/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/loop-lit/gr2006.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:51:39,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:51:39,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:51:39,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:51:39,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:51:39,409 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:51:39,411 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:51:39,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:51:39,418 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:51:39,419 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:51:39,420 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:51:39,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:51:39,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:51:39,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:51:39,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:51:39,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:51:39,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:51:39,426 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:51:39,428 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:51:39,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:51:39,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:51:39,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:51:39,433 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:51:39,434 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:51:39,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:51:39,436 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:51:39,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:51:39,438 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:51:39,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:51:39,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:51:39,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:51:39,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:51:39,440 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:51:39,441 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:51:39,442 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:51:39,442 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:51:39,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:51:39,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:51:39,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:51:39,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:51:39,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:51:39,446 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 10:51:39,468 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:51:39,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:51:39,469 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:51:39,470 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:51:39,470 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:51:39,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:51:39,470 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:51:39,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:51:39,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:51:39,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:51:39,471 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:51:39,471 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:51:39,471 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:51:39,472 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:51:39,472 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:51:39,472 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:51:39,472 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:51:39,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:51:39,472 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:51:39,473 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:51:39,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:51:39,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:51:39,473 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:51:39,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:51:39,474 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:51:39,474 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:51:39,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:51:39,474 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:51:39,474 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:51:39,475 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 10:51:39,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:51:39,814 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:51:39,818 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:51:39,819 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:51:39,820 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:51:39,820 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gr2006.i [2020-10-13 10:51:39,877 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b88f22750/0701b8d7687c407bbc4570ab43e1b78a/FLAG3dcb8616d [2020-10-13 10:51:40,350 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:51:40,351 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gr2006.i [2020-10-13 10:51:40,358 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b88f22750/0701b8d7687c407bbc4570ab43e1b78a/FLAG3dcb8616d [2020-10-13 10:51:40,733 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b88f22750/0701b8d7687c407bbc4570ab43e1b78a [2020-10-13 10:51:40,743 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:51:40,744 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:51:40,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:51:40,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:51:40,750 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:51:40,751 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:51:40" (1/1) ... [2020-10-13 10:51:40,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61ac3c2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:40, skipping insertion in model container [2020-10-13 10:51:40,755 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:51:40" (1/1) ... [2020-10-13 10:51:40,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:51:40,781 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:51:40,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:51:40,993 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:51:41,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:51:41,036 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:51:41,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:41 WrapperNode [2020-10-13 10:51:41,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:51:41,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:51:41,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:51:41,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:51:41,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:41" (1/1) ... [2020-10-13 10:51:41,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:41" (1/1) ... [2020-10-13 10:51:41,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:41" (1/1) ... [2020-10-13 10:51:41,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:41" (1/1) ... [2020-10-13 10:51:41,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:41" (1/1) ... [2020-10-13 10:51:41,167 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:41" (1/1) ... [2020-10-13 10:51:41,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:41" (1/1) ... [2020-10-13 10:51:41,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:51:41,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:51:41,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:51:41,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:51:41,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:41" (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 10:51:41,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:51:41,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:51:41,233 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 10:51:41,233 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:51:41,233 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:51:41,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:51:41,233 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 10:51:41,234 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 10:51:41,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:51:41,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 10:51:41,234 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:51:41,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:51:41,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:51:41,427 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:51:41,427 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-13 10:51:41,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:51:41 BoogieIcfgContainer [2020-10-13 10:51:41,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:51:41,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:51:41,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:51:41,437 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:51:41,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:51:40" (1/3) ... [2020-10-13 10:51:41,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530b7faa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:51:41, skipping insertion in model container [2020-10-13 10:51:41,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:51:41" (2/3) ... [2020-10-13 10:51:41,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@530b7faa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:51:41, skipping insertion in model container [2020-10-13 10:51:41,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:51:41" (3/3) ... [2020-10-13 10:51:41,441 INFO L109 eAbstractionObserver]: Analyzing ICFG gr2006.i [2020-10-13 10:51:41,453 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:51:41,461 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:51:41,482 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:51:41,522 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:51:41,522 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:51:41,523 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:51:41,523 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:51:41,523 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:51:41,523 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:51:41,523 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:51:41,524 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:51:41,551 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-13 10:51:41,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-13 10:51:41,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:41,561 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:41,562 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:41,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:41,574 INFO L82 PathProgramCache]: Analyzing trace with hash -766562631, now seen corresponding path program 1 times [2020-10-13 10:51:41,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:41,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865222622] [2020-10-13 10:51:41,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:41,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:41,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:41,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-13 10:51:41,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:41,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-13 10:51:41,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:41,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:41,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:51:41,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:41,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:51:41,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:41,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:41,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:41,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:41,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:41,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:51:41,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:41,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:41,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:41,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:41,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:41,780 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 10:51:41,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865222622] [2020-10-13 10:51:41,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:41,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-13 10:51:41,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584010849] [2020-10-13 10:51:41,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-13 10:51:41,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:41,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-13 10:51:41,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 10:51:41,802 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-10-13 10:51:41,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:41,822 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-10-13 10:51:41,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-13 10:51:41,823 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-13 10:51:41,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:41,831 INFO L225 Difference]: With dead ends: 32 [2020-10-13 10:51:41,831 INFO L226 Difference]: Without dead ends: 13 [2020-10-13 10:51:41,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 10:51:41,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-13 10:51:41,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-13 10:51:41,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-13 10:51:41,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-10-13 10:51:41,874 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2020-10-13 10:51:41,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:41,874 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-13 10:51:41,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-13 10:51:41,875 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-10-13 10:51:41,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 10:51:41,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:41,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:41,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:51:41,877 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:41,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:41,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1746758926, now seen corresponding path program 1 times [2020-10-13 10:51:41,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:41,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829319256] [2020-10-13 10:51:41,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:41,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:41,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:41,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:41,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:51:41,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:41,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-13 10:51:41,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:41,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:51:41,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:41,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:51:41,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 10:51:42,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:42,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:42,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:42,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:42,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:42,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:51:42,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:42,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:42,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:42,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:42,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:42,081 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 10:51:42,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829319256] [2020-10-13 10:51:42,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:42,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:51:42,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348844827] [2020-10-13 10:51:42,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:51:42,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:42,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:51:42,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:51:42,092 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 4 states. [2020-10-13 10:51:42,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:42,157 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-10-13 10:51:42,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:51:42,158 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-13 10:51:42,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:42,159 INFO L225 Difference]: With dead ends: 22 [2020-10-13 10:51:42,160 INFO L226 Difference]: Without dead ends: 17 [2020-10-13 10:51:42,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:51:42,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-13 10:51:42,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-13 10:51:42,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-13 10:51:42,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-13 10:51:42,168 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2020-10-13 10:51:42,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:42,168 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-13 10:51:42,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:51:42,168 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-13 10:51:42,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-13 10:51:42,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:42,169 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:42,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:51:42,170 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:42,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:42,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1689500624, now seen corresponding path program 1 times [2020-10-13 10:51:42,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:42,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844908469] [2020-10-13 10:51:42,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:42,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:42,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:42,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:42,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 10:51:42,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:42,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 10:51:42,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:42,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:51:42,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:42,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:51:42,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:42,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:42,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:42,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:42,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:42,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:42,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:42,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 10:51:42,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:42,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:42,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:42,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:42,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:42,235 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 10:51:42,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844908469] [2020-10-13 10:51:42,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:51:42,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:51:42,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513765773] [2020-10-13 10:51:42,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:51:42,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:42,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:51:42,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:51:42,238 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2020-10-13 10:51:42,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:42,253 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-10-13 10:51:42,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:51:42,254 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-13 10:51:42,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:42,255 INFO L225 Difference]: With dead ends: 32 [2020-10-13 10:51:42,256 INFO L226 Difference]: Without dead ends: 20 [2020-10-13 10:51:42,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 10:51:42,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-13 10:51:42,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-10-13 10:51:42,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-13 10:51:42,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-10-13 10:51:42,262 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2020-10-13 10:51:42,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:42,263 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-10-13 10:51:42,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:51:42,263 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-10-13 10:51:42,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:51:42,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:42,264 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:42,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:51:42,265 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:42,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:42,265 INFO L82 PathProgramCache]: Analyzing trace with hash 2035029074, now seen corresponding path program 1 times [2020-10-13 10:51:42,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:42,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887715764] [2020-10-13 10:51:42,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:42,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:42,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:42,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:42,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:51:42,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:51:42,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-13 10:51:42,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:42,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:51:42,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:42,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:51:42,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:42,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:42,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:42,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:42,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:42,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:42,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:42,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:42,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:42,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:42,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:42,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:51:42,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887715764] [2020-10-13 10:51:42,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:42,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:51:42,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851252908] [2020-10-13 10:51:42,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:51:42,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:42,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:51:42,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:51:42,475 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2020-10-13 10:51:42,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:42,501 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-10-13 10:51:42,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:51:42,502 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-13 10:51:42,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:42,504 INFO L225 Difference]: With dead ends: 35 [2020-10-13 10:51:42,504 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 10:51:42,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:51:42,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 10:51:42,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-10-13 10:51:42,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 10:51:42,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-13 10:51:42,511 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 18 [2020-10-13 10:51:42,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:42,512 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-13 10:51:42,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:51:42,512 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-13 10:51:42,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 10:51:42,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:42,513 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:42,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:51:42,514 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:42,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:42,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1414473549, now seen corresponding path program 2 times [2020-10-13 10:51:42,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:42,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269965418] [2020-10-13 10:51:42,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:42,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:42,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:42,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:42,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:42,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:51:42,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:51:42,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 268 [2020-10-13 10:51:42,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:42,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:51:42,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:42,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:51:42,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:42,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:42,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:42,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:42,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:42,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:42,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:42,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:42,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:42,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:42,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:42,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:51:42,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269965418] [2020-10-13 10:51:42,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:42,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:51:42,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608124208] [2020-10-13 10:51:42,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:51:42,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:42,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:51:42,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:51:42,843 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2020-10-13 10:51:42,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:42,872 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-13 10:51:42,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:51:42,873 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-13 10:51:42,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:42,874 INFO L225 Difference]: With dead ends: 38 [2020-10-13 10:51:42,874 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 10:51:42,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:51:42,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 10:51:42,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-13 10:51:42,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 10:51:42,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-13 10:51:42,881 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-10-13 10:51:42,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:42,881 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-13 10:51:42,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:51:42,882 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-13 10:51:42,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:51:42,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:42,883 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:42,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:51:42,883 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:42,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:42,884 INFO L82 PathProgramCache]: Analyzing trace with hash -15929742, now seen corresponding path program 3 times [2020-10-13 10:51:42,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:42,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856952599] [2020-10-13 10:51:42,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:42,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:42,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:42,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:43,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:43,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:43,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:51:43,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:51:43,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-13 10:51:43,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:43,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:51:43,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:43,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:51:43,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:43,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:43,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:43,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:43,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:43,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:43,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:43,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:43,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:43,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:43,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:43,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:43,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:51:43,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856952599] [2020-10-13 10:51:43,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:43,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:51:43,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750310790] [2020-10-13 10:51:43,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:51:43,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:43,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:51:43,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:51:43,176 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2020-10-13 10:51:43,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:43,207 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-10-13 10:51:43,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:51:43,208 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-13 10:51:43,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:43,208 INFO L225 Difference]: With dead ends: 41 [2020-10-13 10:51:43,209 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 10:51:43,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:51:43,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 10:51:43,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-13 10:51:43,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 10:51:43,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-13 10:51:43,215 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 24 [2020-10-13 10:51:43,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:43,216 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-13 10:51:43,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:51:43,216 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-13 10:51:43,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 10:51:43,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:43,217 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:43,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:51:43,218 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:43,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:43,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1505138989, now seen corresponding path program 4 times [2020-10-13 10:51:43,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:43,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374045556] [2020-10-13 10:51:43,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:43,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:43,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:43,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:43,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:43,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:43,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:43,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 10:51:43,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:51:43,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 556 [2020-10-13 10:51:43,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:43,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:51:43,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:51:43,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:51:43,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:43,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:43,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:43,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:43,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:43,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:43,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:43,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:43,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:43,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:43,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:43,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:43,844 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 10:51:43,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374045556] [2020-10-13 10:51:43,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:43,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:51:43,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312305451] [2020-10-13 10:51:43,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:51:43,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:43,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:51:43,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:51:43,849 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 5 states. [2020-10-13 10:51:43,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:43,895 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-10-13 10:51:43,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:51:43,896 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-10-13 10:51:43,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:43,899 INFO L225 Difference]: With dead ends: 40 [2020-10-13 10:51:43,900 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 10:51:43,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:51:43,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 10:51:43,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-10-13 10:51:43,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 10:51:43,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-13 10:51:43,918 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 27 [2020-10-13 10:51:43,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:43,921 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-13 10:51:43,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:51:43,921 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-13 10:51:43,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:51:43,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:43,922 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:43,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:51:43,923 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:43,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:43,923 INFO L82 PathProgramCache]: Analyzing trace with hash -278070448, now seen corresponding path program 5 times [2020-10-13 10:51:43,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:43,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46800085] [2020-10-13 10:51:43,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:43,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:43,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:43,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:44,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:44,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:44,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:44,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:51:44,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:51:44,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 609 [2020-10-13 10:51:44,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:44,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:51:44,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:44,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:51:44,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:44,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:44,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:44,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:44,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:44,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:44,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:44,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:44,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:44,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:44,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:44,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 10:51:44,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46800085] [2020-10-13 10:51:44,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:44,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:51:44,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967454601] [2020-10-13 10:51:44,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:51:44,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:44,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:51:44,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:51:44,606 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 7 states. [2020-10-13 10:51:44,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:44,639 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-10-13 10:51:44,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:51:44,640 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-13 10:51:44,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:44,641 INFO L225 Difference]: With dead ends: 50 [2020-10-13 10:51:44,641 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 10:51:44,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:51:44,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 10:51:44,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-13 10:51:44,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 10:51:44,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-13 10:51:44,648 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 30 [2020-10-13 10:51:44,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:44,649 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-13 10:51:44,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:51:44,649 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-13 10:51:44,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:51:44,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:44,650 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:44,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:51:44,651 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:44,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:44,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1859939787, now seen corresponding path program 6 times [2020-10-13 10:51:44,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:44,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116892887] [2020-10-13 10:51:44,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:44,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:44,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:44,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:44,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:44,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:44,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:44,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:45,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:45,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:51:45,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:51:45,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1011 [2020-10-13 10:51:45,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:45,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:51:45,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:45,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:51:45,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:45,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:45,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:45,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:45,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:45,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:45,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:45,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:45,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:45,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:45,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:45,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:45,754 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 39 proven. 40 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 10:51:45,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116892887] [2020-10-13 10:51:45,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:45,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:51:45,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778283619] [2020-10-13 10:51:45,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:51:45,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:45,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:51:45,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:51:45,757 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 8 states. [2020-10-13 10:51:45,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:45,794 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2020-10-13 10:51:45,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:51:45,795 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-13 10:51:45,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:45,796 INFO L225 Difference]: With dead ends: 53 [2020-10-13 10:51:45,796 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 10:51:45,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:51:45,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 10:51:45,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-13 10:51:45,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 10:51:45,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-13 10:51:45,803 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 33 [2020-10-13 10:51:45,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:45,803 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-13 10:51:45,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:51:45,804 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-13 10:51:45,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:51:45,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:45,805 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:45,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:51:45,806 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:45,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:45,806 INFO L82 PathProgramCache]: Analyzing trace with hash 957850992, now seen corresponding path program 7 times [2020-10-13 10:51:45,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:45,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586641244] [2020-10-13 10:51:45,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:45,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:45,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:45,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:45,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:46,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:46,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:46,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:46,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:46,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:51:46,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 10:51:46,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1065 [2020-10-13 10:51:46,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:46,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:51:46,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 10:51:46,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 10:51:46,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:46,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:46,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:46,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:46,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:46,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:46,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:46,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:46,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:46,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:46,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:46,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 76 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 10:51:46,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586641244] [2020-10-13 10:51:46,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:46,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:51:46,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323391346] [2020-10-13 10:51:46,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:51:46,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:46,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:51:46,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:51:46,922 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 6 states. [2020-10-13 10:51:46,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:46,954 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-10-13 10:51:46,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:51:46,955 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-10-13 10:51:46,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:46,956 INFO L225 Difference]: With dead ends: 52 [2020-10-13 10:51:46,956 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 10:51:46,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:51:46,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 10:51:46,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-10-13 10:51:46,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 10:51:46,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-13 10:51:46,963 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 36 [2020-10-13 10:51:46,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:46,963 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-13 10:51:46,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:51:46,964 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-13 10:51:46,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:51:46,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:46,965 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:46,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:51:46,965 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:46,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:46,966 INFO L82 PathProgramCache]: Analyzing trace with hash -838933459, now seen corresponding path program 8 times [2020-10-13 10:51:46,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:46,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223306223] [2020-10-13 10:51:46,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:46,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:46,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:47,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:47,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:47,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:47,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:47,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:48,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:48,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 10:51:48,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 10:51:48,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1341 [2020-10-13 10:51:48,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:48,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:51:48,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:48,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 10:51:48,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:48,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:48,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:48,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:48,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:48,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:48,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:48,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:48,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:48,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:48,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:48,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 66 proven. 57 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 10:51:48,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223306223] [2020-10-13 10:51:48,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:48,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:51:48,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38763943] [2020-10-13 10:51:48,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:51:48,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:48,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:51:48,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:51:48,396 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 9 states. [2020-10-13 10:51:48,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:48,437 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2020-10-13 10:51:48,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:51:48,437 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-10-13 10:51:48,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:48,438 INFO L225 Difference]: With dead ends: 62 [2020-10-13 10:51:48,438 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 10:51:48,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:51:48,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 10:51:48,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-13 10:51:48,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 10:51:48,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-10-13 10:51:48,453 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 39 [2020-10-13 10:51:48,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:48,454 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-10-13 10:51:48,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:51:48,454 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-10-13 10:51:48,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 10:51:48,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:48,456 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:48,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:51:48,456 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:48,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:48,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1327041554, now seen corresponding path program 9 times [2020-10-13 10:51:48,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:48,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328466205] [2020-10-13 10:51:48,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:48,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:48,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:48,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:48,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:48,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:48,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:48,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:48,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:49,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:49,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 10:51:49,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 10:51:49,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1529 [2020-10-13 10:51:49,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:49,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:51:49,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:49,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 10:51:49,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:50,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:50,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:50,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:50,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:50,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:50,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:51:50,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:50,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:50,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:50,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:50,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 76 proven. 77 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 10:51:50,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328466205] [2020-10-13 10:51:50,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:50,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:51:50,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351410831] [2020-10-13 10:51:50,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:51:50,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:50,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:51:50,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:51:50,077 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 10 states. [2020-10-13 10:51:50,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:50,118 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-10-13 10:51:50,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:51:50,119 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-13 10:51:50,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:50,120 INFO L225 Difference]: With dead ends: 65 [2020-10-13 10:51:50,120 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 10:51:50,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:51:50,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 10:51:50,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-13 10:51:50,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 10:51:50,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-13 10:51:50,127 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 42 [2020-10-13 10:51:50,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:50,127 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-13 10:51:50,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:51:50,127 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-13 10:51:50,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 10:51:50,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:50,128 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:50,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:51:50,129 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:50,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:50,129 INFO L82 PathProgramCache]: Analyzing trace with hash 299998733, now seen corresponding path program 10 times [2020-10-13 10:51:50,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:50,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838504294] [2020-10-13 10:51:50,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:50,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:50,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:50,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:50,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:50,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:50,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:50,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:50,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:50,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:50,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:52,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:52,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 10:51:52,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 10:51:52,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1925 [2020-10-13 10:51:52,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:52,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:51:52,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 10:51:52,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 10:51:52,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:51:52,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:52,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:52,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:52,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:52,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:52,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:52,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:52,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:52,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:52,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:52,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 137 proven. 34 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 10:51:52,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838504294] [2020-10-13 10:51:52,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:52,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:51:52,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567855086] [2020-10-13 10:51:52,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:51:52,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:52,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:51:52,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:51:52,128 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 7 states. [2020-10-13 10:51:52,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:52,166 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-10-13 10:51:52,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:51:52,167 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-10-13 10:51:52,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:52,168 INFO L225 Difference]: With dead ends: 64 [2020-10-13 10:51:52,168 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 10:51:52,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:51:52,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 10:51:52,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-10-13 10:51:52,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 10:51:52,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-10-13 10:51:52,175 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 45 [2020-10-13 10:51:52,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:52,175 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-10-13 10:51:52,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:51:52,175 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-10-13 10:51:52,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 10:51:52,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:52,176 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:52,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:51:52,177 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:52,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:52,177 INFO L82 PathProgramCache]: Analyzing trace with hash -979809680, now seen corresponding path program 11 times [2020-10-13 10:51:52,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:52,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164053152] [2020-10-13 10:51:52,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:52,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:52,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:52,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:52,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:52,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:52,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:52,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:52,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:52,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:54,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:54,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 10:51:54,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 10:51:54,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2024 [2020-10-13 10:51:54,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:54,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:51:54,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:54,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 10:51:54,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:54,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:54,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:54,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:54,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:54,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:54,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:54,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 10:51:54,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:54,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:54,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:54,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:54,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 10:51:54,366 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 112 proven. 100 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 10:51:54,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164053152] [2020-10-13 10:51:54,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:54,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:51:54,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296976135] [2020-10-13 10:51:54,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:51:54,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:54,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:51:54,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:51:54,371 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 11 states. [2020-10-13 10:51:54,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:54,440 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2020-10-13 10:51:54,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:51:54,442 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 48 [2020-10-13 10:51:54,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:54,443 INFO L225 Difference]: With dead ends: 74 [2020-10-13 10:51:54,444 INFO L226 Difference]: Without dead ends: 53 [2020-10-13 10:51:54,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:51:54,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-13 10:51:54,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-13 10:51:54,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 10:51:54,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2020-10-13 10:51:54,456 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 48 [2020-10-13 10:51:54,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:54,457 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2020-10-13 10:51:54,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:51:54,457 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2020-10-13 10:51:54,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 10:51:54,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:54,460 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:54,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:51:54,461 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:54,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:54,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1750256597, now seen corresponding path program 12 times [2020-10-13 10:51:54,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:54,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36951772] [2020-10-13 10:51:54,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:54,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:54,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:54,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:54,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:54,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:54,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:54,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:54,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:54,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:54,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:56,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:56,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 10:51:56,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 10:51:56,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2293 [2020-10-13 10:51:56,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:56,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:51:56,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:51:56,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 10:51:56,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:56,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:56,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:56,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:56,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:56,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:56,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:51:56,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:56,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:56,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:56,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:56,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:56,908 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 125 proven. 126 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 10:51:56,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36951772] [2020-10-13 10:51:56,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:56,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:51:56,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216824751] [2020-10-13 10:51:56,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:51:56,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:56,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:51:56,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:51:56,912 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand 12 states. [2020-10-13 10:51:56,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:56,979 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2020-10-13 10:51:56,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:51:56,980 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-13 10:51:56,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:56,981 INFO L225 Difference]: With dead ends: 77 [2020-10-13 10:51:56,981 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 10:51:56,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:51:56,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 10:51:56,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-13 10:51:56,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 10:51:56,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2020-10-13 10:51:56,987 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 51 [2020-10-13 10:51:56,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:56,988 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2020-10-13 10:51:56,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:51:56,988 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2020-10-13 10:51:56,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 10:51:56,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:56,989 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:56,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:51:56,989 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:56,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:56,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1829131120, now seen corresponding path program 13 times [2020-10-13 10:51:56,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:56,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633650976] [2020-10-13 10:51:56,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:57,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:57,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:57,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:57,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:57,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:57,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:57,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:57,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:57,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:57,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:57,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:59,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:59,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 10:51:59,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 10:51:59,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2449 [2020-10-13 10:51:59,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:59,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:51:59,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:51:59,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 10:51:59,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:59,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:51:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:59,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:59,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:51:59,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:51:59,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:51:59,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:51:59,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:51:59,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:51:59,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:51:59,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:51:59,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:51:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 216 proven. 57 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-13 10:51:59,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633650976] [2020-10-13 10:51:59,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:51:59,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:51:59,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314847301] [2020-10-13 10:51:59,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:51:59,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:51:59,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:51:59,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:51:59,522 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 8 states. [2020-10-13 10:51:59,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:51:59,569 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2020-10-13 10:51:59,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:51:59,570 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-10-13 10:51:59,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:51:59,571 INFO L225 Difference]: With dead ends: 76 [2020-10-13 10:51:59,571 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 10:51:59,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:51:59,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 10:51:59,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-13 10:51:59,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 10:51:59,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2020-10-13 10:51:59,578 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 54 [2020-10-13 10:51:59,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:51:59,578 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2020-10-13 10:51:59,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:51:59,579 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2020-10-13 10:51:59,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 10:51:59,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:51:59,579 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:51:59,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:51:59,580 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:51:59,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:51:59,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1810233075, now seen corresponding path program 14 times [2020-10-13 10:51:59,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:51:59,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002826165] [2020-10-13 10:51:59,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:51:59,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:51:59,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:59,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:59,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:59,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:59,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:51:59,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:00,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:00,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:00,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:00,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:00,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:02,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:02,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 10:52:02,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 10:52:02,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2493 [2020-10-13 10:52:02,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:02,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:52:02,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:02,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 10:52:02,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:02,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:02,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:02,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:02,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:02,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:02,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:02,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:02,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:02,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:02,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:02,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:02,192 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 170 proven. 155 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-13 10:52:02,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002826165] [2020-10-13 10:52:02,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:02,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:52:02,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672651123] [2020-10-13 10:52:02,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:52:02,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:02,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:52:02,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:52:02,194 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 13 states. [2020-10-13 10:52:02,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:02,230 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2020-10-13 10:52:02,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:52:02,231 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-10-13 10:52:02,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:02,232 INFO L225 Difference]: With dead ends: 86 [2020-10-13 10:52:02,232 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 10:52:02,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:52:02,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 10:52:02,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-13 10:52:02,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 10:52:02,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 67 transitions. [2020-10-13 10:52:02,237 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 67 transitions. Word has length 57 [2020-10-13 10:52:02,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:02,238 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 67 transitions. [2020-10-13 10:52:02,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:52:02,238 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 67 transitions. [2020-10-13 10:52:02,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 10:52:02,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:02,239 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:02,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:52:02,239 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:02,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:02,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1325276750, now seen corresponding path program 15 times [2020-10-13 10:52:02,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:02,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523407157] [2020-10-13 10:52:02,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:02,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:02,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:02,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:02,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:02,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:02,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:02,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:02,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:02,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:02,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:02,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:03,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:06,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:06,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 10:52:06,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 10:52:06,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4119 [2020-10-13 10:52:06,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:06,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:52:06,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:06,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 10:52:06,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:06,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:06,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:06,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:06,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:06,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:06,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:06,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:06,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:06,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:06,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:06,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:06,496 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 186 proven. 187 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-13 10:52:06,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523407157] [2020-10-13 10:52:06,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:06,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:52:06,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436715379] [2020-10-13 10:52:06,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:52:06,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:06,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:52:06,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:52:06,498 INFO L87 Difference]: Start difference. First operand 61 states and 67 transitions. Second operand 14 states. [2020-10-13 10:52:06,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:06,549 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2020-10-13 10:52:06,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:52:06,549 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 60 [2020-10-13 10:52:06,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:06,550 INFO L225 Difference]: With dead ends: 89 [2020-10-13 10:52:06,550 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 10:52:06,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:52:06,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 10:52:06,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-13 10:52:06,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 10:52:06,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-10-13 10:52:06,555 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 60 [2020-10-13 10:52:06,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:06,556 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-10-13 10:52:06,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:52:06,556 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-10-13 10:52:06,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 10:52:06,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:06,557 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:06,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:52:06,557 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:06,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:06,557 INFO L82 PathProgramCache]: Analyzing trace with hash 2033584877, now seen corresponding path program 16 times [2020-10-13 10:52:06,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:06,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263778126] [2020-10-13 10:52:06,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:06,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:06,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:06,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:06,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:06,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:06,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:07,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:07,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:07,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:07,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:07,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:07,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:07,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:09,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:09,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 10:52:09,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 10:52:09,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2675 [2020-10-13 10:52:09,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:09,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:52:09,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 10:52:09,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 10:52:09,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:09,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:09,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:09,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:09,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:09,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:09,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:09,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:09,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:09,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:09,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:09,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:09,306 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 313 proven. 86 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-13 10:52:09,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263778126] [2020-10-13 10:52:09,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:09,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:52:09,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531998003] [2020-10-13 10:52:09,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:52:09,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:09,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:52:09,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:52:09,308 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 9 states. [2020-10-13 10:52:09,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:09,375 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2020-10-13 10:52:09,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:52:09,376 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2020-10-13 10:52:09,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:09,377 INFO L225 Difference]: With dead ends: 88 [2020-10-13 10:52:09,377 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 10:52:09,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:52:09,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 10:52:09,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-10-13 10:52:09,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 10:52:09,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-10-13 10:52:09,382 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 63 [2020-10-13 10:52:09,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:09,383 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-10-13 10:52:09,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:52:09,383 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-10-13 10:52:09,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 10:52:09,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:09,384 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 12, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:09,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:52:09,384 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:09,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:09,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1598239120, now seen corresponding path program 17 times [2020-10-13 10:52:09,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:09,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149680258] [2020-10-13 10:52:09,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:09,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:09,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:09,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:09,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:09,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:09,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:09,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:09,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:09,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:09,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:09,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:09,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:09,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:11,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:11,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 10:52:11,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 10:52:11,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2217 [2020-10-13 10:52:11,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:11,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:52:11,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:11,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 10:52:11,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:11,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:11,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:11,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:11,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:11,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:11,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:11,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:11,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:11,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:11,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:11,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:52:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 240 proven. 222 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-13 10:52:11,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149680258] [2020-10-13 10:52:11,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:11,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:52:11,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478586737] [2020-10-13 10:52:11,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:52:11,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:11,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:52:11,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:52:11,780 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 15 states. [2020-10-13 10:52:11,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:11,854 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2020-10-13 10:52:11,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:52:11,855 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2020-10-13 10:52:11,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:11,856 INFO L225 Difference]: With dead ends: 98 [2020-10-13 10:52:11,856 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 10:52:11,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:52:11,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 10:52:11,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-10-13 10:52:11,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 10:52:11,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2020-10-13 10:52:11,862 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 66 [2020-10-13 10:52:11,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:11,863 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2020-10-13 10:52:11,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:52:11,863 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2020-10-13 10:52:11,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 10:52:11,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:11,864 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 13, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:11,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:52:11,865 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:11,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:11,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1090798219, now seen corresponding path program 18 times [2020-10-13 10:52:11,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:11,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020896074] [2020-10-13 10:52:11,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:11,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:11,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:12,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:12,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:12,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:12,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:12,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:12,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:12,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:13,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:13,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:13,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:13,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:13,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:16,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:16,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 10:52:16,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 10:52:16,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 10:52:16,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:16,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:52:16,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:16,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 10:52:16,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:17,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:17,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:17,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:17,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:17,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:17,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:17,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:17,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:17,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:17,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:17,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:17,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 259 proven. 260 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-13 10:52:17,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020896074] [2020-10-13 10:52:17,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:17,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:52:17,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014587545] [2020-10-13 10:52:17,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:52:17,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:17,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:52:17,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:52:17,054 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand 16 states. [2020-10-13 10:52:17,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:17,113 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2020-10-13 10:52:17,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:52:17,114 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2020-10-13 10:52:17,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:17,115 INFO L225 Difference]: With dead ends: 101 [2020-10-13 10:52:17,115 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 10:52:17,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:52:17,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 10:52:17,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-13 10:52:17,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 10:52:17,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2020-10-13 10:52:17,121 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 69 [2020-10-13 10:52:17,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:17,123 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2020-10-13 10:52:17,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:52:17,123 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2020-10-13 10:52:17,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 10:52:17,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:17,125 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 14, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:17,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:52:17,125 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:17,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:17,126 INFO L82 PathProgramCache]: Analyzing trace with hash -2091168848, now seen corresponding path program 19 times [2020-10-13 10:52:17,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:17,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968141579] [2020-10-13 10:52:17,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:17,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:17,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:17,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:17,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:17,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:17,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:17,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:18,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:18,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:18,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:18,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:18,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:18,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:18,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:18,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:21,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:21,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 10:52:21,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 10:52:21,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4240 [2020-10-13 10:52:21,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:21,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:52:21,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 10:52:21,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 10:52:21,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:21,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:21,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:21,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:21,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:21,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:21,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:21,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:21,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:21,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:21,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:21,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 428 proven. 121 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-13 10:52:21,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968141579] [2020-10-13 10:52:21,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:21,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:52:21,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353217354] [2020-10-13 10:52:21,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:52:21,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:21,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:52:21,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:52:21,476 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand 10 states. [2020-10-13 10:52:21,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:21,543 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2020-10-13 10:52:21,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:52:21,543 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-10-13 10:52:21,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:21,544 INFO L225 Difference]: With dead ends: 100 [2020-10-13 10:52:21,544 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 10:52:21,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:52:21,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 10:52:21,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-10-13 10:52:21,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 10:52:21,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2020-10-13 10:52:21,550 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 72 [2020-10-13 10:52:21,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:21,551 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2020-10-13 10:52:21,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:52:21,551 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2020-10-13 10:52:21,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 10:52:21,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:21,552 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 14, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:21,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:52:21,552 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:21,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:21,552 INFO L82 PathProgramCache]: Analyzing trace with hash 74356205, now seen corresponding path program 20 times [2020-10-13 10:52:21,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:21,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817794898] [2020-10-13 10:52:21,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:21,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:21,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:21,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:21,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:21,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:21,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:21,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:22,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:22,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:22,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:22,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:22,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:22,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:22,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:22,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:26,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:26,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 10:52:26,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 10:52:26,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 10:52:26,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:26,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:52:26,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:26,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 10:52:26,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:26,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:26,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:26,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:26,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:26,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:26,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:26,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:26,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:26,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:26,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:26,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:26,714 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 322 proven. 301 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-13 10:52:26,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817794898] [2020-10-13 10:52:26,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:26,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:52:26,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546378568] [2020-10-13 10:52:26,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:52:26,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:26,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:52:26,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:52:26,720 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand 17 states. [2020-10-13 10:52:26,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:26,802 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2020-10-13 10:52:26,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:52:26,802 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2020-10-13 10:52:26,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:26,803 INFO L225 Difference]: With dead ends: 110 [2020-10-13 10:52:26,803 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 10:52:26,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:52:26,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 10:52:26,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-13 10:52:26,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 10:52:26,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2020-10-13 10:52:26,809 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 75 [2020-10-13 10:52:26,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:26,809 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2020-10-13 10:52:26,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:52:26,809 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2020-10-13 10:52:26,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 10:52:26,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:26,810 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 15, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:26,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:52:26,811 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:26,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:26,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1495175342, now seen corresponding path program 21 times [2020-10-13 10:52:26,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:26,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404834607] [2020-10-13 10:52:26,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:26,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:26,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:26,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:26,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:26,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:26,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:27,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:27,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:27,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:27,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:27,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:27,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:27,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:27,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:27,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:28,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:31,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:31,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 10:52:31,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 10:52:31,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4793 [2020-10-13 10:52:31,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:31,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:52:31,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:31,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 10:52:31,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:31,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:31,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:31,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:31,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:31,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:31,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:31,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:31,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:31,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:31,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:31,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 344 proven. 345 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-13 10:52:31,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404834607] [2020-10-13 10:52:31,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:31,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:52:31,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761639882] [2020-10-13 10:52:31,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:52:31,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:31,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:52:31,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:52:31,806 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 18 states. [2020-10-13 10:52:31,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:31,882 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2020-10-13 10:52:31,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:52:31,882 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2020-10-13 10:52:31,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:31,883 INFO L225 Difference]: With dead ends: 113 [2020-10-13 10:52:31,883 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 10:52:31,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:52:31,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 10:52:31,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-13 10:52:31,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 10:52:31,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2020-10-13 10:52:31,889 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 78 [2020-10-13 10:52:31,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:31,889 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2020-10-13 10:52:31,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:52:31,890 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2020-10-13 10:52:31,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 10:52:31,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:31,891 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 16, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:31,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:52:31,891 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:31,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:31,891 INFO L82 PathProgramCache]: Analyzing trace with hash -100540467, now seen corresponding path program 22 times [2020-10-13 10:52:31,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:31,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376486463] [2020-10-13 10:52:31,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:31,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:31,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:31,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:31,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:32,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:32,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:32,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:32,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:33,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:33,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:33,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:33,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:33,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:33,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:33,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:33,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:33,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:36,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:36,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 10:52:36,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 10:52:36,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 10:52:36,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:36,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:52:36,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 10:52:36,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 10:52:36,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:36,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:36,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:36,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:36,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:36,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:36,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:36,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:36,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:36,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:36,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:36,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 561 proven. 162 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-13 10:52:36,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376486463] [2020-10-13 10:52:36,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:36,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:52:36,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318102676] [2020-10-13 10:52:36,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:52:36,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:36,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:52:36,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:52:36,985 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand 11 states. [2020-10-13 10:52:37,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:37,040 INFO L93 Difference]: Finished difference Result 112 states and 128 transitions. [2020-10-13 10:52:37,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:52:37,040 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 81 [2020-10-13 10:52:37,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:37,041 INFO L225 Difference]: With dead ends: 112 [2020-10-13 10:52:37,041 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 10:52:37,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:52:37,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 10:52:37,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-10-13 10:52:37,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 10:52:37,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-10-13 10:52:37,047 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 81 [2020-10-13 10:52:37,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:37,047 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-10-13 10:52:37,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:52:37,048 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-10-13 10:52:37,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 10:52:37,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:37,049 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 16, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:37,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:52:37,049 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:37,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:37,049 INFO L82 PathProgramCache]: Analyzing trace with hash -2023968592, now seen corresponding path program 23 times [2020-10-13 10:52:37,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:37,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495048070] [2020-10-13 10:52:37,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:37,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:37,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:37,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:37,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:37,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:37,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:37,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:37,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:37,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:37,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:38,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:38,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:38,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:38,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:38,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:38,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:38,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:38,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:41,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:41,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 10:52:41,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 10:52:41,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4201 [2020-10-13 10:52:41,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:41,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 10:52:41,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:41,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 10:52:41,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:41,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:41,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:41,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:41,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:41,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:41,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:41,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:41,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:41,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:41,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:41,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:41,469 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 416 proven. 392 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-13 10:52:41,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495048070] [2020-10-13 10:52:41,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:41,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:52:41,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46449904] [2020-10-13 10:52:41,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:52:41,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:41,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:52:41,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:52:41,471 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 19 states. [2020-10-13 10:52:41,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:41,542 INFO L93 Difference]: Finished difference Result 122 states and 141 transitions. [2020-10-13 10:52:41,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:52:41,542 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 84 [2020-10-13 10:52:41,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:41,543 INFO L225 Difference]: With dead ends: 122 [2020-10-13 10:52:41,543 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 10:52:41,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:52:41,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 10:52:41,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-10-13 10:52:41,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 10:52:41,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2020-10-13 10:52:41,550 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 84 [2020-10-13 10:52:41,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:41,551 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2020-10-13 10:52:41,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:52:41,551 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2020-10-13 10:52:41,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 10:52:41,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:41,552 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 17, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:41,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:52:41,552 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:41,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:41,553 INFO L82 PathProgramCache]: Analyzing trace with hash 654809323, now seen corresponding path program 24 times [2020-10-13 10:52:41,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:41,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942735128] [2020-10-13 10:52:41,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:41,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:41,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:41,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:41,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:41,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:41,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:41,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:41,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:41,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:42,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:44,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:44,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:44,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:44,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:44,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:44,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:44,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:44,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:45,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:46,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:46,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 10:52:46,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 10:52:46,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 10:52:46,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:46,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 10:52:46,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:46,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 10:52:46,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:46,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:46,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:46,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:46,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:46,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:46,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:52:46,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:46,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:46,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:46,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:46,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:46,795 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 441 proven. 442 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-13 10:52:46,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942735128] [2020-10-13 10:52:46,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:46,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:52:46,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989028012] [2020-10-13 10:52:46,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:52:46,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:46,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:52:46,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:52:46,799 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand 20 states. [2020-10-13 10:52:46,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:46,879 INFO L93 Difference]: Finished difference Result 125 states and 144 transitions. [2020-10-13 10:52:46,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:52:46,881 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 87 [2020-10-13 10:52:46,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:46,882 INFO L225 Difference]: With dead ends: 125 [2020-10-13 10:52:46,882 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 10:52:46,884 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:52:46,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 10:52:46,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-13 10:52:46,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 10:52:46,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2020-10-13 10:52:46,891 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 87 [2020-10-13 10:52:46,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:46,892 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2020-10-13 10:52:46,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:52:46,894 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2020-10-13 10:52:46,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 10:52:46,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:46,895 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 18, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:46,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:52:46,895 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:46,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:46,896 INFO L82 PathProgramCache]: Analyzing trace with hash -659651888, now seen corresponding path program 25 times [2020-10-13 10:52:46,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:46,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872631913] [2020-10-13 10:52:46,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:46,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:46,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:46,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:47,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:47,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:47,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:47,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:47,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:47,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:48,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:49,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:49,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:49,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:49,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:49,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:49,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:49,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:49,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:49,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:50,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:51,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:51,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 10:52:51,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 10:52:51,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 10:52:51,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:51,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:52:51,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 10:52:51,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 10:52:51,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:51,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:51,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:51,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:51,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:51,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:51,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:51,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:51,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:51,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:51,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:51,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:51,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:52,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 712 proven. 209 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-13 10:52:52,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872631913] [2020-10-13 10:52:52,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:52,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:52:52,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570904541] [2020-10-13 10:52:52,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:52:52,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:52,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:52:52,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:52:52,002 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand 12 states. [2020-10-13 10:52:52,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:52,063 INFO L93 Difference]: Finished difference Result 124 states and 142 transitions. [2020-10-13 10:52:52,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:52:52,066 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 90 [2020-10-13 10:52:52,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:52,067 INFO L225 Difference]: With dead ends: 124 [2020-10-13 10:52:52,067 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 10:52:52,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:52:52,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 10:52:52,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2020-10-13 10:52:52,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 10:52:52,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2020-10-13 10:52:52,074 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 90 [2020-10-13 10:52:52,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:52,074 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2020-10-13 10:52:52,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:52:52,074 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2020-10-13 10:52:52,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 10:52:52,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:52,076 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 18, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:52,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:52:52,076 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:52,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:52,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1665829581, now seen corresponding path program 26 times [2020-10-13 10:52:52,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:52,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460488017] [2020-10-13 10:52:52,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:52,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:52,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:52,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:52,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:52,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:52,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:52,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:52,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:52,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:53,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:54,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:54,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:54,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:54,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:54,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:54,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:54,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:54,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:54,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:57,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:57,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-13 10:52:57,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 10:52:57,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:52:57,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:57,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 10:52:57,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:52:57,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 10:52:57,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:57,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:52:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:57,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:57,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:52:57,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:52:57,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:52:57,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:52:57,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:52:57,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:52:57,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:52:57,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:52:57,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:52:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 522 proven. 495 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-13 10:52:57,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460488017] [2020-10-13 10:52:57,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:52:57,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:52:57,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322646884] [2020-10-13 10:52:57,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:52:57,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:52:57,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:52:57,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:52:57,341 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand 21 states. [2020-10-13 10:52:57,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:52:57,416 INFO L93 Difference]: Finished difference Result 134 states and 155 transitions. [2020-10-13 10:52:57,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:52:57,419 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2020-10-13 10:52:57,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:52:57,420 INFO L225 Difference]: With dead ends: 134 [2020-10-13 10:52:57,420 INFO L226 Difference]: Without dead ends: 98 [2020-10-13 10:52:57,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:52:57,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-13 10:52:57,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-13 10:52:57,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 10:52:57,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2020-10-13 10:52:57,431 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 93 [2020-10-13 10:52:57,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:52:57,431 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2020-10-13 10:52:57,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:52:57,431 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2020-10-13 10:52:57,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 10:52:57,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:52:57,432 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 19, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:52:57,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:52:57,432 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:52:57,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:52:57,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1638812430, now seen corresponding path program 27 times [2020-10-13 10:52:57,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:52:57,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196686899] [2020-10-13 10:52:57,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:52:57,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:52:57,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:57,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:57,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:57,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:57,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:57,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:57,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:57,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:58,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:59,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:59,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:59,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:59,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:59,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:59,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:59,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:59,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:59,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:59,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:52:59,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:02,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:02,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 10:53:02,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-13 10:53:02,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:53:02,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:02,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 10:53:02,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:02,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 10:53:02,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:02,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:02,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:02,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:02,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:02,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:02,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:02,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:02,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:02,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:02,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:02,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 550 proven. 551 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-13 10:53:02,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196686899] [2020-10-13 10:53:02,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:02,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:53:02,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511549175] [2020-10-13 10:53:02,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:53:02,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:02,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:53:02,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:53:02,712 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand 22 states. [2020-10-13 10:53:02,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:02,790 INFO L93 Difference]: Finished difference Result 137 states and 158 transitions. [2020-10-13 10:53:02,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:53:02,795 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 96 [2020-10-13 10:53:02,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:02,796 INFO L225 Difference]: With dead ends: 137 [2020-10-13 10:53:02,796 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 10:53:02,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:53:02,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 10:53:02,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-10-13 10:53:02,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 10:53:02,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2020-10-13 10:53:02,807 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 96 [2020-10-13 10:53:02,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:02,807 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2020-10-13 10:53:02,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:53:02,808 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2020-10-13 10:53:02,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 10:53:02,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:02,809 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 20, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:02,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:53:02,810 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:02,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:02,810 INFO L82 PathProgramCache]: Analyzing trace with hash -988603219, now seen corresponding path program 28 times [2020-10-13 10:53:02,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:02,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062124555] [2020-10-13 10:53:02,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:02,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:02,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:02,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:02,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:02,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:03,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:03,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:03,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:03,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:03,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:03,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:03,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:03,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:03,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:03,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:03,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:03,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:03,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:04,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:07,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:07,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 10:53:07,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 10:53:07,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 10:53:07,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:07,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:53:07,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 10:53:07,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-13 10:53:07,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:07,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:07,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:07,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:07,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:07,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:07,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:07,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:07,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:07,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:07,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:07,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 881 proven. 262 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-10-13 10:53:07,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062124555] [2020-10-13 10:53:07,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:07,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:53:07,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776451264] [2020-10-13 10:53:07,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:53:07,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:07,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:53:07,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:53:07,932 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand 13 states. [2020-10-13 10:53:08,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:08,013 INFO L93 Difference]: Finished difference Result 136 states and 156 transitions. [2020-10-13 10:53:08,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:53:08,013 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 99 [2020-10-13 10:53:08,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:08,015 INFO L225 Difference]: With dead ends: 136 [2020-10-13 10:53:08,015 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 10:53:08,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:53:08,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 10:53:08,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 103. [2020-10-13 10:53:08,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 10:53:08,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2020-10-13 10:53:08,025 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 99 [2020-10-13 10:53:08,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:08,026 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2020-10-13 10:53:08,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:53:08,026 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2020-10-13 10:53:08,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 10:53:08,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:08,027 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 20, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:08,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:53:08,027 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:08,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:08,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1302870064, now seen corresponding path program 29 times [2020-10-13 10:53:08,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:08,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932668588] [2020-10-13 10:53:08,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:08,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:08,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:08,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:08,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:08,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:08,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:08,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:08,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:08,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:08,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:10,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:11,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:13,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:13,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 10:53:13,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 10:53:13,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 10:53:13,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:13,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 10:53:13,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:13,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 10:53:13,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:13,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:13,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:13,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:13,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:13,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:13,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:13,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:13,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:13,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:13,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:13,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:13,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 640 proven. 610 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-13 10:53:13,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932668588] [2020-10-13 10:53:13,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:13,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 10:53:13,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925765104] [2020-10-13 10:53:13,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 10:53:13,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:13,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 10:53:13,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:53:13,331 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand 23 states. [2020-10-13 10:53:13,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:13,420 INFO L93 Difference]: Finished difference Result 146 states and 169 transitions. [2020-10-13 10:53:13,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 10:53:13,421 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 102 [2020-10-13 10:53:13,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:13,422 INFO L225 Difference]: With dead ends: 146 [2020-10-13 10:53:13,422 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 10:53:13,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:53:13,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 10:53:13,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2020-10-13 10:53:13,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 10:53:13,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2020-10-13 10:53:13,442 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 102 [2020-10-13 10:53:13,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:13,443 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2020-10-13 10:53:13,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 10:53:13,443 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2020-10-13 10:53:13,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-13 10:53:13,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:13,447 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 21, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:13,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:53:13,447 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:13,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:13,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1247622987, now seen corresponding path program 30 times [2020-10-13 10:53:13,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:13,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183428498] [2020-10-13 10:53:13,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:13,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:13,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:13,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:13,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:13,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:13,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:13,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:13,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:13,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:14,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:15,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:15,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:15,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:15,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:15,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:15,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:15,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:15,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:15,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:15,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:15,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:15,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:18,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:18,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 10:53:18,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-13 10:53:18,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:53:18,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:18,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 10:53:18,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:18,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 10:53:18,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:18,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:18,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:18,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:18,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:18,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:18,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:18,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:18,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:18,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:18,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:18,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 671 proven. 672 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-13 10:53:18,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183428498] [2020-10-13 10:53:18,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:18,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 10:53:18,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498302109] [2020-10-13 10:53:18,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 10:53:18,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:18,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 10:53:18,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:53:18,776 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand 24 states. [2020-10-13 10:53:18,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:18,867 INFO L93 Difference]: Finished difference Result 149 states and 172 transitions. [2020-10-13 10:53:18,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 10:53:18,867 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 105 [2020-10-13 10:53:18,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:18,869 INFO L225 Difference]: With dead ends: 149 [2020-10-13 10:53:18,869 INFO L226 Difference]: Without dead ends: 110 [2020-10-13 10:53:18,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-13 10:53:18,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-13 10:53:18,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-13 10:53:18,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 10:53:18,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2020-10-13 10:53:18,885 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 105 [2020-10-13 10:53:18,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:18,885 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2020-10-13 10:53:18,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 10:53:18,886 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2020-10-13 10:53:18,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-13 10:53:18,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:18,887 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 22, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:18,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:53:18,888 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:18,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:18,888 INFO L82 PathProgramCache]: Analyzing trace with hash 719671792, now seen corresponding path program 31 times [2020-10-13 10:53:18,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:18,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944538562] [2020-10-13 10:53:18,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:18,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:18,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:19,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:19,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:19,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:19,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:19,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:19,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:19,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:19,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:20,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:20,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:20,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:20,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:20,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:20,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:20,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:20,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:20,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:20,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:20,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:20,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:20,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:23,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:23,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-13 10:53:23,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-13 10:53:23,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 10:53:23,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:23,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:53:23,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 10:53:23,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-13 10:53:23,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:24,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:24,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:24,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:24,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:24,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:24,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:24,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:24,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:24,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:24,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:24,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:24,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 1068 proven. 321 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2020-10-13 10:53:24,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944538562] [2020-10-13 10:53:24,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:24,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:53:24,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659887102] [2020-10-13 10:53:24,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:53:24,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:24,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:53:24,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:53:24,019 INFO L87 Difference]: Start difference. First operand 109 states and 120 transitions. Second operand 14 states. [2020-10-13 10:53:24,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:24,094 INFO L93 Difference]: Finished difference Result 148 states and 170 transitions. [2020-10-13 10:53:24,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:53:24,094 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 108 [2020-10-13 10:53:24,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:24,095 INFO L225 Difference]: With dead ends: 148 [2020-10-13 10:53:24,096 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 10:53:24,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:53:24,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 10:53:24,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 112. [2020-10-13 10:53:24,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 10:53:24,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 124 transitions. [2020-10-13 10:53:24,104 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 124 transitions. Word has length 108 [2020-10-13 10:53:24,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:24,104 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 124 transitions. [2020-10-13 10:53:24,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:53:24,104 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 124 transitions. [2020-10-13 10:53:24,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 10:53:24,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:24,105 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 22, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:24,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:53:24,106 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:24,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:24,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1149507667, now seen corresponding path program 32 times [2020-10-13 10:53:24,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:24,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832297701] [2020-10-13 10:53:24,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:24,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:24,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:24,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:24,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:24,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:24,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:24,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:24,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:24,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:24,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:25,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:25,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:26,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:26,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:26,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:26,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:26,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:26,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:26,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:26,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:26,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:26,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:28,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:29,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:29,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 10:53:29,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-13 10:53:29,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:53:29,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:29,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 10:53:29,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:29,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 10:53:29,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:29,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:29,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:29,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:29,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:29,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:29,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:29,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:29,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:29,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:29,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:29,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 770 proven. 737 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-13 10:53:29,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832297701] [2020-10-13 10:53:29,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:29,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 10:53:29,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790741491] [2020-10-13 10:53:29,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 10:53:29,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:29,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 10:53:29,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:53:29,447 INFO L87 Difference]: Start difference. First operand 112 states and 124 transitions. Second operand 25 states. [2020-10-13 10:53:29,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:29,537 INFO L93 Difference]: Finished difference Result 158 states and 183 transitions. [2020-10-13 10:53:29,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 10:53:29,538 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 111 [2020-10-13 10:53:29,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:29,539 INFO L225 Difference]: With dead ends: 158 [2020-10-13 10:53:29,539 INFO L226 Difference]: Without dead ends: 116 [2020-10-13 10:53:29,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-13 10:53:29,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-13 10:53:29,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-13 10:53:29,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 10:53:29,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2020-10-13 10:53:29,547 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 111 [2020-10-13 10:53:29,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:29,547 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2020-10-13 10:53:29,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 10:53:29,548 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2020-10-13 10:53:29,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 10:53:29,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:29,549 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 23, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:29,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:53:29,549 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:29,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:29,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1871924590, now seen corresponding path program 33 times [2020-10-13 10:53:29,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:29,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760660164] [2020-10-13 10:53:29,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:29,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:29,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:29,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:29,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:29,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:29,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:29,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:30,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:30,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:31,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:31,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:33,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:33,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:33,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:33,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:33,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:33,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:33,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:33,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:33,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:33,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:33,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:33,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:34,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:34,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-13 10:53:34,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-13 10:53:34,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 10:53:34,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:34,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 10:53:34,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:34,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 10:53:34,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:34,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:34,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:34,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:34,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:34,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:34,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:34,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:34,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:34,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:34,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:34,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:34,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 804 proven. 805 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-13 10:53:34,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760660164] [2020-10-13 10:53:34,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:34,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 10:53:34,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507366806] [2020-10-13 10:53:34,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 10:53:34,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:34,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 10:53:34,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:53:34,904 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand 26 states. [2020-10-13 10:53:34,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:34,996 INFO L93 Difference]: Finished difference Result 161 states and 186 transitions. [2020-10-13 10:53:34,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 10:53:34,996 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 114 [2020-10-13 10:53:34,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:34,997 INFO L225 Difference]: With dead ends: 161 [2020-10-13 10:53:34,997 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 10:53:34,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-13 10:53:34,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 10:53:35,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2020-10-13 10:53:35,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 10:53:35,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 130 transitions. [2020-10-13 10:53:35,005 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 130 transitions. Word has length 114 [2020-10-13 10:53:35,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:35,006 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 130 transitions. [2020-10-13 10:53:35,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 10:53:35,006 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 130 transitions. [2020-10-13 10:53:35,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-13 10:53:35,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:35,007 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 24, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:35,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 10:53:35,007 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:35,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:35,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1313357427, now seen corresponding path program 34 times [2020-10-13 10:53:35,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:35,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920433321] [2020-10-13 10:53:35,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:35,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:35,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:35,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:35,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:35,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:35,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:35,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:35,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:35,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:35,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:36,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:36,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:37,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:37,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:37,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:37,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:37,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:37,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:37,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:37,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:37,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:37,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:37,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:39,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:40,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:40,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-13 10:53:40,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-13 10:53:40,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 10:53:40,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:40,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:53:40,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-13 10:53:40,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-13 10:53:40,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:40,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:40,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:40,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:40,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:40,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:40,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:40,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:53:40,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:40,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:40,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:40,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:40,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:53:40,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 1273 proven. 386 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2020-10-13 10:53:40,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920433321] [2020-10-13 10:53:40,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:40,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:53:40,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219973377] [2020-10-13 10:53:40,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:53:40,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:40,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:53:40,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:53:40,204 INFO L87 Difference]: Start difference. First operand 118 states and 130 transitions. Second operand 15 states. [2020-10-13 10:53:40,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:40,282 INFO L93 Difference]: Finished difference Result 160 states and 184 transitions. [2020-10-13 10:53:40,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:53:40,283 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 117 [2020-10-13 10:53:40,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:40,284 INFO L225 Difference]: With dead ends: 160 [2020-10-13 10:53:40,285 INFO L226 Difference]: Without dead ends: 155 [2020-10-13 10:53:40,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:53:40,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-13 10:53:40,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-13 10:53:40,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-13 10:53:40,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2020-10-13 10:53:40,299 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 117 [2020-10-13 10:53:40,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:40,300 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2020-10-13 10:53:40,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:53:40,300 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2020-10-13 10:53:40,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 10:53:40,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:40,301 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 24, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:40,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 10:53:40,302 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:40,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:40,302 INFO L82 PathProgramCache]: Analyzing trace with hash 505837296, now seen corresponding path program 35 times [2020-10-13 10:53:40,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:40,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158011030] [2020-10-13 10:53:40,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:40,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:40,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:40,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:40,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:40,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:40,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:40,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:40,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:41,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:41,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:42,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:42,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:43,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:44,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:44,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:44,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:44,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:44,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:44,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:45,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:45,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:45,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:45,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:45,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:45,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:45,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-13 10:53:45,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-13 10:53:45,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 10:53:45,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:45,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 10:53:45,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:45,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-13 10:53:45,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:45,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:45,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:45,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:45,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:45,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:45,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:45,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:45,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:45,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:45,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:45,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:53:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 912 proven. 876 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 10:53:45,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158011030] [2020-10-13 10:53:45,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:45,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 10:53:45,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878677154] [2020-10-13 10:53:45,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 10:53:45,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:45,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 10:53:45,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:53:45,796 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand 27 states. [2020-10-13 10:53:45,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:45,934 INFO L93 Difference]: Finished difference Result 170 states and 197 transitions. [2020-10-13 10:53:45,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 10:53:45,934 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 120 [2020-10-13 10:53:45,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:45,936 INFO L225 Difference]: With dead ends: 170 [2020-10-13 10:53:45,936 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 10:53:45,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-13 10:53:45,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 10:53:45,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-13 10:53:45,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 10:53:45,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 137 transitions. [2020-10-13 10:53:45,949 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 137 transitions. Word has length 120 [2020-10-13 10:53:45,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:45,950 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 137 transitions. [2020-10-13 10:53:45,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 10:53:45,950 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 137 transitions. [2020-10-13 10:53:45,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 10:53:45,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:45,952 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 25, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:45,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 10:53:45,952 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:45,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:45,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1345002923, now seen corresponding path program 36 times [2020-10-13 10:53:45,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:45,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483977013] [2020-10-13 10:53:45,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:45,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:46,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:46,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:46,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:46,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:46,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:46,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:46,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:46,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:46,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:47,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:47,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:49,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:50,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:50,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:50,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:50,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:50,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:50,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:50,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:50,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:50,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:50,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:50,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:50,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:50,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:50,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 10:53:50,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-13 10:53:50,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 10:53:50,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:50,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 10:53:50,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:53:50,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 10:53:50,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:51,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:51,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:51,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:51,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:51,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:51,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:51,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:51,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:51,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:51,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:51,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:51,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 949 proven. 950 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 10:53:51,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483977013] [2020-10-13 10:53:51,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:51,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 10:53:51,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202732645] [2020-10-13 10:53:51,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 10:53:51,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:51,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 10:53:51,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:53:51,439 INFO L87 Difference]: Start difference. First operand 124 states and 137 transitions. Second operand 28 states. [2020-10-13 10:53:51,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:51,537 INFO L93 Difference]: Finished difference Result 173 states and 200 transitions. [2020-10-13 10:53:51,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 10:53:51,538 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 123 [2020-10-13 10:53:51,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:51,539 INFO L225 Difference]: With dead ends: 173 [2020-10-13 10:53:51,539 INFO L226 Difference]: Without dead ends: 128 [2020-10-13 10:53:51,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-13 10:53:51,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-13 10:53:51,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-10-13 10:53:51,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-13 10:53:51,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 140 transitions. [2020-10-13 10:53:51,549 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 140 transitions. Word has length 123 [2020-10-13 10:53:51,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:51,549 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 140 transitions. [2020-10-13 10:53:51,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 10:53:51,549 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 140 transitions. [2020-10-13 10:53:51,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 10:53:51,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:51,550 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 26, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:51,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 10:53:51,550 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:51,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:51,551 INFO L82 PathProgramCache]: Analyzing trace with hash -76433136, now seen corresponding path program 37 times [2020-10-13 10:53:51,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:51,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976357088] [2020-10-13 10:53:51,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:51,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:51,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:51,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:51,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:51,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:51,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:51,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:52,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:52,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:52,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:52,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:53,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:54,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:55,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:55,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:55,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:55,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:55,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:55,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:55,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:55,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:55,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:55,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:55,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:55,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:55,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:55,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:56,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:56,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 10:53:56,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-13 10:53:56,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:53:56,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:56,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:53:56,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 10:53:56,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-13 10:53:56,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:56,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:53:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:56,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:56,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:53:56,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:53:56,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:53:56,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:53:56,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:53:56,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:53:56,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:53:56,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:53:56,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:53:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 1496 proven. 457 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2020-10-13 10:53:56,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976357088] [2020-10-13 10:53:56,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:53:56,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:53:56,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038338071] [2020-10-13 10:53:56,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:53:56,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:53:56,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:53:56,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:53:56,734 INFO L87 Difference]: Start difference. First operand 127 states and 140 transitions. Second operand 16 states. [2020-10-13 10:53:56,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:53:56,846 INFO L93 Difference]: Finished difference Result 172 states and 198 transitions. [2020-10-13 10:53:56,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:53:56,847 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 126 [2020-10-13 10:53:56,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:53:56,849 INFO L225 Difference]: With dead ends: 172 [2020-10-13 10:53:56,849 INFO L226 Difference]: Without dead ends: 167 [2020-10-13 10:53:56,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:53:56,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-13 10:53:56,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 130. [2020-10-13 10:53:56,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 10:53:56,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 144 transitions. [2020-10-13 10:53:56,864 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 144 transitions. Word has length 126 [2020-10-13 10:53:56,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:53:56,864 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 144 transitions. [2020-10-13 10:53:56,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:53:56,865 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 144 transitions. [2020-10-13 10:53:56,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-13 10:53:56,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:53:56,866 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 26, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:53:56,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 10:53:56,867 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:53:56,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:53:56,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1102009203, now seen corresponding path program 38 times [2020-10-13 10:53:56,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:53:56,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858579110] [2020-10-13 10:53:56,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:53:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:53:56,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:57,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:57,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:57,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:57,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:57,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:57,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:57,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:57,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:58,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:59,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:53:59,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:01,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:01,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-13 10:54:01,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 10:54:01,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:54:01,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:01,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 10:54:01,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:01,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-13 10:54:01,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:02,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:02,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:02,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:02,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:02,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:02,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:02,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:02,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:02,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:02,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:02,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:02,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 1066 proven. 1027 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-13 10:54:02,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858579110] [2020-10-13 10:54:02,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:02,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 10:54:02,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324952105] [2020-10-13 10:54:02,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 10:54:02,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:02,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 10:54:02,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:54:02,336 INFO L87 Difference]: Start difference. First operand 130 states and 144 transitions. Second operand 29 states. [2020-10-13 10:54:02,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:02,448 INFO L93 Difference]: Finished difference Result 182 states and 211 transitions. [2020-10-13 10:54:02,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 10:54:02,448 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 129 [2020-10-13 10:54:02,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:02,449 INFO L225 Difference]: With dead ends: 182 [2020-10-13 10:54:02,450 INFO L226 Difference]: Without dead ends: 134 [2020-10-13 10:54:02,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-13 10:54:02,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-13 10:54:02,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-13 10:54:02,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 10:54:02,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 147 transitions. [2020-10-13 10:54:02,465 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 147 transitions. Word has length 129 [2020-10-13 10:54:02,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:02,466 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 147 transitions. [2020-10-13 10:54:02,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 10:54:02,466 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 147 transitions. [2020-10-13 10:54:02,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-13 10:54:02,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:02,468 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 27, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:02,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 10:54:02,468 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:02,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:02,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1580439502, now seen corresponding path program 39 times [2020-10-13 10:54:02,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:02,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235623363] [2020-10-13 10:54:02,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:02,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:02,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:02,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:02,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:02,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:02,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:02,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:03,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:03,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:03,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:03,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:04,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:05,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:05,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:05,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:05,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:05,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:05,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:05,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:05,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:05,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:06,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:06,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:06,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:06,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:07,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:07,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-13 10:54:07,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-13 10:54:07,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:54:07,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:07,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 10:54:07,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:07,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-13 10:54:07,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:07,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:07,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:07,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:07,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:07,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:07,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:07,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:07,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:07,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:07,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:07,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:54:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 1106 proven. 1107 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-13 10:54:07,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235623363] [2020-10-13 10:54:07,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:07,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 10:54:07,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946202661] [2020-10-13 10:54:07,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 10:54:07,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:07,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 10:54:07,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:54:07,971 INFO L87 Difference]: Start difference. First operand 133 states and 147 transitions. Second operand 30 states. [2020-10-13 10:54:08,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:08,097 INFO L93 Difference]: Finished difference Result 185 states and 214 transitions. [2020-10-13 10:54:08,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 10:54:08,097 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 132 [2020-10-13 10:54:08,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:08,098 INFO L225 Difference]: With dead ends: 185 [2020-10-13 10:54:08,099 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 10:54:08,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-13 10:54:08,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 10:54:08,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-10-13 10:54:08,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 10:54:08,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 150 transitions. [2020-10-13 10:54:08,111 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 150 transitions. Word has length 132 [2020-10-13 10:54:08,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:08,112 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 150 transitions. [2020-10-13 10:54:08,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 10:54:08,112 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 150 transitions. [2020-10-13 10:54:08,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-13 10:54:08,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:08,114 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 28, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:08,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 10:54:08,114 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:08,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:08,115 INFO L82 PathProgramCache]: Analyzing trace with hash 498978413, now seen corresponding path program 40 times [2020-10-13 10:54:08,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:08,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638253574] [2020-10-13 10:54:08,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:08,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:08,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:08,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:08,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:08,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:08,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:08,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:08,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:08,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:08,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:08,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:10,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:11,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:11,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:11,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:11,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:11,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:11,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:11,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:11,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:11,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:11,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:11,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:11,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:11,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:11,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:13,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:13,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-13 10:54:13,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-13 10:54:13,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 10:54:13,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:13,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 10:54:13,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-13 10:54:13,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-13 10:54:13,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:13,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:13,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:13,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:13,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:13,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:13,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:13,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:13,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:13,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:13,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:13,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:13,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 1737 proven. 534 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-10-13 10:54:13,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638253574] [2020-10-13 10:54:13,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:13,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 10:54:13,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696364201] [2020-10-13 10:54:13,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 10:54:13,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:13,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 10:54:13,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:54:13,302 INFO L87 Difference]: Start difference. First operand 136 states and 150 transitions. Second operand 17 states. [2020-10-13 10:54:13,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:13,391 INFO L93 Difference]: Finished difference Result 184 states and 212 transitions. [2020-10-13 10:54:13,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:54:13,391 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 135 [2020-10-13 10:54:13,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:13,392 INFO L225 Difference]: With dead ends: 184 [2020-10-13 10:54:13,393 INFO L226 Difference]: Without dead ends: 179 [2020-10-13 10:54:13,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-13 10:54:13,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-13 10:54:13,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 139. [2020-10-13 10:54:13,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-13 10:54:13,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 154 transitions. [2020-10-13 10:54:13,403 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 154 transitions. Word has length 135 [2020-10-13 10:54:13,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:13,403 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 154 transitions. [2020-10-13 10:54:13,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 10:54:13,404 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 154 transitions. [2020-10-13 10:54:13,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-13 10:54:13,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:13,405 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 28, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:13,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 10:54:13,405 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:13,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:13,406 INFO L82 PathProgramCache]: Analyzing trace with hash -231031280, now seen corresponding path program 41 times [2020-10-13 10:54:13,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:13,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594213618] [2020-10-13 10:54:13,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:13,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:13,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:13,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:13,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:13,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:13,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:14,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:14,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:14,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:15,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:15,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:15,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:15,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:15,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:15,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:15,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:16,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:16,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:16,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:16,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:16,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:18,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:18,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-13 10:54:18,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-13 10:54:18,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 10:54:18,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:18,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 10:54:18,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:18,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-13 10:54:18,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:18,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:18,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:18,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:18,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:18,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:18,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:18,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:18,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:18,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:18,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:18,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2709 backedges. 1232 proven. 1190 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-13 10:54:18,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594213618] [2020-10-13 10:54:18,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:18,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 10:54:18,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943540952] [2020-10-13 10:54:18,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 10:54:18,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:18,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 10:54:18,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:54:18,945 INFO L87 Difference]: Start difference. First operand 139 states and 154 transitions. Second operand 31 states. [2020-10-13 10:54:19,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:19,067 INFO L93 Difference]: Finished difference Result 194 states and 225 transitions. [2020-10-13 10:54:19,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:54:19,067 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 138 [2020-10-13 10:54:19,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:19,068 INFO L225 Difference]: With dead ends: 194 [2020-10-13 10:54:19,069 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 10:54:19,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-13 10:54:19,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 10:54:19,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2020-10-13 10:54:19,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 10:54:19,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 157 transitions. [2020-10-13 10:54:19,080 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 157 transitions. Word has length 138 [2020-10-13 10:54:19,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:19,080 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 157 transitions. [2020-10-13 10:54:19,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 10:54:19,080 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 157 transitions. [2020-10-13 10:54:19,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-13 10:54:19,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:19,081 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 29, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:19,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 10:54:19,082 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:19,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:19,083 INFO L82 PathProgramCache]: Analyzing trace with hash -501789685, now seen corresponding path program 42 times [2020-10-13 10:54:19,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:19,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549501035] [2020-10-13 10:54:19,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:19,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:19,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:19,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:19,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:19,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:19,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:19,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:19,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:19,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:20,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:21,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:22,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:24,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:24,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-13 10:54:24,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 10:54:24,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 10:54:24,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:24,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 10:54:24,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:24,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-13 10:54:24,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:24,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:24,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:24,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:24,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:24,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:24,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:24,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:24,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:24,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:24,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:24,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 1275 proven. 1276 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-13 10:54:24,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549501035] [2020-10-13 10:54:24,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:24,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 10:54:24,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266952324] [2020-10-13 10:54:24,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 10:54:24,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:24,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 10:54:24,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:54:24,629 INFO L87 Difference]: Start difference. First operand 142 states and 157 transitions. Second operand 32 states. [2020-10-13 10:54:24,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:24,732 INFO L93 Difference]: Finished difference Result 197 states and 228 transitions. [2020-10-13 10:54:24,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 10:54:24,732 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 141 [2020-10-13 10:54:24,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:24,733 INFO L225 Difference]: With dead ends: 197 [2020-10-13 10:54:24,733 INFO L226 Difference]: Without dead ends: 146 [2020-10-13 10:54:24,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-13 10:54:24,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-13 10:54:24,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-10-13 10:54:24,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-13 10:54:24,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 160 transitions. [2020-10-13 10:54:24,744 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 160 transitions. Word has length 141 [2020-10-13 10:54:24,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:24,744 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 160 transitions. [2020-10-13 10:54:24,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 10:54:24,744 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 160 transitions. [2020-10-13 10:54:24,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-13 10:54:24,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:24,745 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 30, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:24,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 10:54:24,746 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:24,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:24,746 INFO L82 PathProgramCache]: Analyzing trace with hash -716851152, now seen corresponding path program 43 times [2020-10-13 10:54:24,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:24,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658141028] [2020-10-13 10:54:24,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:24,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:24,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:24,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:24,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:25,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:25,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:25,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:25,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:26,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:27,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:28,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:28,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:29,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:29,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-13 10:54:29,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 10:54:29,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:54:29,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:29,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 10:54:29,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:29,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-13 10:54:29,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:30,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:30,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:30,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:30,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:30,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:30,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:30,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:30,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:30,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:30,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:30,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:30,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 1318 proven. 1365 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-13 10:54:30,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658141028] [2020-10-13 10:54:30,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:30,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 10:54:30,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190509189] [2020-10-13 10:54:30,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 10:54:30,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:30,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 10:54:30,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:54:30,318 INFO L87 Difference]: Start difference. First operand 145 states and 160 transitions. Second operand 33 states. [2020-10-13 10:54:30,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:30,457 INFO L93 Difference]: Finished difference Result 200 states and 231 transitions. [2020-10-13 10:54:30,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 10:54:30,457 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 144 [2020-10-13 10:54:30,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:30,458 INFO L225 Difference]: With dead ends: 200 [2020-10-13 10:54:30,459 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 10:54:30,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:54:30,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 10:54:30,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2020-10-13 10:54:30,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 10:54:30,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 163 transitions. [2020-10-13 10:54:30,469 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 163 transitions. Word has length 144 [2020-10-13 10:54:30,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:30,469 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 163 transitions. [2020-10-13 10:54:30,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 10:54:30,469 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 163 transitions. [2020-10-13 10:54:30,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 10:54:30,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:30,470 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 31, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:30,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 10:54:30,470 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:30,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:30,471 INFO L82 PathProgramCache]: Analyzing trace with hash 478191083, now seen corresponding path program 44 times [2020-10-13 10:54:30,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:30,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465290377] [2020-10-13 10:54:30,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:30,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:30,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:30,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:30,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:30,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:30,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:31,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:31,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:31,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:32,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:32,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:32,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:35,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:35,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 10:54:35,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 10:54:35,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:54:35,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:35,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 10:54:35,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:35,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-13 10:54:35,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:36,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:36,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:36,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:36,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:36,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:36,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:36,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:36,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:36,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:36,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:36,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:36,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:36,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 1361 proven. 1457 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-13 10:54:36,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465290377] [2020-10-13 10:54:36,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:36,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 10:54:36,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285922522] [2020-10-13 10:54:36,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 10:54:36,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:36,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 10:54:36,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:54:36,082 INFO L87 Difference]: Start difference. First operand 148 states and 163 transitions. Second operand 34 states. [2020-10-13 10:54:36,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:36,223 INFO L93 Difference]: Finished difference Result 203 states and 234 transitions. [2020-10-13 10:54:36,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 10:54:36,224 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 147 [2020-10-13 10:54:36,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:36,225 INFO L225 Difference]: With dead ends: 203 [2020-10-13 10:54:36,225 INFO L226 Difference]: Without dead ends: 152 [2020-10-13 10:54:36,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 10:54:36,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-13 10:54:36,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-10-13 10:54:36,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-13 10:54:36,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2020-10-13 10:54:36,235 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 147 [2020-10-13 10:54:36,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:36,236 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2020-10-13 10:54:36,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 10:54:36,236 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2020-10-13 10:54:36,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-13 10:54:36,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:36,237 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 32, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:36,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 10:54:36,237 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:36,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:36,238 INFO L82 PathProgramCache]: Analyzing trace with hash 997497424, now seen corresponding path program 45 times [2020-10-13 10:54:36,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:36,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751447780] [2020-10-13 10:54:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:36,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:36,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:36,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:36,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:36,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:36,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:36,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:37,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:37,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:37,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:37,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:37,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:38,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:41,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:41,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-13 10:54:41,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 10:54:41,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 10:54:41,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:41,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 10:54:41,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:41,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-13 10:54:41,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:41,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:41,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:41,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:41,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:41,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:41,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:41,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:41,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:41,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:41,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:41,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:41,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 1404 proven. 1552 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-13 10:54:41,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751447780] [2020-10-13 10:54:41,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:41,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 10:54:41,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971028559] [2020-10-13 10:54:41,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 10:54:41,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:41,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 10:54:41,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:54:41,878 INFO L87 Difference]: Start difference. First operand 151 states and 166 transitions. Second operand 35 states. [2020-10-13 10:54:42,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:42,010 INFO L93 Difference]: Finished difference Result 206 states and 237 transitions. [2020-10-13 10:54:42,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 10:54:42,010 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 150 [2020-10-13 10:54:42,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:42,011 INFO L225 Difference]: With dead ends: 206 [2020-10-13 10:54:42,012 INFO L226 Difference]: Without dead ends: 155 [2020-10-13 10:54:42,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 10:54:42,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-13 10:54:42,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2020-10-13 10:54:42,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-13 10:54:42,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 169 transitions. [2020-10-13 10:54:42,023 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 169 transitions. Word has length 150 [2020-10-13 10:54:42,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:42,023 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 169 transitions. [2020-10-13 10:54:42,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 10:54:42,023 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 169 transitions. [2020-10-13 10:54:42,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-13 10:54:42,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:42,024 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 33, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:42,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 10:54:42,025 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:42,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:42,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1180501963, now seen corresponding path program 46 times [2020-10-13 10:54:42,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:42,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635741343] [2020-10-13 10:54:42,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:42,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:42,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:42,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:42,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:42,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:42,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:42,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:42,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:43,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:43,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:43,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:44,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:45,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:47,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:47,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-13 10:54:47,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 10:54:47,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 10:54:47,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:47,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 10:54:47,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:47,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-13 10:54:47,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:47,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:47,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:47,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:47,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:47,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:47,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:47,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:47,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:47,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:47,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:47,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:47,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3384 backedges. 1447 proven. 1650 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-13 10:54:47,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635741343] [2020-10-13 10:54:47,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:47,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 10:54:47,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191207236] [2020-10-13 10:54:47,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 10:54:47,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:47,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 10:54:47,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:54:47,674 INFO L87 Difference]: Start difference. First operand 154 states and 169 transitions. Second operand 36 states. [2020-10-13 10:54:47,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:47,802 INFO L93 Difference]: Finished difference Result 209 states and 240 transitions. [2020-10-13 10:54:47,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 10:54:47,802 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 153 [2020-10-13 10:54:47,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:47,804 INFO L225 Difference]: With dead ends: 209 [2020-10-13 10:54:47,804 INFO L226 Difference]: Without dead ends: 158 [2020-10-13 10:54:47,805 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:54:47,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-13 10:54:47,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-10-13 10:54:47,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-13 10:54:47,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 172 transitions. [2020-10-13 10:54:47,815 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 172 transitions. Word has length 153 [2020-10-13 10:54:47,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:47,815 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 172 transitions. [2020-10-13 10:54:47,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 10:54:47,816 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 172 transitions. [2020-10-13 10:54:47,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-13 10:54:47,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:47,817 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 34, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:47,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 10:54:47,817 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:47,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:47,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1539742608, now seen corresponding path program 47 times [2020-10-13 10:54:47,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:47,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353846519] [2020-10-13 10:54:47,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:47,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:48,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:48,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:48,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:48,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:48,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:48,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:48,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:48,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:48,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:48,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:48,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:51,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:52,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:52,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:52,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:52,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:52,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:52,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:52,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:52,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:52,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:52,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:52,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:52,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:52,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:52,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:52,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:52,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:52,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:52,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:52,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:52,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:52,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-13 10:54:52,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 32 [2020-10-13 10:54:52,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 10:54:52,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:52,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 10:54:52,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-13 10:54:52,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-13 10:54:52,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:53,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:53,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:53,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:53,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:53,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:53,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:53,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:54:53,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:53,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:53,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:53,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:53,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:53,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 2409 proven. 617 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2020-10-13 10:54:53,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353846519] [2020-10-13 10:54:53,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:53,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 10:54:53,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882514925] [2020-10-13 10:54:53,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 10:54:53,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:53,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 10:54:53,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:54:53,057 INFO L87 Difference]: Start difference. First operand 157 states and 172 transitions. Second operand 19 states. [2020-10-13 10:54:53,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:53,163 INFO L93 Difference]: Finished difference Result 254 states and 300 transitions. [2020-10-13 10:54:53,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:54:53,163 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 156 [2020-10-13 10:54:53,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:53,165 INFO L225 Difference]: With dead ends: 254 [2020-10-13 10:54:53,165 INFO L226 Difference]: Without dead ends: 249 [2020-10-13 10:54:53,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:54:53,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-13 10:54:53,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 163. [2020-10-13 10:54:53,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-13 10:54:53,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 180 transitions. [2020-10-13 10:54:53,180 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 180 transitions. Word has length 156 [2020-10-13 10:54:53,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:53,180 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 180 transitions. [2020-10-13 10:54:53,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 10:54:53,180 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 180 transitions. [2020-10-13 10:54:53,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-13 10:54:53,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:53,182 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 34, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:53,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 10:54:53,182 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:53,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:53,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1825787728, now seen corresponding path program 48 times [2020-10-13 10:54:53,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:53,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215387984] [2020-10-13 10:54:53,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:53,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:53,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:53,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:53,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:53,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:53,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:53,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:53,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:53,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:53,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:54,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:54,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:54,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:55,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:57,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:58,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:58,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-13 10:54:58,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 10:54:58,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 10:54:58,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:58,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 10:54:58,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:54:58,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-13 10:54:58,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:58,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:54:58,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:58,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:58,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:54:58,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:54:58,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:54:58,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:54:58,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:54:58,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:54:58,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:54:58,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:54:58,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:54:58,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3825 backedges. 1698 proven. 1751 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-13 10:54:58,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215387984] [2020-10-13 10:54:58,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:54:58,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 10:54:58,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924741599] [2020-10-13 10:54:58,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 10:54:58,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:54:58,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 10:54:58,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:54:58,918 INFO L87 Difference]: Start difference. First operand 163 states and 180 transitions. Second operand 37 states. [2020-10-13 10:54:59,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:54:59,046 INFO L93 Difference]: Finished difference Result 224 states and 259 transitions. [2020-10-13 10:54:59,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 10:54:59,047 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 162 [2020-10-13 10:54:59,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:54:59,048 INFO L225 Difference]: With dead ends: 224 [2020-10-13 10:54:59,048 INFO L226 Difference]: Without dead ends: 167 [2020-10-13 10:54:59,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 10:54:59,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-13 10:54:59,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2020-10-13 10:54:59,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-13 10:54:59,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 183 transitions. [2020-10-13 10:54:59,060 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 183 transitions. Word has length 162 [2020-10-13 10:54:59,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:54:59,060 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 183 transitions. [2020-10-13 10:54:59,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 10:54:59,061 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 183 transitions. [2020-10-13 10:54:59,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-13 10:54:59,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:54:59,063 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 35, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:54:59,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 10:54:59,063 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:54:59,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:54:59,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1099670453, now seen corresponding path program 49 times [2020-10-13 10:54:59,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:54:59,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590272345] [2020-10-13 10:54:59,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:54:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:54:59,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:59,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:59,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:59,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:59,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:59,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:59,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:54:59,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:00,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:00,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:01,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:01,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:02,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:04,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:04,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-13 10:55:04,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 10:55:04,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:55:04,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:04,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 10:55:04,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:04,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-13 10:55:04,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:04,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:04,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:04,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:04,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:04,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:04,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:04,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:04,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:04,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:04,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:04,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:04,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:04,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3978 backedges. 1747 proven. 1855 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-13 10:55:04,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590272345] [2020-10-13 10:55:04,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:04,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 10:55:04,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403189920] [2020-10-13 10:55:04,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 10:55:04,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:04,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 10:55:04,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:55:04,832 INFO L87 Difference]: Start difference. First operand 166 states and 183 transitions. Second operand 38 states. [2020-10-13 10:55:04,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:04,969 INFO L93 Difference]: Finished difference Result 227 states and 262 transitions. [2020-10-13 10:55:04,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 10:55:04,970 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 165 [2020-10-13 10:55:04,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:04,971 INFO L225 Difference]: With dead ends: 227 [2020-10-13 10:55:04,971 INFO L226 Difference]: Without dead ends: 170 [2020-10-13 10:55:04,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 10:55:04,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-13 10:55:04,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2020-10-13 10:55:04,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-13 10:55:04,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 186 transitions. [2020-10-13 10:55:04,982 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 186 transitions. Word has length 165 [2020-10-13 10:55:04,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:04,983 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 186 transitions. [2020-10-13 10:55:04,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 10:55:04,983 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 186 transitions. [2020-10-13 10:55:04,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-13 10:55:04,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:04,984 INFO L422 BasicCegarLoop]: trace histogram [53, 52, 36, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:04,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 10:55:04,984 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:04,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:04,985 INFO L82 PathProgramCache]: Analyzing trace with hash 52029808, now seen corresponding path program 50 times [2020-10-13 10:55:04,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:04,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329522053] [2020-10-13 10:55:04,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:05,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:05,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:05,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:05,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:05,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:06,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:07,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:07,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:08,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:10,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:10,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-13 10:55:10,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 10:55:10,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 10:55:10,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:10,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 10:55:10,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:10,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-13 10:55:10,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:10,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:10,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:10,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:10,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:10,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:10,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:10,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:10,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:10,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:10,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:10,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:10,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:10,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4134 backedges. 1796 proven. 1962 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-13 10:55:10,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329522053] [2020-10-13 10:55:10,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:10,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 10:55:10,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093862737] [2020-10-13 10:55:10,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 10:55:10,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:10,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 10:55:10,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:55:10,788 INFO L87 Difference]: Start difference. First operand 169 states and 186 transitions. Second operand 39 states. [2020-10-13 10:55:10,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:10,917 INFO L93 Difference]: Finished difference Result 230 states and 265 transitions. [2020-10-13 10:55:10,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 10:55:10,918 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 168 [2020-10-13 10:55:10,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:10,919 INFO L225 Difference]: With dead ends: 230 [2020-10-13 10:55:10,919 INFO L226 Difference]: Without dead ends: 173 [2020-10-13 10:55:10,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 10:55:10,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-13 10:55:10,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2020-10-13 10:55:10,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-13 10:55:10,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 189 transitions. [2020-10-13 10:55:10,931 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 189 transitions. Word has length 168 [2020-10-13 10:55:10,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:10,931 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 189 transitions. [2020-10-13 10:55:10,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 10:55:10,931 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 189 transitions. [2020-10-13 10:55:10,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-13 10:55:10,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:10,932 INFO L422 BasicCegarLoop]: trace histogram [54, 53, 37, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:10,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 10:55:10,933 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:10,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:10,933 INFO L82 PathProgramCache]: Analyzing trace with hash -2139222485, now seen corresponding path program 51 times [2020-10-13 10:55:10,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:10,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108504735] [2020-10-13 10:55:10,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:10,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:11,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:11,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:11,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:11,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:11,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:11,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:11,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:11,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:11,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:11,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:12,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:12,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:15,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:15,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 10:55:15,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 10:55:15,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 10:55:15,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:15,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 10:55:15,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:15,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-13 10:55:15,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:16,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:16,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:16,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:16,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:16,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:16,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:16,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:16,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:16,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:16,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:16,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 1845 proven. 2072 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-13 10:55:16,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108504735] [2020-10-13 10:55:16,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:16,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 10:55:16,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911318999] [2020-10-13 10:55:16,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 10:55:16,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:16,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 10:55:16,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:55:16,786 INFO L87 Difference]: Start difference. First operand 172 states and 189 transitions. Second operand 40 states. [2020-10-13 10:55:16,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:16,922 INFO L93 Difference]: Finished difference Result 233 states and 268 transitions. [2020-10-13 10:55:16,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 10:55:16,923 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 171 [2020-10-13 10:55:16,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:16,925 INFO L225 Difference]: With dead ends: 233 [2020-10-13 10:55:16,925 INFO L226 Difference]: Without dead ends: 176 [2020-10-13 10:55:16,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 10:55:16,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-13 10:55:16,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2020-10-13 10:55:16,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-13 10:55:16,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 192 transitions. [2020-10-13 10:55:16,936 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 192 transitions. Word has length 171 [2020-10-13 10:55:16,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:16,936 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 192 transitions. [2020-10-13 10:55:16,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 10:55:16,937 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 192 transitions. [2020-10-13 10:55:16,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-13 10:55:16,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:16,938 INFO L422 BasicCegarLoop]: trace histogram [55, 54, 38, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:16,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 10:55:16,938 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:16,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:16,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1766615952, now seen corresponding path program 52 times [2020-10-13 10:55:16,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:16,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165006939] [2020-10-13 10:55:16,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:16,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:17,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:17,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:17,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:17,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:17,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:17,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:18,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:19,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:20,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:21,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:21,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:21,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-13 10:55:21,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 10:55:21,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 10:55:21,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:21,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 10:55:21,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:21,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-13 10:55:21,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:22,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:22,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:22,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:22,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:22,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:22,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:22,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:22,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:22,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:22,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:22,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:22,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:22,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 1894 proven. 2185 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-13 10:55:22,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165006939] [2020-10-13 10:55:22,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:22,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 10:55:22,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397021698] [2020-10-13 10:55:22,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 10:55:22,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:22,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 10:55:22,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:55:22,815 INFO L87 Difference]: Start difference. First operand 175 states and 192 transitions. Second operand 41 states. [2020-10-13 10:55:22,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:22,971 INFO L93 Difference]: Finished difference Result 236 states and 271 transitions. [2020-10-13 10:55:22,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 10:55:22,972 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 174 [2020-10-13 10:55:22,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:22,974 INFO L225 Difference]: With dead ends: 236 [2020-10-13 10:55:22,974 INFO L226 Difference]: Without dead ends: 179 [2020-10-13 10:55:22,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 10:55:22,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-13 10:55:22,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2020-10-13 10:55:22,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-13 10:55:22,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 195 transitions. [2020-10-13 10:55:22,985 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 195 transitions. Word has length 174 [2020-10-13 10:55:22,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:22,985 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 195 transitions. [2020-10-13 10:55:22,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 10:55:22,986 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 195 transitions. [2020-10-13 10:55:22,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-13 10:55:22,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:22,987 INFO L422 BasicCegarLoop]: trace histogram [56, 55, 39, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:22,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 10:55:22,987 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:22,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:22,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1345509387, now seen corresponding path program 53 times [2020-10-13 10:55:22,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:22,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117264822] [2020-10-13 10:55:22,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:23,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:23,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:23,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:23,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:23,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:23,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:24,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:24,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:24,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:25,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:27,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:27,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:27,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:27,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:27,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:28,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:28,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-13 10:55:28,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 10:55:28,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 10:55:28,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:28,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 10:55:28,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-13 10:55:28,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-13 10:55:28,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:28,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:28,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:28,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:28,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:28,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:28,220 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:28,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:28,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:28,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:28,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:28,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:28,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 3078 proven. 801 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2020-10-13 10:55:28,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117264822] [2020-10-13 10:55:28,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:28,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 10:55:28,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246124887] [2020-10-13 10:55:28,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 10:55:28,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:28,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 10:55:28,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:55:28,238 INFO L87 Difference]: Start difference. First operand 178 states and 195 transitions. Second operand 20 states. [2020-10-13 10:55:28,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:28,356 INFO L93 Difference]: Finished difference Result 235 states and 269 transitions. [2020-10-13 10:55:28,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 10:55:28,356 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 177 [2020-10-13 10:55:28,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:28,358 INFO L225 Difference]: With dead ends: 235 [2020-10-13 10:55:28,358 INFO L226 Difference]: Without dead ends: 230 [2020-10-13 10:55:28,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:55:28,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-13 10:55:28,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 181. [2020-10-13 10:55:28,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-13 10:55:28,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 199 transitions. [2020-10-13 10:55:28,370 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 199 transitions. Word has length 177 [2020-10-13 10:55:28,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:28,371 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 199 transitions. [2020-10-13 10:55:28,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 10:55:28,371 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 199 transitions. [2020-10-13 10:55:28,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-13 10:55:28,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:28,372 INFO L422 BasicCegarLoop]: trace histogram [57, 56, 39, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:28,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 10:55:28,372 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:28,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:28,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1274746958, now seen corresponding path program 54 times [2020-10-13 10:55:28,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:28,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868297751] [2020-10-13 10:55:28,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:28,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:28,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:28,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:28,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:28,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:29,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:29,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:29,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:30,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:30,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:31,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:33,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:33,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-13 10:55:33,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 10:55:33,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 10:55:33,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:33,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 10:55:33,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-13 10:55:33,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-13 10:55:33,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:33,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:33,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:33,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:33,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:33,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:33,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:33,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:33,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:33,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:33,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:33,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4788 backedges. 3205 proven. 902 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2020-10-13 10:55:33,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868297751] [2020-10-13 10:55:33,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:33,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 10:55:33,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902242192] [2020-10-13 10:55:33,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 10:55:33,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:33,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 10:55:33,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:55:33,650 INFO L87 Difference]: Start difference. First operand 181 states and 199 transitions. Second operand 21 states. [2020-10-13 10:55:33,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:33,764 INFO L93 Difference]: Finished difference Result 241 states and 277 transitions. [2020-10-13 10:55:33,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 10:55:33,765 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 180 [2020-10-13 10:55:33,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:33,767 INFO L225 Difference]: With dead ends: 241 [2020-10-13 10:55:33,767 INFO L226 Difference]: Without dead ends: 236 [2020-10-13 10:55:33,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-13 10:55:33,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-13 10:55:33,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 184. [2020-10-13 10:55:33,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-13 10:55:33,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 203 transitions. [2020-10-13 10:55:33,781 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 203 transitions. Word has length 180 [2020-10-13 10:55:33,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:33,781 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 203 transitions. [2020-10-13 10:55:33,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 10:55:33,782 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 203 transitions. [2020-10-13 10:55:33,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-13 10:55:33,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:33,783 INFO L422 BasicCegarLoop]: trace histogram [58, 57, 39, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:33,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-13 10:55:33,783 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:33,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:33,784 INFO L82 PathProgramCache]: Analyzing trace with hash -300916053, now seen corresponding path program 55 times [2020-10-13 10:55:33,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:33,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902592898] [2020-10-13 10:55:33,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:33,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:34,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:34,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:34,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:34,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:34,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:34,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:34,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:34,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:35,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:36,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:38,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:38,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-13 10:55:38,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 10:55:38,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 10:55:38,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:38,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 10:55:38,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:55:38,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-13 10:55:38,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:39,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:39,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:39,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:39,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:39,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:39,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:39,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:39,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:39,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:39,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:39,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4959 backedges. 2181 proven. 2301 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-10-13 10:55:39,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902592898] [2020-10-13 10:55:39,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:39,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 10:55:39,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045210519] [2020-10-13 10:55:39,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 10:55:39,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:39,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 10:55:39,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 10:55:39,723 INFO L87 Difference]: Start difference. First operand 184 states and 203 transitions. Second operand 42 states. [2020-10-13 10:55:39,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:39,873 INFO L93 Difference]: Finished difference Result 251 states and 290 transitions. [2020-10-13 10:55:39,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 10:55:39,874 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 183 [2020-10-13 10:55:39,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:39,875 INFO L225 Difference]: With dead ends: 251 [2020-10-13 10:55:39,875 INFO L226 Difference]: Without dead ends: 188 [2020-10-13 10:55:39,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 10:55:39,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-13 10:55:39,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2020-10-13 10:55:39,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-13 10:55:39,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 206 transitions. [2020-10-13 10:55:39,888 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 206 transitions. Word has length 183 [2020-10-13 10:55:39,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:39,889 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 206 transitions. [2020-10-13 10:55:39,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 10:55:39,889 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 206 transitions. [2020-10-13 10:55:39,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-13 10:55:39,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:39,890 INFO L422 BasicCegarLoop]: trace histogram [59, 58, 40, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:39,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-13 10:55:39,890 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:39,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:39,891 INFO L82 PathProgramCache]: Analyzing trace with hash -991113072, now seen corresponding path program 56 times [2020-10-13 10:55:39,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:39,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659754532] [2020-10-13 10:55:39,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:39,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:39,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:40,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:40,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:40,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:40,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:40,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:41,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:41,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:41,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:42,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:43,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:44,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:44,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-13 10:55:44,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 10:55:44,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 10:55:44,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:44,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 10:55:44,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-13 10:55:44,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-13 10:55:44,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:45,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:55:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:45,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:45,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:55:45,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:55:45,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:55:45,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:55:45,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:55:45,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:55:45,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:55:45,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:55:45,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:55:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5133 backedges. 3440 proven. 1009 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-10-13 10:55:45,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659754532] [2020-10-13 10:55:45,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:55:45,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 10:55:45,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321396085] [2020-10-13 10:55:45,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 10:55:45,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:55:45,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 10:55:45,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:55:45,196 INFO L87 Difference]: Start difference. First operand 187 states and 206 transitions. Second operand 22 states. [2020-10-13 10:55:45,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:55:45,312 INFO L93 Difference]: Finished difference Result 250 states and 288 transitions. [2020-10-13 10:55:45,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:55:45,313 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 186 [2020-10-13 10:55:45,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:55:45,314 INFO L225 Difference]: With dead ends: 250 [2020-10-13 10:55:45,314 INFO L226 Difference]: Without dead ends: 245 [2020-10-13 10:55:45,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:55:45,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-13 10:55:45,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 190. [2020-10-13 10:55:45,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-13 10:55:45,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 210 transitions. [2020-10-13 10:55:45,326 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 210 transitions. Word has length 186 [2020-10-13 10:55:45,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:55:45,326 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 210 transitions. [2020-10-13 10:55:45,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 10:55:45,326 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 210 transitions. [2020-10-13 10:55:45,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-13 10:55:45,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:55:45,327 INFO L422 BasicCegarLoop]: trace histogram [60, 59, 40, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:55:45,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-13 10:55:45,328 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:55:45,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:55:45,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1235510541, now seen corresponding path program 57 times [2020-10-13 10:55:45,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:55:45,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707723378] [2020-10-13 10:55:45,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:55:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:55:45,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:45,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:45,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:45,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:45,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:46,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:47,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:55:47,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking...