 INFO L225 Difference]: With dead ends: 177 [2020-10-13 05:17:16,167 INFO L226 Difference]: Without dead ends: 165 [2020-10-13 05:17:16,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=249, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:17:16,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-13 05:17:16,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 73. [2020-10-13 05:17:16,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 05:17:16,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-10-13 05:17:16,174 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 65 [2020-10-13 05:17:16,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:16,175 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-10-13 05:17:16,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 05:17:16,175 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-10-13 05:17:16,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 05:17:16,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:16,176 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:16,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:17:16,176 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:16,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:16,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1445860717, now seen corresponding path program 18 times [2020-10-13 05:17:16,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:16,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539030840] [2020-10-13 05:17:16,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:16,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:16,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:17,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:21,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:21,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 05:17:21,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:17:21,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 05:17:21,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:21,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:17:21,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:17:21,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 05:17:21,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:17:21,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:21,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:21,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:21,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:21,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:21,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:17:21,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:21,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:21,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:21,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:21,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:17:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:17:21,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539030840] [2020-10-13 05:17:21,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:21,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:17:21,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200148244] [2020-10-13 05:17:21,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:17:21,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:21,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:17:21,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:17:21,564 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 22 states. [2020-10-13 05:17:22,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:22,097 INFO L93 Difference]: Finished difference Result 185 states and 206 transitions. [2020-10-13 05:17:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 05:17:22,098 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2020-10-13 05:17:22,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:22,100 INFO L225 Difference]: With dead ends: 185 [2020-10-13 05:17:22,100 INFO L226 Difference]: Without dead ends: 173 [2020-10-13 05:17:22,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=234, Invalid=272, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:17:22,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-13 05:17:22,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 76. [2020-10-13 05:17:22,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 05:17:22,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-10-13 05:17:22,113 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 68 [2020-10-13 05:17:22,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:22,113 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-10-13 05:17:22,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:17:22,113 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-10-13 05:17:22,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 05:17:22,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:22,114 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:22,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 05:17:22,114 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:22,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:22,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1476718040, now seen corresponding path program 19 times [2020-10-13 05:17:22,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:22,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218336822] [2020-10-13 05:17:22,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:22,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:22,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:22,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:27,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:27,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 05:17:27,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:17:27,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 05:17:27,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:27,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 05:17:27,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:17:27,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 05:17:27,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:27,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:27,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:27,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:27,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:27,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:27,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:17:27,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:27,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:27,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:27,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:27,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:17:27,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218336822] [2020-10-13 05:17:27,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:27,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 05:17:27,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795252307] [2020-10-13 05:17:27,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 05:17:27,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:27,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 05:17:27,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:17:27,440 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 23 states. [2020-10-13 05:17:27,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:27,906 INFO L93 Difference]: Finished difference Result 193 states and 215 transitions. [2020-10-13 05:17:27,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 05:17:27,906 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 71 [2020-10-13 05:17:27,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:27,908 INFO L225 Difference]: With dead ends: 193 [2020-10-13 05:17:27,908 INFO L226 Difference]: Without dead ends: 181 [2020-10-13 05:17:27,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:17:27,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-13 05:17:27,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 79. [2020-10-13 05:17:27,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 05:17:27,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-10-13 05:17:27,915 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 71 [2020-10-13 05:17:27,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:27,915 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-10-13 05:17:27,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 05:17:27,916 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-10-13 05:17:27,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 05:17:27,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:27,916 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:27,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 05:17:27,917 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:27,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:27,917 INFO L82 PathProgramCache]: Analyzing trace with hash -443443315, now seen corresponding path program 20 times [2020-10-13 05:17:27,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:27,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667313249] [2020-10-13 05:17:27,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:27,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:28,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:32,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:32,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 05:17:32,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:17:32,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:17:32,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:32,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 05:17:32,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:17:32,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 05:17:32,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:33,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:33,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:33,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:33,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:33,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:33,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:17:33,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:33,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:33,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:33,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:33,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:17:33,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667313249] [2020-10-13 05:17:33,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:33,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 05:17:33,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575602486] [2020-10-13 05:17:33,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 05:17:33,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:33,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 05:17:33,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:17:33,256 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 24 states. [2020-10-13 05:17:33,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:33,865 INFO L93 Difference]: Finished difference Result 201 states and 224 transitions. [2020-10-13 05:17:33,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:17:33,865 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 74 [2020-10-13 05:17:33,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:33,868 INFO L225 Difference]: With dead ends: 201 [2020-10-13 05:17:33,868 INFO L226 Difference]: Without dead ends: 189 [2020-10-13 05:17:33,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=279, Invalid=321, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:17:33,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-13 05:17:33,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 82. [2020-10-13 05:17:33,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 05:17:33,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-10-13 05:17:33,876 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 74 [2020-10-13 05:17:33,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:33,877 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-10-13 05:17:33,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 05:17:33,877 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-10-13 05:17:33,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 05:17:33,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:33,878 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:33,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 05:17:33,878 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:33,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:33,878 INFO L82 PathProgramCache]: Analyzing trace with hash -186721272, now seen corresponding path program 21 times [2020-10-13 05:17:33,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:33,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734373343] [2020-10-13 05:17:33,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:33,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:33,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:35,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:38,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:38,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 05:17:38,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:17:38,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:17:38,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:38,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 05:17:38,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:17:38,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 05:17:38,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:39,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:39,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:39,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:39,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:39,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:39,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:39,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:17:39,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:39,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:39,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:39,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:39,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:39,242 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:17:39,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734373343] [2020-10-13 05:17:39,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:39,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 05:17:39,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758029445] [2020-10-13 05:17:39,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 05:17:39,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:39,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 05:17:39,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:17:39,245 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 25 states. [2020-10-13 05:17:39,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:39,840 INFO L93 Difference]: Finished difference Result 209 states and 233 transitions. [2020-10-13 05:17:39,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 05:17:39,841 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 77 [2020-10-13 05:17:39,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:39,843 INFO L225 Difference]: With dead ends: 209 [2020-10-13 05:17:39,843 INFO L226 Difference]: Without dead ends: 197 [2020-10-13 05:17:39,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:17:39,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-13 05:17:39,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 85. [2020-10-13 05:17:39,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 05:17:39,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-10-13 05:17:39,850 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 77 [2020-10-13 05:17:39,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:39,851 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-10-13 05:17:39,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 05:17:39,851 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-10-13 05:17:39,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 05:17:39,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:39,851 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:39,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 05:17:39,852 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:39,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:39,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1517092435, now seen corresponding path program 22 times [2020-10-13 05:17:39,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:39,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964981232] [2020-10-13 05:17:39,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:39,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:39,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:40,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:44,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:44,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 05:17:44,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:17:44,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:17:44,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:44,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 05:17:44,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:17:44,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 05:17:44,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:45,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:45,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:45,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:45,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:45,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:45,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:17:45,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:45,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:45,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:45,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:45,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:17:45,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964981232] [2020-10-13 05:17:45,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:45,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 05:17:45,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825370036] [2020-10-13 05:17:45,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 05:17:45,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:45,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 05:17:45,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:17:45,239 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2020-10-13 05:17:45,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:45,769 INFO L93 Difference]: Finished difference Result 217 states and 242 transitions. [2020-10-13 05:17:45,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 05:17:45,770 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 80 [2020-10-13 05:17:45,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:45,772 INFO L225 Difference]: With dead ends: 217 [2020-10-13 05:17:45,772 INFO L226 Difference]: Without dead ends: 205 [2020-10-13 05:17:45,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:17:45,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-13 05:17:45,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 88. [2020-10-13 05:17:45,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 05:17:45,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-10-13 05:17:45,786 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 80 [2020-10-13 05:17:45,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:45,789 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-10-13 05:17:45,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 05:17:45,790 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-10-13 05:17:45,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 05:17:45,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:45,793 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:45,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 05:17:45,794 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:45,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:45,794 INFO L82 PathProgramCache]: Analyzing trace with hash -646201880, now seen corresponding path program 23 times [2020-10-13 05:17:45,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:45,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494092727] [2020-10-13 05:17:45,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:45,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:46,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:50,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:50,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 05:17:50,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:17:50,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 05:17:50,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:50,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 05:17:50,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:17:50,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 05:17:50,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:51,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:51,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:51,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:51,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:51,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:51,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:17:51,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:51,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:51,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:51,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:51,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:51,236 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:17:51,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494092727] [2020-10-13 05:17:51,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:51,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 05:17:51,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914819942] [2020-10-13 05:17:51,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 05:17:51,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:51,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 05:17:51,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 05:17:51,243 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 27 states. [2020-10-13 05:17:51,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:51,834 INFO L93 Difference]: Finished difference Result 225 states and 251 transitions. [2020-10-13 05:17:51,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 05:17:51,835 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 83 [2020-10-13 05:17:51,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:51,837 INFO L225 Difference]: With dead ends: 225 [2020-10-13 05:17:51,838 INFO L226 Difference]: Without dead ends: 213 [2020-10-13 05:17:51,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=354, Invalid=402, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:17:51,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-13 05:17:51,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 91. [2020-10-13 05:17:51,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 05:17:51,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-10-13 05:17:51,845 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 83 [2020-10-13 05:17:51,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:51,845 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-10-13 05:17:51,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 05:17:51,845 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-10-13 05:17:51,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 05:17:51,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:51,846 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:51,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 05:17:51,847 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:51,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:51,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1843113011, now seen corresponding path program 24 times [2020-10-13 05:17:51,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:51,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570760528] [2020-10-13 05:17:51,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:51,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:51,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:52,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:56,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:56,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 05:17:56,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:17:56,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 05:17:56,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:56,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 05:17:56,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:17:56,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 05:17:56,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:57,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:17:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:57,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:17:57,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:17:57,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:17:57,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:17:57,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:17:57,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:17:57,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:17:57,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:17:57,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:17:57,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:17:57,307 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:17:57,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570760528] [2020-10-13 05:17:57,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:17:57,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 05:17:57,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457162503] [2020-10-13 05:17:57,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 05:17:57,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:17:57,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 05:17:57,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 05:17:57,309 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 28 states. [2020-10-13 05:17:58,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:17:58,050 INFO L93 Difference]: Finished difference Result 233 states and 260 transitions. [2020-10-13 05:17:58,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 05:17:58,050 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 86 [2020-10-13 05:17:58,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:17:58,053 INFO L225 Difference]: With dead ends: 233 [2020-10-13 05:17:58,053 INFO L226 Difference]: Without dead ends: 221 [2020-10-13 05:17:58,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=381, Invalid=431, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:17:58,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-13 05:17:58,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 94. [2020-10-13 05:17:58,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 05:17:58,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-10-13 05:17:58,060 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 86 [2020-10-13 05:17:58,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:17:58,060 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-10-13 05:17:58,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 05:17:58,060 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-10-13 05:17:58,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 05:17:58,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:17:58,062 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:17:58,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 05:17:58,062 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:17:58,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:17:58,062 INFO L82 PathProgramCache]: Analyzing trace with hash 2090842056, now seen corresponding path program 25 times [2020-10-13 05:17:58,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:17:58,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836010113] [2020-10-13 05:17:58,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:17:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:17:58,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:02,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:03,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:03,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 05:18:03,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:18:03,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 05:18:03,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:03,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 05:18:03,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:18:03,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 05:18:03,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:03,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:03,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:03,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:03,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:03,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:03,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:03,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:18:03,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:03,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:03,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:03,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:03,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:18:03,541 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:18:03,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836010113] [2020-10-13 05:18:03,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:03,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 05:18:03,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665409820] [2020-10-13 05:18:03,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 05:18:03,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:03,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 05:18:03,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:18:03,544 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 29 states. [2020-10-13 05:18:04,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:04,192 INFO L93 Difference]: Finished difference Result 241 states and 269 transitions. [2020-10-13 05:18:04,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 05:18:04,193 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 89 [2020-10-13 05:18:04,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:04,195 INFO L225 Difference]: With dead ends: 241 [2020-10-13 05:18:04,195 INFO L226 Difference]: Without dead ends: 229 [2020-10-13 05:18:04,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=409, Invalid=461, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:18:04,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-13 05:18:04,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 97. [2020-10-13 05:18:04,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 05:18:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-10-13 05:18:04,202 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 89 [2020-10-13 05:18:04,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:04,203 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-10-13 05:18:04,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 05:18:04,203 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-10-13 05:18:04,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 05:18:04,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:04,204 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:04,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 05:18:04,204 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:04,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:04,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1773637101, now seen corresponding path program 26 times [2020-10-13 05:18:04,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:04,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001919335] [2020-10-13 05:18:04,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:04,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:05,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:09,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:09,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 05:18:09,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:18:09,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 05:18:09,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:09,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 05:18:09,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:18:09,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 05:18:09,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:09,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:09,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:09,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:09,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:09,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:09,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:18:09,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:09,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:09,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:09,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:09,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:09,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:18:09,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001919335] [2020-10-13 05:18:09,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:09,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 05:18:09,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525775726] [2020-10-13 05:18:09,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 05:18:09,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:09,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 05:18:09,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:18:09,706 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 30 states. [2020-10-13 05:18:10,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:10,362 INFO L93 Difference]: Finished difference Result 249 states and 278 transitions. [2020-10-13 05:18:10,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:18:10,363 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 92 [2020-10-13 05:18:10,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:10,365 INFO L225 Difference]: With dead ends: 249 [2020-10-13 05:18:10,365 INFO L226 Difference]: Without dead ends: 237 [2020-10-13 05:18:10,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=438, Invalid=492, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:18:10,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-13 05:18:10,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 100. [2020-10-13 05:18:10,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 05:18:10,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2020-10-13 05:18:10,372 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 92 [2020-10-13 05:18:10,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:10,373 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2020-10-13 05:18:10,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 05:18:10,373 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2020-10-13 05:18:10,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 05:18:10,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:10,374 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:10,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 05:18:10,374 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:10,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:10,375 INFO L82 PathProgramCache]: Analyzing trace with hash 848873896, now seen corresponding path program 27 times [2020-10-13 05:18:10,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:10,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601007541] [2020-10-13 05:18:10,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:10,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:10,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:11,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:15,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:15,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 05:18:15,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:18:15,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:18:15,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:15,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 05:18:15,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:18:15,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-13 05:18:15,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:15,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:15,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:15,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:15,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:15,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:15,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:18:15,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:15,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:15,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:15,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:15,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:18:15,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601007541] [2020-10-13 05:18:15,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:15,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 05:18:15,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551295605] [2020-10-13 05:18:15,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 05:18:15,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:15,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 05:18:15,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:18:15,910 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 31 states. [2020-10-13 05:18:16,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:16,576 INFO L93 Difference]: Finished difference Result 257 states and 287 transitions. [2020-10-13 05:18:16,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 05:18:16,577 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 95 [2020-10-13 05:18:16,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:16,578 INFO L225 Difference]: With dead ends: 257 [2020-10-13 05:18:16,578 INFO L226 Difference]: Without dead ends: 245 [2020-10-13 05:18:16,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=468, Invalid=524, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:18:16,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-13 05:18:16,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 103. [2020-10-13 05:18:16,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 05:18:16,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2020-10-13 05:18:16,589 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 95 [2020-10-13 05:18:16,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:16,589 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2020-10-13 05:18:16,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 05:18:16,589 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2020-10-13 05:18:16,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 05:18:16,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:16,590 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:16,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 05:18:16,591 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:16,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:16,591 INFO L82 PathProgramCache]: Analyzing trace with hash -851529715, now seen corresponding path program 28 times [2020-10-13 05:18:16,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:16,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698175329] [2020-10-13 05:18:16,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:16,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:16,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:17,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:21,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:21,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 05:18:21,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:18:21,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 05:18:21,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:21,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 05:18:21,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:18:21,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 05:18:21,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:22,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:22,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:22,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:22,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:22,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:22,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:18:22,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:22,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:22,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:22,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:22,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:22,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:18:22,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698175329] [2020-10-13 05:18:22,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:22,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 05:18:22,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021850198] [2020-10-13 05:18:22,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 05:18:22,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:22,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 05:18:22,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 05:18:22,158 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 32 states. [2020-10-13 05:18:22,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:22,929 INFO L93 Difference]: Finished difference Result 265 states and 296 transitions. [2020-10-13 05:18:22,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 05:18:22,929 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 98 [2020-10-13 05:18:22,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:22,931 INFO L225 Difference]: With dead ends: 265 [2020-10-13 05:18:22,931 INFO L226 Difference]: Without dead ends: 253 [2020-10-13 05:18:22,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=499, Invalid=557, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:18:22,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-13 05:18:22,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 106. [2020-10-13 05:18:22,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 05:18:22,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2020-10-13 05:18:22,953 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 98 [2020-10-13 05:18:22,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:22,953 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2020-10-13 05:18:22,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 05:18:22,953 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2020-10-13 05:18:22,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 05:18:22,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:22,954 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:22,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 05:18:22,955 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:22,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:22,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1563751304, now seen corresponding path program 29 times [2020-10-13 05:18:22,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:22,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868682289] [2020-10-13 05:18:22,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:23,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:24,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:31,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:31,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 05:18:31,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:18:31,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8536 [2020-10-13 05:18:31,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:31,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 05:18:31,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:18:31,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-13 05:18:31,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:32,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:32,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:32,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:32,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:32,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:32,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:18:32,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:32,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:32,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:32,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:32,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:18:32,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868682289] [2020-10-13 05:18:32,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:32,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 05:18:32,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462846676] [2020-10-13 05:18:32,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 05:18:32,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:32,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 05:18:32,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:18:32,091 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 33 states. [2020-10-13 05:18:33,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:33,023 INFO L93 Difference]: Finished difference Result 273 states and 305 transitions. [2020-10-13 05:18:33,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 05:18:33,023 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 101 [2020-10-13 05:18:33,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:33,027 INFO L225 Difference]: With dead ends: 273 [2020-10-13 05:18:33,027 INFO L226 Difference]: Without dead ends: 261 [2020-10-13 05:18:33,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=531, Invalid=591, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:18:33,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-13 05:18:33,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 109. [2020-10-13 05:18:33,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 05:18:33,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2020-10-13 05:18:33,037 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 101 [2020-10-13 05:18:33,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:33,038 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2020-10-13 05:18:33,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 05:18:33,038 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2020-10-13 05:18:33,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 05:18:33,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:33,039 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:33,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 05:18:33,040 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:33,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:33,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1613478445, now seen corresponding path program 30 times [2020-10-13 05:18:33,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:33,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064741668] [2020-10-13 05:18:33,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:33,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:34,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:42,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:42,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 05:18:42,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:18:42,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9002 [2020-10-13 05:18:42,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:42,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 05:18:42,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:18:42,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-13 05:18:42,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:42,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:42,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:42,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:42,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:42,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:42,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:42,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:18:42,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:42,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:42,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:42,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:42,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:42,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:18:42,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064741668] [2020-10-13 05:18:42,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:42,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 05:18:42,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260552386] [2020-10-13 05:18:42,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 05:18:42,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:42,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 05:18:42,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 05:18:42,676 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 34 states. [2020-10-13 05:18:43,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:43,638 INFO L93 Difference]: Finished difference Result 281 states and 314 transitions. [2020-10-13 05:18:43,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 05:18:43,638 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 104 [2020-10-13 05:18:43,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:43,641 INFO L225 Difference]: With dead ends: 281 [2020-10-13 05:18:43,641 INFO L226 Difference]: Without dead ends: 269 [2020-10-13 05:18:43,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=564, Invalid=626, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:18:43,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-13 05:18:43,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 112. [2020-10-13 05:18:43,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 05:18:43,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2020-10-13 05:18:43,651 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 104 [2020-10-13 05:18:43,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:43,651 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2020-10-13 05:18:43,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 05:18:43,652 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2020-10-13 05:18:43,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 05:18:43,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:43,653 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:43,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 05:18:43,653 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:43,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:43,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1271018856, now seen corresponding path program 31 times [2020-10-13 05:18:43,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:43,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073912528] [2020-10-13 05:18:43,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:43,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:45,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:50,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:50,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 05:18:50,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:18:50,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6510 [2020-10-13 05:18:50,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:50,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 05:18:50,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:18:50,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-13 05:18:50,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:50,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:18:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:50,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:50,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:50,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:18:50,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:50,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:18:50,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:50,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:18:50,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:18:50,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:18:50,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:18:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:18:50,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073912528] [2020-10-13 05:18:50,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:18:50,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 05:18:50,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271966270] [2020-10-13 05:18:50,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 05:18:50,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:18:50,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 05:18:50,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:18:50,843 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 35 states. [2020-10-13 05:18:51,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:18:51,854 INFO L93 Difference]: Finished difference Result 289 states and 323 transitions. [2020-10-13 05:18:51,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 05:18:51,855 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 107 [2020-10-13 05:18:51,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:18:51,857 INFO L225 Difference]: With dead ends: 289 [2020-10-13 05:18:51,857 INFO L226 Difference]: Without dead ends: 277 [2020-10-13 05:18:51,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=598, Invalid=662, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:18:51,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-13 05:18:51,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 115. [2020-10-13 05:18:51,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 05:18:51,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2020-10-13 05:18:51,866 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 107 [2020-10-13 05:18:51,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:18:51,866 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2020-10-13 05:18:51,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 05:18:51,866 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2020-10-13 05:18:51,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 05:18:51,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:18:51,867 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:18:51,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 05:18:51,868 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:18:51,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:18:51,868 INFO L82 PathProgramCache]: Analyzing trace with hash -395269043, now seen corresponding path program 32 times [2020-10-13 05:18:51,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:18:51,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902738459] [2020-10-13 05:18:51,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:18:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:18:51,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:18:58,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:18:58,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 05:18:58,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:18:58,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6391 [2020-10-13 05:18:58,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:18:58,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 05:18:58,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:18:58,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-13 05:18:58,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:00,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:00,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:00,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:00,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:00,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:00,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:19:00,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:00,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:00,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:00,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:00,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:19:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-10-13 05:19:00,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902738459] [2020-10-13 05:19:00,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:00,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 05:19:00,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953496777] [2020-10-13 05:19:00,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 05:19:00,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:00,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 05:19:00,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:19:00,742 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 9 states. [2020-10-13 05:19:01,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:01,028 INFO L93 Difference]: Finished difference Result 126 states and 127 transitions. [2020-10-13 05:19:01,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:19:01,029 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 110 [2020-10-13 05:19:01,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:01,030 INFO L225 Difference]: With dead ends: 126 [2020-10-13 05:19:01,030 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 05:19:01,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:19:01,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 05:19:01,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-10-13 05:19:01,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 05:19:01,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2020-10-13 05:19:01,037 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 110 [2020-10-13 05:19:01,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:01,037 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2020-10-13 05:19:01,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 05:19:01,037 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2020-10-13 05:19:01,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 05:19:01,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:01,039 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:01,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 05:19:01,040 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:01,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:01,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1198917836, now seen corresponding path program 1 times [2020-10-13 05:19:01,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:01,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466812662] [2020-10-13 05:19:01,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:01,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:03,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:06,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:06,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 05:19:06,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:19:06,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-10-13 05:19:06,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:06,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 05:19:06,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:19:06,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-13 05:19:06,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:07,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:07,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:07,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:07,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:07,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:07,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:07,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:19:07,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:07,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:07,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:07,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:07,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:19:07,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-10-13 05:19:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:07,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:07,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:07,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:19:07,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:07,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:19:07,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:07,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:07,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:19:07,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:07,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1525 backedges. 2 proven. 1520 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 05:19:07,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466812662] [2020-10-13 05:19:07,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:07,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 05:19:07,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820240791] [2020-10-13 05:19:07,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 05:19:07,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:07,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 05:19:07,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 05:19:07,093 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand 36 states. [2020-10-13 05:19:08,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:08,152 INFO L93 Difference]: Finished difference Result 308 states and 342 transitions. [2020-10-13 05:19:08,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 05:19:08,153 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 119 [2020-10-13 05:19:08,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:08,155 INFO L225 Difference]: With dead ends: 308 [2020-10-13 05:19:08,155 INFO L226 Difference]: Without dead ends: 289 [2020-10-13 05:19:08,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=633, Invalid=699, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:19:08,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-13 05:19:08,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 125. [2020-10-13 05:19:08,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-13 05:19:08,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2020-10-13 05:19:08,165 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 119 [2020-10-13 05:19:08,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:08,166 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2020-10-13 05:19:08,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 05:19:08,166 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2020-10-13 05:19:08,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 05:19:08,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:08,167 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:08,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 05:19:08,168 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:08,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:08,168 INFO L82 PathProgramCache]: Analyzing trace with hash 257445937, now seen corresponding path program 2 times [2020-10-13 05:19:08,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:08,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277411324] [2020-10-13 05:19:08,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:08,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:10,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:18,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:18,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 05:19:18,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:19:18,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10736 [2020-10-13 05:19:18,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:18,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 05:19:18,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:19:18,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-13 05:19:18,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:19,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:19,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:19,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:19,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:19,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:19,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:19:19,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:19,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:19,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:19,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:19,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:19,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2020-10-13 05:19:19,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:19,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:19,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:19,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:19:19,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:19,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:19:19,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:19,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:19,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:19:19,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:19,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:19,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1622 backedges. 2 proven. 1617 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 05:19:19,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277411324] [2020-10-13 05:19:19,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:19,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 05:19:19,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004428480] [2020-10-13 05:19:19,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 05:19:19,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:19,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 05:19:19,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:19:19,643 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 37 states. [2020-10-13 05:19:20,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:19:20,707 INFO L93 Difference]: Finished difference Result 316 states and 351 transitions. [2020-10-13 05:19:20,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 05:19:20,708 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 122 [2020-10-13 05:19:20,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:19:20,710 INFO L225 Difference]: With dead ends: 316 [2020-10-13 05:19:20,711 INFO L226 Difference]: Without dead ends: 297 [2020-10-13 05:19:20,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=669, Invalid=737, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 05:19:20,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-13 05:19:20,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 128. [2020-10-13 05:19:20,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 05:19:20,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2020-10-13 05:19:20,725 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 122 [2020-10-13 05:19:20,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:19:20,725 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2020-10-13 05:19:20,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 05:19:20,726 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2020-10-13 05:19:20,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-13 05:19:20,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:19:20,727 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:19:20,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 05:19:20,727 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:19:20,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:19:20,728 INFO L82 PathProgramCache]: Analyzing trace with hash -995454292, now seen corresponding path program 3 times [2020-10-13 05:19:20,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:19:20,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556211830] [2020-10-13 05:19:20,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:19:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:20,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:25,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:25,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:25,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 05:19:25,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:19:25,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 05:19:25,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:25,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 05:19:25,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 05:19:25,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-13 05:19:25,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:26,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:19:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:26,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:26,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:26,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:19:26,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:26,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:19:26,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:26,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:26,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:19:26,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:26,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:26,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-10-13 05:19:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:19:26,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:19:26,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:19:26,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:19:26,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:19:26,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:19:26,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:19:26,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:19:26,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 05:19:26,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:19:26,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:19:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 2 proven. 1717 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 05:19:26,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556211830] [2020-10-13 05:19:26,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:19:26,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 05:19:26,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690297362] [2020-10-13 05:19:26,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 05:19:26,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:19:26,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 05:19:26,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 05:19:26,562 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand 38 states.