/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init3_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:50:15,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:50:15,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:50:15,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:50:15,525 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:50:15,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:50:15,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:50:15,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:50:15,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:50:15,532 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:50:15,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:50:15,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:50:15,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:50:15,536 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:50:15,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:50:15,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:50:15,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:50:15,540 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:50:15,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:50:15,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:50:15,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:50:15,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:50:15,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:50:15,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:50:15,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:50:15,553 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:50:15,554 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:50:15,555 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:50:15,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:50:15,557 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:50:15,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:50:15,558 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:50:15,559 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:50:15,560 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:50:15,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:50:15,561 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:50:15,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:50:15,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:50:15,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:50:15,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:50:15,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:50:15,566 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 04:50:15,593 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:50:15,593 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:50:15,594 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:50:15,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:50:15,595 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:50:15,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:50:15,595 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:50:15,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:50:15,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:50:15,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:50:15,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:50:15,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:50:15,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:50:15,597 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:50:15,597 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:50:15,597 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:50:15,597 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:50:15,598 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:50:15,598 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:50:15,598 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:50:15,598 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:50:15,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:50:15,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:50:15,599 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:50:15,599 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:50:15,599 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:50:15,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:50:15,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:50:15,600 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:50:15,600 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 04:50:15,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:50:15,917 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:50:15,921 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:50:15,923 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:50:15,923 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:50:15,924 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init3_ground-1.i [2020-10-13 04:50:15,994 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dfe97d570/7e9fda76e877435e92fddbaa0d858189/FLAGd2c3a756d [2020-10-13 04:50:16,471 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:50:16,472 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init3_ground-1.i [2020-10-13 04:50:16,480 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dfe97d570/7e9fda76e877435e92fddbaa0d858189/FLAGd2c3a756d [2020-10-13 04:50:16,862 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dfe97d570/7e9fda76e877435e92fddbaa0d858189 [2020-10-13 04:50:16,873 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:50:16,875 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:50:16,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:50:16,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:50:16,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:50:16,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:50:16" (1/1) ... [2020-10-13 04:50:16,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@482ef829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:16, skipping insertion in model container [2020-10-13 04:50:16,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:50:16" (1/1) ... [2020-10-13 04:50:16,894 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:50:16,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:50:17,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:50:17,184 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:50:17,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:50:17,223 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:50:17,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:17 WrapperNode [2020-10-13 04:50:17,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:50:17,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:50:17,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:50:17,225 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:50:17,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:17" (1/1) ... [2020-10-13 04:50:17,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:17" (1/1) ... [2020-10-13 04:50:17,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:17" (1/1) ... [2020-10-13 04:50:17,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:17" (1/1) ... [2020-10-13 04:50:17,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:17" (1/1) ... [2020-10-13 04:50:17,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:17" (1/1) ... [2020-10-13 04:50:17,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:17" (1/1) ... [2020-10-13 04:50:17,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:50:17,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:50:17,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:50:17,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:50:17,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:17" (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 04:50:17,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:50:17,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:50:17,418 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:50:17,418 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:50:17,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:50:17,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:50:17,419 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:50:17,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:50:17,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:50:17,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:50:17,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:50:17,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:50:17,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:50:17,659 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:50:17,659 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 04:50:17,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:50:17 BoogieIcfgContainer [2020-10-13 04:50:17,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:50:17,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:50:17,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:50:17,668 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:50:17,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:50:16" (1/3) ... [2020-10-13 04:50:17,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c8312b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:50:17, skipping insertion in model container [2020-10-13 04:50:17,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:17" (2/3) ... [2020-10-13 04:50:17,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c8312b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:50:17, skipping insertion in model container [2020-10-13 04:50:17,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:50:17" (3/3) ... [2020-10-13 04:50:17,672 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init3_ground-1.i [2020-10-13 04:50:17,685 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:50:17,693 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:50:17,710 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:50:17,741 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:50:17,741 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:50:17,741 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:50:17,741 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:50:17,741 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:50:17,742 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:50:17,742 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:50:17,742 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:50:17,768 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-13 04:50:17,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 04:50:17,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:17,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:17,778 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:17,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:17,787 INFO L82 PathProgramCache]: Analyzing trace with hash 578824766, now seen corresponding path program 1 times [2020-10-13 04:50:17,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:17,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072768657] [2020-10-13 04:50:17,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:17,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:17,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:18,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:18,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:18,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 04:50:18,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:50:18,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-13 04:50:18,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:18,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:18,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:50:18,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:18,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 04:50:18,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:18,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:18,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:18,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:18,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:18,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:18,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 04:50:18,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:18,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:18,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:18,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:18,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:18,397 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 04:50:18,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072768657] [2020-10-13 04:50:18,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:50:18,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:50:18,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576510509] [2020-10-13 04:50:18,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:50:18,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:18,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:50:18,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:50:18,428 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-10-13 04:50:18,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:18,522 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2020-10-13 04:50:18,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:50:18,523 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-13 04:50:18,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:18,532 INFO L225 Difference]: With dead ends: 47 [2020-10-13 04:50:18,533 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 04:50:18,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:50:18,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 04:50:18,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-13 04:50:18,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 04:50:18,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-10-13 04:50:18,575 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2020-10-13 04:50:18,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:18,576 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-10-13 04:50:18,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:50:18,576 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-10-13 04:50:18,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 04:50:18,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:18,577 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:18,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:50:18,578 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:18,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:18,579 INFO L82 PathProgramCache]: Analyzing trace with hash -823304390, now seen corresponding path program 1 times [2020-10-13 04:50:18,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:18,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234901317] [2020-10-13 04:50:18,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:18,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:18,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:18,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:18,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:18,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 04:50:18,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:50:18,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-13 04:50:18,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:18,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:50:18,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:18,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:50:18,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:18,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:18,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:18,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:18,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:18,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:18,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:50:18,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:18,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:18,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:18,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:18,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:18,920 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 04:50:18,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234901317] [2020-10-13 04:50:18,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:50:18,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:50:18,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597472063] [2020-10-13 04:50:18,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:50:18,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:18,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:50:18,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:50:18,925 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 4 states. [2020-10-13 04:50:19,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:19,002 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2020-10-13 04:50:19,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:50:19,003 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-13 04:50:19,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:19,004 INFO L225 Difference]: With dead ends: 40 [2020-10-13 04:50:19,005 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 04:50:19,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:50:19,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 04:50:19,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-13 04:50:19,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 04:50:19,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-13 04:50:19,014 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-10-13 04:50:19,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:19,015 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-13 04:50:19,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:50:19,015 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-13 04:50:19,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 04:50:19,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:19,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:19,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:50:19,017 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:19,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:19,017 INFO L82 PathProgramCache]: Analyzing trace with hash 3753729, now seen corresponding path program 1 times [2020-10-13 04:50:19,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:19,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861946422] [2020-10-13 04:50:19,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:19,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:19,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:19,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:19,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:19,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:19,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 04:50:19,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:50:19,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 777 [2020-10-13 04:50:19,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:19,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:50:19,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 04:50:19,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 04:50:19,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:19,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:19,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:19,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:19,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:19,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:19,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:50:19,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:19,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:19,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:19,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:19,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:19,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 04:50:19,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861946422] [2020-10-13 04:50:19,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:19,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:50:19,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140661129] [2020-10-13 04:50:19,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:50:19,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:19,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:50:19,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:50:19,856 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-10-13 04:50:19,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:19,955 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-10-13 04:50:19,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:50:19,956 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-13 04:50:19,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:19,957 INFO L225 Difference]: With dead ends: 45 [2020-10-13 04:50:19,957 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 04:50:19,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:50:19,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 04:50:19,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-13 04:50:19,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 04:50:19,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-10-13 04:50:19,966 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2020-10-13 04:50:19,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:19,966 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-10-13 04:50:19,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:50:19,967 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-10-13 04:50:19,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 04:50:19,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:19,968 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:19,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:50:19,969 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:19,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:19,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1185149478, now seen corresponding path program 2 times [2020-10-13 04:50:19,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:19,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691914429] [2020-10-13 04:50:19,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:19,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:19,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:19,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:20,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:20,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:21,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:21,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 04:50:21,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:50:21,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1221 [2020-10-13 04:50:21,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:21,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:50:21,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 04:50:21,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:50:21,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:21,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:21,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:21,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:21,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:21,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:21,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:50:21,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:21,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:21,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:21,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:21,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 04:50:21,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691914429] [2020-10-13 04:50:21,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:21,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:50:21,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231206359] [2020-10-13 04:50:21,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:50:21,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:21,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:50:21,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:50:21,247 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 6 states. [2020-10-13 04:50:21,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:21,331 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-10-13 04:50:21,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:50:21,332 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-13 04:50:21,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:21,333 INFO L225 Difference]: With dead ends: 50 [2020-10-13 04:50:21,333 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 04:50:21,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:50:21,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 04:50:21,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-13 04:50:21,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 04:50:21,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-13 04:50:21,341 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2020-10-13 04:50:21,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:21,341 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-13 04:50:21,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:50:21,341 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-13 04:50:21,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 04:50:21,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:21,342 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:21,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:50:21,343 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:21,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:21,343 INFO L82 PathProgramCache]: Analyzing trace with hash 455820257, now seen corresponding path program 3 times [2020-10-13 04:50:21,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:21,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021273601] [2020-10-13 04:50:21,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:21,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:21,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:21,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:22,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:23,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:23,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 04:50:23,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:50:23,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2145 [2020-10-13 04:50:23,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:23,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:50:23,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 04:50:23,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 04:50:23,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:23,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:23,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:23,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:23,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:23,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:23,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:23,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:50:23,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:23,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:23,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:23,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:23,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:50:23,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021273601] [2020-10-13 04:50:23,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:23,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:50:23,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902697092] [2020-10-13 04:50:23,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:50:23,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:23,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:50:23,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:50:23,567 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 7 states. [2020-10-13 04:50:23,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:23,683 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-10-13 04:50:23,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:50:23,684 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-13 04:50:23,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:23,685 INFO L225 Difference]: With dead ends: 55 [2020-10-13 04:50:23,685 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 04:50:23,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:50:23,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 04:50:23,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-13 04:50:23,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 04:50:23,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-13 04:50:23,704 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2020-10-13 04:50:23,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:23,704 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-13 04:50:23,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:50:23,705 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-13 04:50:23,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 04:50:23,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:23,707 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:23,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:50:23,708 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:23,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:23,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1002382458, now seen corresponding path program 4 times [2020-10-13 04:50:23,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:23,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015057019] [2020-10-13 04:50:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:23,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:23,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:23,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:25,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:27,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:27,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 04:50:27,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:50:27,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3696 [2020-10-13 04:50:27,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:27,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:50:27,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 04:50:27,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:50:27,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:27,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:27,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:27,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:27,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:27,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:27,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:27,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:50:27,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:27,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:27,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:27,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:27,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 04:50:27,504 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-13 04:50:27,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015057019] [2020-10-13 04:50:27,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:27,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:50:27,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744188142] [2020-10-13 04:50:27,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:50:27,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:27,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:50:27,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:50:27,508 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 8 states. [2020-10-13 04:50:27,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:27,629 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-13 04:50:27,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:50:27,630 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-13 04:50:27,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:27,631 INFO L225 Difference]: With dead ends: 60 [2020-10-13 04:50:27,631 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 04:50:27,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:50:27,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 04:50:27,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-13 04:50:27,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 04:50:27,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-13 04:50:27,638 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 29 [2020-10-13 04:50:27,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:27,639 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-13 04:50:27,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:50:27,639 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-13 04:50:27,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 04:50:27,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:27,640 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:27,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:50:27,640 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:27,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:27,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1395779391, now seen corresponding path program 5 times [2020-10-13 04:50:27,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:27,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178881271] [2020-10-13 04:50:27,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:27,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:27,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:27,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:27,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:30,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:32,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:32,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 04:50:32,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:50:32,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:50:32,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:32,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:50:32,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:32,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:50:32,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 13 [2020-10-13 04:50:32,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:32,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:32,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:32,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:32,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:32,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:32,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:32,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:32,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:32,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:32,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:32,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:32,743 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 04:50:32,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178881271] [2020-10-13 04:50:32,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:32,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:50:32,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656726338] [2020-10-13 04:50:32,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:50:32,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:32,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:50:32,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:50:32,746 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 9 states. [2020-10-13 04:50:32,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:32,850 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2020-10-13 04:50:32,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:50:32,851 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-13 04:50:32,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:32,852 INFO L225 Difference]: With dead ends: 65 [2020-10-13 04:50:32,852 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 04:50:32,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:50:32,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 04:50:32,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-13 04:50:32,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 04:50:32,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-10-13 04:50:32,859 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 32 [2020-10-13 04:50:32,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:32,859 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-10-13 04:50:32,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:50:32,859 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-10-13 04:50:32,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 04:50:32,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:32,860 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:32,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:50:32,861 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:32,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:32,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1957995290, now seen corresponding path program 6 times [2020-10-13 04:50:32,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:32,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940179511] [2020-10-13 04:50:32,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:32,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:32,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:32,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:32,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:37,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:37,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:37,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 04:50:37,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:50:37,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:50:37,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:37,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:50:37,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:37,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:50:37,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:37,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:37,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:37,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:37,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:37,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:37,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:50:37,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:37,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:37,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:37,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:37,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-13 04:50:37,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940179511] [2020-10-13 04:50:37,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:37,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:50:37,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745255069] [2020-10-13 04:50:37,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:50:37,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:37,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:50:37,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:50:37,981 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 10 states. [2020-10-13 04:50:38,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:38,108 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-10-13 04:50:38,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:50:38,108 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-13 04:50:38,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:38,109 INFO L225 Difference]: With dead ends: 70 [2020-10-13 04:50:38,109 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 04:50:38,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:50:38,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 04:50:38,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-13 04:50:38,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 04:50:38,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-10-13 04:50:38,120 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 35 [2020-10-13 04:50:38,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:38,120 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-10-13 04:50:38,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:50:38,120 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-10-13 04:50:38,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 04:50:38,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:38,122 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:38,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:50:38,123 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:38,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:38,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1474050655, now seen corresponding path program 7 times [2020-10-13 04:50:38,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:38,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723706341] [2020-10-13 04:50:38,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:38,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:38,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:38,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:38,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:43,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:43,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 04:50:43,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:50:43,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:50:43,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:43,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:50:43,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:43,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 04:50:43,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:43,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:43,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:43,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:43,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:43,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:43,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:43,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:43,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:43,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:43,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:43,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-13 04:50:43,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723706341] [2020-10-13 04:50:43,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:43,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:50:43,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448835512] [2020-10-13 04:50:43,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:50:43,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:43,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:50:43,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:50:43,261 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 11 states. [2020-10-13 04:50:43,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:43,366 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2020-10-13 04:50:43,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:50:43,367 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-10-13 04:50:43,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:43,368 INFO L225 Difference]: With dead ends: 75 [2020-10-13 04:50:43,368 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 04:50:43,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:50:43,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 04:50:43,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-13 04:50:43,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 04:50:43,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-10-13 04:50:43,374 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 38 [2020-10-13 04:50:43,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:43,375 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-10-13 04:50:43,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:50:43,375 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-10-13 04:50:43,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 04:50:43,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:43,376 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:43,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:50:43,377 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:43,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:43,377 INFO L82 PathProgramCache]: Analyzing trace with hash 2136639930, now seen corresponding path program 8 times [2020-10-13 04:50:43,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:43,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638877543] [2020-10-13 04:50:43,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:43,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:43,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:43,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:48,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:48,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 04:50:48,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:50:48,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:50:48,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:48,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:50:48,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 04:50:48,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:50:48,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:48,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:48,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:48,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:48,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:48,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:48,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:48,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:48,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:48,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:48,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:48,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:48,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-13 04:50:48,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638877543] [2020-10-13 04:50:48,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:48,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:50:48,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357686983] [2020-10-13 04:50:48,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:50:48,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:48,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:50:48,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:50:48,513 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 12 states. [2020-10-13 04:50:48,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:48,639 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2020-10-13 04:50:48,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:50:48,639 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-10-13 04:50:48,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:48,640 INFO L225 Difference]: With dead ends: 80 [2020-10-13 04:50:48,640 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 04:50:48,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:50:48,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 04:50:48,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-13 04:50:48,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 04:50:48,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-10-13 04:50:48,650 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 41 [2020-10-13 04:50:48,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:48,652 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-10-13 04:50:48,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:50:48,653 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-10-13 04:50:48,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 04:50:48,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:48,654 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:48,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:50:48,654 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:48,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:48,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1548858751, now seen corresponding path program 9 times [2020-10-13 04:50:48,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:48,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862164726] [2020-10-13 04:50:48,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:48,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:48,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:48,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:53,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:53,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 04:50:53,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:50:53,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:50:53,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:53,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:50:53,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 04:50:53,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 04:50:53,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:53,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:53,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:53,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:53,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:53,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:53,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:50:53,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:53,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:53,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:53,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:53,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-10-13 04:50:53,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862164726] [2020-10-13 04:50:53,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:53,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:50:53,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642701019] [2020-10-13 04:50:53,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:50:53,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:53,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:50:53,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:50:53,788 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 13 states. [2020-10-13 04:50:53,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:53,900 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2020-10-13 04:50:53,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:50:53,900 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2020-10-13 04:50:53,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:53,901 INFO L225 Difference]: With dead ends: 85 [2020-10-13 04:50:53,901 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 04:50:53,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:50:53,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 04:50:53,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-13 04:50:53,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 04:50:53,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-10-13 04:50:53,912 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 44 [2020-10-13 04:50:53,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:53,912 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-10-13 04:50:53,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:50:53,913 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-10-13 04:50:53,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 04:50:53,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:53,914 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:53,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:50:53,914 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:53,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:53,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1397676122, now seen corresponding path program 10 times [2020-10-13 04:50:53,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:53,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157263594] [2020-10-13 04:50:53,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:53,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:53,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:54,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:58,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:58,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 04:50:58,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:50:58,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:50:58,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:58,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:50:58,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 04:50:58,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:50:58,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:59,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:59,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:59,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:59,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:59,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:59,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:59,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:59,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:59,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:59,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:59,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-10-13 04:50:59,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157263594] [2020-10-13 04:50:59,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:59,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:50:59,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558815195] [2020-10-13 04:50:59,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:50:59,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:59,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:50:59,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:50:59,075 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 14 states. [2020-10-13 04:50:59,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:59,176 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2020-10-13 04:50:59,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:50:59,176 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-10-13 04:50:59,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:59,177 INFO L225 Difference]: With dead ends: 90 [2020-10-13 04:50:59,177 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 04:50:59,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:50:59,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 04:50:59,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-13 04:50:59,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 04:50:59,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-10-13 04:50:59,183 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 47 [2020-10-13 04:50:59,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:59,184 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-10-13 04:50:59,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:50:59,184 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-10-13 04:50:59,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 04:50:59,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:59,185 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:59,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:50:59,185 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:59,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:59,186 INFO L82 PathProgramCache]: Analyzing trace with hash -110123167, now seen corresponding path program 11 times [2020-10-13 04:50:59,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:59,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801532935] [2020-10-13 04:50:59,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:59,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:59,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:59,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:59,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:04,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:04,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 04:51:04,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:51:04,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:51:04,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:04,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:51:04,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 04:51:04,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 04:51:04,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:04,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:04,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:04,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:04,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:04,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:04,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:04,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:04,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:04,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:04,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:04,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-13 04:51:04,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801532935] [2020-10-13 04:51:04,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:04,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:51:04,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745751666] [2020-10-13 04:51:04,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:51:04,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:04,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:51:04,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:51:04,338 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 15 states. [2020-10-13 04:51:04,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:04,477 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2020-10-13 04:51:04,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:51:04,477 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2020-10-13 04:51:04,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:04,478 INFO L225 Difference]: With dead ends: 95 [2020-10-13 04:51:04,478 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 04:51:04,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:51:04,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 04:51:04,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-13 04:51:04,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 04:51:04,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-10-13 04:51:04,485 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 50 [2020-10-13 04:51:04,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:04,486 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-10-13 04:51:04,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:51:04,486 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-10-13 04:51:04,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 04:51:04,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:04,487 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:04,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:51:04,487 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:04,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:04,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1531998470, now seen corresponding path program 12 times [2020-10-13 04:51:04,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:04,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482613369] [2020-10-13 04:51:04,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:04,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:04,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:04,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:04,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:09,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:09,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 04:51:09,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:51:09,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:51:09,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:09,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:51:09,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:09,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:51:09,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:09,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:09,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:09,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:09,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:09,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:09,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:09,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:09,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:09,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:09,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:09,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:09,650 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2020-10-13 04:51:09,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482613369] [2020-10-13 04:51:09,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:09,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:51:09,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897519993] [2020-10-13 04:51:09,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:51:09,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:09,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:51:09,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:51:09,653 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 16 states. [2020-10-13 04:51:09,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:09,806 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2020-10-13 04:51:09,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:51:09,807 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 53 [2020-10-13 04:51:09,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:09,808 INFO L225 Difference]: With dead ends: 100 [2020-10-13 04:51:09,808 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 04:51:09,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:51:09,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 04:51:09,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-13 04:51:09,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 04:51:09,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-10-13 04:51:09,815 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 53 [2020-10-13 04:51:09,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:09,815 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-10-13 04:51:09,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:51:09,815 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-10-13 04:51:09,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 04:51:09,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:09,816 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:09,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:51:09,817 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:09,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:09,817 INFO L82 PathProgramCache]: Analyzing trace with hash -420881343, now seen corresponding path program 13 times [2020-10-13 04:51:09,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:09,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23815768] [2020-10-13 04:51:09,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:09,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:09,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:09,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:14,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:14,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 04:51:14,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:51:14,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:51:14,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:14,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:51:14,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:14,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 04:51:14,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:14,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:14,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:14,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:14,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:14,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:14,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:14,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:14,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:14,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:14,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:14,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-10-13 04:51:14,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23815768] [2020-10-13 04:51:14,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:14,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:51:14,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459474637] [2020-10-13 04:51:14,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:51:14,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:14,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:51:14,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:51:14,995 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 17 states. [2020-10-13 04:51:15,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:15,181 INFO L93 Difference]: Finished difference Result 105 states and 113 transitions. [2020-10-13 04:51:15,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:51:15,181 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 56 [2020-10-13 04:51:15,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:15,182 INFO L225 Difference]: With dead ends: 105 [2020-10-13 04:51:15,182 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 04:51:15,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:51:15,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 04:51:15,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-13 04:51:15,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 04:51:15,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2020-10-13 04:51:15,190 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 56 [2020-10-13 04:51:15,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:15,190 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2020-10-13 04:51:15,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:51:15,191 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2020-10-13 04:51:15,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 04:51:15,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:15,191 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:15,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:51:15,192 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:15,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:15,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1004884582, now seen corresponding path program 14 times [2020-10-13 04:51:15,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:15,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584771527] [2020-10-13 04:51:15,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:15,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:15,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:15,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:15,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:20,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:20,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 04:51:20,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:51:20,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:51:20,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:20,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:51:20,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 04:51:20,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:51:20,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:20,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:20,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:20,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:20,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:20,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:20,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:20,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:20,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:20,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:20,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:20,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:20,382 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 04:51:20,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584771527] [2020-10-13 04:51:20,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:20,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:51:20,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502147366] [2020-10-13 04:51:20,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:51:20,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:20,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:51:20,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:51:20,388 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 18 states. [2020-10-13 04:51:20,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:20,522 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2020-10-13 04:51:20,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:51:20,522 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-10-13 04:51:20,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:20,523 INFO L225 Difference]: With dead ends: 110 [2020-10-13 04:51:20,523 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 04:51:20,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:51:20,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 04:51:20,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-13 04:51:20,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 04:51:20,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-10-13 04:51:20,531 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 59 [2020-10-13 04:51:20,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:20,532 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-10-13 04:51:20,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:51:20,532 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-10-13 04:51:20,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 04:51:20,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:20,533 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:20,533 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:51:20,533 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:20,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:20,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1390483167, now seen corresponding path program 15 times [2020-10-13 04:51:20,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:20,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586469779] [2020-10-13 04:51:20,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:20,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:20,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:20,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:25,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:25,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 04:51:25,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:51:25,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:51:25,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:25,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:51:25,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:25,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 04:51:25,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:25,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:25,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:25,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:25,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:25,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:25,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:25,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:25,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:25,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:25,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:25,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:25,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:51:25,793 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2020-10-13 04:51:25,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586469779] [2020-10-13 04:51:25,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:25,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:51:25,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66990565] [2020-10-13 04:51:25,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:51:25,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:25,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:51:25,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:51:25,797 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 19 states. [2020-10-13 04:51:26,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:26,008 INFO L93 Difference]: Finished difference Result 115 states and 123 transitions. [2020-10-13 04:51:26,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:51:26,009 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 62 [2020-10-13 04:51:26,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:26,010 INFO L225 Difference]: With dead ends: 115 [2020-10-13 04:51:26,010 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 04:51:26,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:51:26,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 04:51:26,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-13 04:51:26,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 04:51:26,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2020-10-13 04:51:26,028 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 62 [2020-10-13 04:51:26,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:26,029 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2020-10-13 04:51:26,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:51:26,032 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2020-10-13 04:51:26,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 04:51:26,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:26,033 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:26,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:51:26,034 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:26,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:26,037 INFO L82 PathProgramCache]: Analyzing trace with hash 2125345850, now seen corresponding path program 16 times [2020-10-13 04:51:26,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:26,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774990530] [2020-10-13 04:51:26,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:26,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:26,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:26,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:31,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:31,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 04:51:31,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:51:31,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:51:31,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:31,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:51:31,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 04:51:31,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:51:31,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:31,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:31,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:31,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:31,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:31,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:31,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:31,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:31,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:31,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:31,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:31,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2020-10-13 04:51:31,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774990530] [2020-10-13 04:51:31,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:31,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:51:31,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335348898] [2020-10-13 04:51:31,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:51:31,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:31,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:51:31,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:51:31,317 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand 20 states. [2020-10-13 04:51:31,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:31,521 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2020-10-13 04:51:31,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:51:31,521 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 65 [2020-10-13 04:51:31,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:31,522 INFO L225 Difference]: With dead ends: 120 [2020-10-13 04:51:31,522 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 04:51:31,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:51:31,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 04:51:31,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-13 04:51:31,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 04:51:31,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-10-13 04:51:31,532 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 65 [2020-10-13 04:51:31,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:31,532 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-10-13 04:51:31,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:51:31,533 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-10-13 04:51:31,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 04:51:31,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:31,535 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:31,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:51:31,535 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:31,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:31,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1332687359, now seen corresponding path program 17 times [2020-10-13 04:51:31,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:31,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102815716] [2020-10-13 04:51:31,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:31,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:31,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:31,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:36,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:36,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 04:51:36,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:51:36,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:51:36,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:36,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:51:36,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:36,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 04:51:36,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:36,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:36,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:36,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:36,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:36,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:36,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:36,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:36,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:36,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:36,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:36,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:36,788 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2020-10-13 04:51:36,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102815716] [2020-10-13 04:51:36,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:36,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:51:36,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66603442] [2020-10-13 04:51:36,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:51:36,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:36,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:51:36,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:51:36,793 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 21 states. [2020-10-13 04:51:37,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:37,000 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2020-10-13 04:51:37,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:51:37,000 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 68 [2020-10-13 04:51:37,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:37,002 INFO L225 Difference]: With dead ends: 125 [2020-10-13 04:51:37,002 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 04:51:37,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:51:37,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 04:51:37,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-13 04:51:37,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 04:51:37,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2020-10-13 04:51:37,009 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 68 [2020-10-13 04:51:37,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:37,010 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2020-10-13 04:51:37,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:51:37,010 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2020-10-13 04:51:37,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 04:51:37,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:37,011 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:37,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:51:37,011 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:37,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:37,012 INFO L82 PathProgramCache]: Analyzing trace with hash -33021222, now seen corresponding path program 18 times [2020-10-13 04:51:37,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:37,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750470709] [2020-10-13 04:51:37,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:37,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:37,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:37,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:42,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:42,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 04:51:42,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:51:42,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:51:42,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:42,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:51:42,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:42,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:51:42,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:42,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:42,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:42,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:42,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:42,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:42,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:42,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:42,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:42,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:42,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:42,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2020-10-13 04:51:42,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750470709] [2020-10-13 04:51:42,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:42,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:51:42,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104772102] [2020-10-13 04:51:42,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:51:42,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:42,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:51:42,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:51:42,280 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand 22 states. [2020-10-13 04:51:42,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:42,409 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2020-10-13 04:51:42,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:51:42,409 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 71 [2020-10-13 04:51:42,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:42,410 INFO L225 Difference]: With dead ends: 130 [2020-10-13 04:51:42,410 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 04:51:42,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:51:42,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 04:51:42,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-13 04:51:42,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 04:51:42,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-10-13 04:51:42,415 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 71 [2020-10-13 04:51:42,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:42,415 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-10-13 04:51:42,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:51:42,416 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-10-13 04:51:42,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 04:51:42,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:42,416 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:42,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:51:42,417 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:42,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:42,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1723757855, now seen corresponding path program 19 times [2020-10-13 04:51:42,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:42,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631608589] [2020-10-13 04:51:42,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:42,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:42,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:42,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:47,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:47,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 04:51:47,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:51:47,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:51:47,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:47,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:51:47,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:47,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 04:51:47,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:47,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:47,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:47,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:47,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:47,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:47,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:47,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:47,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:47,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:47,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:47,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2020-10-13 04:51:47,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631608589] [2020-10-13 04:51:47,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:47,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:51:47,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150829888] [2020-10-13 04:51:47,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:51:47,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:47,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:51:47,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:51:47,712 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 23 states. [2020-10-13 04:51:47,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:47,919 INFO L93 Difference]: Finished difference Result 135 states and 143 transitions. [2020-10-13 04:51:47,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:51:47,920 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 74 [2020-10-13 04:51:47,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:47,921 INFO L225 Difference]: With dead ends: 135 [2020-10-13 04:51:47,921 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 04:51:47,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:51:47,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 04:51:47,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-13 04:51:47,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 04:51:47,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-10-13 04:51:47,932 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 74 [2020-10-13 04:51:47,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:47,933 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-10-13 04:51:47,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:51:47,933 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-10-13 04:51:47,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 04:51:47,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:47,933 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:47,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:51:47,934 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:47,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:47,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1471776390, now seen corresponding path program 20 times [2020-10-13 04:51:47,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:47,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444907985] [2020-10-13 04:51:47,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:47,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:47,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:48,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:48,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:52,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:52,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 04:51:52,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:51:52,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:51:52,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:52,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:51:52,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 04:51:52,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:51:52,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:53,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:53,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:53,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:53,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:53,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:53,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:53,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:53,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:53,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:53,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:53,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:53,251 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-10-13 04:51:53,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444907985] [2020-10-13 04:51:53,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:53,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:51:53,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126336943] [2020-10-13 04:51:53,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:51:53,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:53,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:51:53,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:51:53,256 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 24 states. [2020-10-13 04:51:53,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:53,428 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2020-10-13 04:51:53,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:51:53,431 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 77 [2020-10-13 04:51:53,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:53,432 INFO L225 Difference]: With dead ends: 140 [2020-10-13 04:51:53,432 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 04:51:53,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:51:53,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 04:51:53,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-13 04:51:53,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 04:51:53,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-10-13 04:51:53,438 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 77 [2020-10-13 04:51:53,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:53,438 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-10-13 04:51:53,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:51:53,438 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-10-13 04:51:53,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 04:51:53,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:53,439 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:53,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:51:53,439 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:53,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:53,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1924341697, now seen corresponding path program 21 times [2020-10-13 04:51:53,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:53,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520397094] [2020-10-13 04:51:53,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:53,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:53,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:53,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:58,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:58,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 04:51:58,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:51:58,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:51:58,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:58,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:51:58,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-13 04:51:58,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 04:51:58,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:58,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:58,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:58,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:58,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:58,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:58,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:58,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:58,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:58,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:58,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:58,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:58,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:58,766 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2020-10-13 04:51:58,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520397094] [2020-10-13 04:51:58,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:58,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:51:58,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419409238] [2020-10-13 04:51:58,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:51:58,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:58,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:51:58,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:51:58,768 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 25 states. [2020-10-13 04:51:58,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:58,930 INFO L93 Difference]: Finished difference Result 145 states and 153 transitions. [2020-10-13 04:51:58,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:51:58,930 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 80 [2020-10-13 04:51:58,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:58,931 INFO L225 Difference]: With dead ends: 145 [2020-10-13 04:51:58,931 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 04:51:58,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:51:58,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 04:51:58,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-13 04:51:58,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 04:51:58,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2020-10-13 04:51:58,937 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 80 [2020-10-13 04:51:58,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:58,937 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2020-10-13 04:51:58,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:51:58,938 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2020-10-13 04:51:58,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 04:51:58,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:58,941 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:58,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:51:58,941 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:58,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:58,942 INFO L82 PathProgramCache]: Analyzing trace with hash 473114, now seen corresponding path program 22 times [2020-10-13 04:51:58,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:58,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100701727] [2020-10-13 04:51:58,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:58,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:59,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:03,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:03,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 04:52:03,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:03,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:52:03,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:03,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:52:03,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 04:52:03,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:52:03,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:04,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:04,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:04,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:04,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:04,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:04,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:04,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:04,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:04,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:04,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:04,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:04,304 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2020-10-13 04:52:04,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100701727] [2020-10-13 04:52:04,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:04,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:52:04,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353604551] [2020-10-13 04:52:04,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:52:04,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:04,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:52:04,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:52:04,305 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand 26 states. [2020-10-13 04:52:04,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:04,526 INFO L93 Difference]: Finished difference Result 150 states and 158 transitions. [2020-10-13 04:52:04,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:52:04,527 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 83 [2020-10-13 04:52:04,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:04,528 INFO L225 Difference]: With dead ends: 150 [2020-10-13 04:52:04,528 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 04:52:04,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:52:04,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 04:52:04,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-13 04:52:04,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 04:52:04,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-10-13 04:52:04,534 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 83 [2020-10-13 04:52:04,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:04,534 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-10-13 04:52:04,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:52:04,534 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-10-13 04:52:04,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 04:52:04,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:04,535 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:04,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:52:04,536 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:04,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:04,536 INFO L82 PathProgramCache]: Analyzing trace with hash -874017631, now seen corresponding path program 23 times [2020-10-13 04:52:04,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:04,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949289031] [2020-10-13 04:52:04,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:04,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:04,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:09,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:09,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 04:52:09,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:09,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:52:09,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:09,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:52:09,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 04:52:09,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 04:52:09,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:09,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:09,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:09,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:09,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:09,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:09,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:09,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:09,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:09,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:09,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:09,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2020-10-13 04:52:09,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949289031] [2020-10-13 04:52:09,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:09,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:52:09,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590396072] [2020-10-13 04:52:09,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:52:09,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:09,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:52:09,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:52:09,961 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand 27 states. [2020-10-13 04:52:10,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:10,182 INFO L93 Difference]: Finished difference Result 155 states and 163 transitions. [2020-10-13 04:52:10,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:52:10,185 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 86 [2020-10-13 04:52:10,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:10,186 INFO L225 Difference]: With dead ends: 155 [2020-10-13 04:52:10,186 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 04:52:10,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:52:10,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 04:52:10,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-13 04:52:10,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 04:52:10,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2020-10-13 04:52:10,196 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 86 [2020-10-13 04:52:10,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:10,197 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2020-10-13 04:52:10,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:52:10,198 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2020-10-13 04:52:10,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 04:52:10,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:10,199 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:10,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:52:10,199 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:10,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:10,200 INFO L82 PathProgramCache]: Analyzing trace with hash -2073534790, now seen corresponding path program 24 times [2020-10-13 04:52:10,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:10,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714316612] [2020-10-13 04:52:10,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:10,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:10,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:10,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:15,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:15,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 04:52:15,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:15,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 04:52:15,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:15,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:52:15,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:52:15,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:52:15,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:15,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:15,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:15,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:15,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:15,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:15,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:15,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:15,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:15,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:15,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:15,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-10-13 04:52:15,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714316612] [2020-10-13 04:52:15,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:15,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:52:15,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810813017] [2020-10-13 04:52:15,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:52:15,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:15,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:52:15,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:52:15,617 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand 28 states. [2020-10-13 04:52:15,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:15,864 INFO L93 Difference]: Finished difference Result 160 states and 168 transitions. [2020-10-13 04:52:15,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:52:15,864 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 89 [2020-10-13 04:52:15,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:15,865 INFO L225 Difference]: With dead ends: 160 [2020-10-13 04:52:15,865 INFO L226 Difference]: Without dead ends: 97 [2020-10-13 04:52:15,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:52:15,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-13 04:52:15,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-13 04:52:15,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 04:52:15,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-10-13 04:52:15,871 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 89 [2020-10-13 04:52:15,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:15,872 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-10-13 04:52:15,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:52:15,872 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-10-13 04:52:15,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 04:52:15,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:15,873 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:15,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:52:15,873 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:15,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:15,874 INFO L82 PathProgramCache]: Analyzing trace with hash -681520767, now seen corresponding path program 25 times [2020-10-13 04:52:15,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:15,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38032810] [2020-10-13 04:52:15,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:15,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:15,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:20,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:20,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 04:52:20,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:20,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:52:20,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:20,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 04:52:20,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:52:20,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 04:52:20,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:21,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:21,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:21,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:21,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:21,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:21,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:52:21,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:21,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:21,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:21,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:21,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:52:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2020-10-13 04:52:21,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38032810] [2020-10-13 04:52:21,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:21,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:52:21,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585026769] [2020-10-13 04:52:21,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:52:21,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:21,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:52:21,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:52:21,326 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 29 states. [2020-10-13 04:52:21,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:21,569 INFO L93 Difference]: Finished difference Result 165 states and 173 transitions. [2020-10-13 04:52:21,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:52:21,570 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 92 [2020-10-13 04:52:21,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:21,571 INFO L225 Difference]: With dead ends: 165 [2020-10-13 04:52:21,571 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 04:52:21,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:52:21,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 04:52:21,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-13 04:52:21,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 04:52:21,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2020-10-13 04:52:21,579 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 92 [2020-10-13 04:52:21,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:21,579 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2020-10-13 04:52:21,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:52:21,579 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2020-10-13 04:52:21,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 04:52:21,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:21,581 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:21,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:52:21,582 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:21,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:21,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1861751462, now seen corresponding path program 26 times [2020-10-13 04:52:21,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:21,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640029651] [2020-10-13 04:52:21,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:21,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:21,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:26,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:26,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 04:52:26,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:26,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 04:52:26,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:26,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:52:26,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 04:52:26,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:52:26,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:27,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:27,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:27,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:27,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:27,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:27,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:27,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:27,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:27,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:27,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:27,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:27,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2020-10-13 04:52:27,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640029651] [2020-10-13 04:52:27,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:27,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 04:52:27,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746355996] [2020-10-13 04:52:27,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 04:52:27,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:27,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 04:52:27,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:52:27,030 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand 30 states. [2020-10-13 04:52:27,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:27,316 INFO L93 Difference]: Finished difference Result 170 states and 178 transitions. [2020-10-13 04:52:27,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 04:52:27,317 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 95 [2020-10-13 04:52:27,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:27,318 INFO L225 Difference]: With dead ends: 170 [2020-10-13 04:52:27,318 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 04:52:27,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:52:27,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 04:52:27,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-13 04:52:27,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 04:52:27,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2020-10-13 04:52:27,326 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 95 [2020-10-13 04:52:27,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:27,326 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2020-10-13 04:52:27,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 04:52:27,327 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2020-10-13 04:52:27,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 04:52:27,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:27,328 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:27,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:52:27,328 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:27,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:27,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1960776095, now seen corresponding path program 27 times [2020-10-13 04:52:27,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:27,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754977471] [2020-10-13 04:52:27,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:27,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:27,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:27,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:32,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:32,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 04:52:32,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:32,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:52:32,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:32,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 04:52:32,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:52:32,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 04:52:32,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:32,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:32,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:32,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:32,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:32,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:32,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:32,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:32,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:32,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:32,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:32,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2020-10-13 04:52:32,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754977471] [2020-10-13 04:52:32,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:32,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:52:32,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911163515] [2020-10-13 04:52:32,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:52:32,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:32,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:52:32,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:52:32,863 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand 31 states. [2020-10-13 04:52:33,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:33,095 INFO L93 Difference]: Finished difference Result 175 states and 183 transitions. [2020-10-13 04:52:33,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:52:33,098 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 98 [2020-10-13 04:52:33,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:33,099 INFO L225 Difference]: With dead ends: 175 [2020-10-13 04:52:33,099 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 04:52:33,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:52:33,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 04:52:33,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-13 04:52:33,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 04:52:33,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2020-10-13 04:52:33,104 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 98 [2020-10-13 04:52:33,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:33,105 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2020-10-13 04:52:33,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:52:33,105 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2020-10-13 04:52:33,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 04:52:33,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:33,106 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:33,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:52:33,106 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:33,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:33,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1040442362, now seen corresponding path program 28 times [2020-10-13 04:52:33,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:33,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644402563] [2020-10-13 04:52:33,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:33,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:33,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:38,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:38,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 04:52:38,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:38,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 04:52:38,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:38,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 04:52:38,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 04:52:38,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:52:38,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:38,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:38,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:38,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:38,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:38,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:38,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:38,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:38,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:38,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:38,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:38,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:38,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2020-10-13 04:52:38,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644402563] [2020-10-13 04:52:38,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:38,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 04:52:38,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89585077] [2020-10-13 04:52:38,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 04:52:38,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:38,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 04:52:38,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:52:38,638 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand 32 states. [2020-10-13 04:52:38,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:38,856 INFO L93 Difference]: Finished difference Result 180 states and 188 transitions. [2020-10-13 04:52:38,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 04:52:38,857 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 101 [2020-10-13 04:52:38,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:38,858 INFO L225 Difference]: With dead ends: 180 [2020-10-13 04:52:38,858 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 04:52:38,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:52:38,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 04:52:38,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-13 04:52:38,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 04:52:38,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2020-10-13 04:52:38,865 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 101 [2020-10-13 04:52:38,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:38,866 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2020-10-13 04:52:38,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 04:52:38,866 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2020-10-13 04:52:38,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 04:52:38,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:38,867 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:38,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:52:38,867 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:38,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:38,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1062608063, now seen corresponding path program 29 times [2020-10-13 04:52:38,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:38,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770756472] [2020-10-13 04:52:38,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:38,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:38,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:43,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:43,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 04:52:43,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:43,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:52:43,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:43,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:52:43,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 04:52:43,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 04:52:43,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:44,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:44,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:44,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:44,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:44,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:44,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:44,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:44,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:44,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:44,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:44,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:44,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2020-10-13 04:52:44,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770756472] [2020-10-13 04:52:44,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:44,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:52:44,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142455305] [2020-10-13 04:52:44,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:52:44,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:44,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:52:44,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:52:44,428 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand 33 states. [2020-10-13 04:52:44,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:44,649 INFO L93 Difference]: Finished difference Result 185 states and 193 transitions. [2020-10-13 04:52:44,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 04:52:44,657 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 104 [2020-10-13 04:52:44,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:44,658 INFO L225 Difference]: With dead ends: 185 [2020-10-13 04:52:44,658 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 04:52:44,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:52:44,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 04:52:44,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-13 04:52:44,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 04:52:44,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2020-10-13 04:52:44,666 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 104 [2020-10-13 04:52:44,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:44,667 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2020-10-13 04:52:44,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:52:44,667 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2020-10-13 04:52:44,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 04:52:44,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:44,668 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:44,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:52:44,668 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:44,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:44,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1073365658, now seen corresponding path program 30 times [2020-10-13 04:52:44,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:44,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803824608] [2020-10-13 04:52:44,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:44,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:44,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:49,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:49,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 04:52:49,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:49,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 04:52:49,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:49,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 04:52:49,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 04:52:49,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:52:49,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:50,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:50,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:50,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:50,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:50,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:50,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:50,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:50,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:50,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:50,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:50,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:50,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2020-10-13 04:52:50,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803824608] [2020-10-13 04:52:50,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:50,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 04:52:50,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921605660] [2020-10-13 04:52:50,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 04:52:50,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:50,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 04:52:50,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:52:50,216 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand 34 states. [2020-10-13 04:52:50,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:50,517 INFO L93 Difference]: Finished difference Result 190 states and 198 transitions. [2020-10-13 04:52:50,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 04:52:50,518 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 107 [2020-10-13 04:52:50,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:50,519 INFO L225 Difference]: With dead ends: 190 [2020-10-13 04:52:50,519 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 04:52:50,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:52:50,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 04:52:50,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-13 04:52:50,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-13 04:52:50,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2020-10-13 04:52:50,527 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 107 [2020-10-13 04:52:50,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:50,527 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2020-10-13 04:52:50,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 04:52:50,528 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2020-10-13 04:52:50,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-13 04:52:50,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:50,529 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:50,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:52:50,529 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:50,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:50,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1425911841, now seen corresponding path program 31 times [2020-10-13 04:52:50,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:50,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079458444] [2020-10-13 04:52:50,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:50,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:50,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:50,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:55,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:55,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-13 04:52:55,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:55,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 04:52:55,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:55,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 04:52:55,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 04:52:55,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 04:52:55,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:56,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:56,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:56,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:56,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:56,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:56,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:52:56,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:56,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:56,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:56,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:56,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:52:56,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2020-10-13 04:52:56,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079458444] [2020-10-13 04:52:56,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:56,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 04:52:56,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319700120] [2020-10-13 04:52:56,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 04:52:56,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:56,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 04:52:56,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:52:56,256 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand 35 states. [2020-10-13 04:52:56,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:56,553 INFO L93 Difference]: Finished difference Result 195 states and 203 transitions. [2020-10-13 04:52:56,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 04:52:56,555 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 110 [2020-10-13 04:52:56,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:56,557 INFO L225 Difference]: With dead ends: 195 [2020-10-13 04:52:56,558 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 04:52:56,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:52:56,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 04:52:56,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-10-13 04:52:56,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 04:52:56,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2020-10-13 04:52:56,573 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 110 [2020-10-13 04:52:56,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:56,573 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2020-10-13 04:52:56,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 04:52:56,574 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2020-10-13 04:52:56,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 04:52:56,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:56,577 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:56,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:52:56,578 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:56,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:56,578 INFO L82 PathProgramCache]: Analyzing trace with hash -938931910, now seen corresponding path program 32 times [2020-10-13 04:52:56,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:56,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913038887] [2020-10-13 04:52:56,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:56,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:56,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:01,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:01,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 04:53:01,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:01,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:53:01,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:01,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 04:53:01,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 04:53:01,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:53:01,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:02,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:02,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:02,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:02,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:02,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:02,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:02,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:02,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:02,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:02,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:02,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2020-10-13 04:53:02,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913038887] [2020-10-13 04:53:02,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:02,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 04:53:02,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73584730] [2020-10-13 04:53:02,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 04:53:02,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:02,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 04:53:02,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:53:02,306 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand 36 states. [2020-10-13 04:53:02,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:02,645 INFO L93 Difference]: Finished difference Result 200 states and 208 transitions. [2020-10-13 04:53:02,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 04:53:02,646 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 113 [2020-10-13 04:53:02,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:02,647 INFO L225 Difference]: With dead ends: 200 [2020-10-13 04:53:02,647 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 04:53:02,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:53:02,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 04:53:02,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-13 04:53:02,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-13 04:53:02,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2020-10-13 04:53:02,666 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 113 [2020-10-13 04:53:02,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:02,666 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2020-10-13 04:53:02,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 04:53:02,667 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2020-10-13 04:53:02,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 04:53:02,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:02,668 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:02,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:53:02,671 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:02,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:02,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1218336001, now seen corresponding path program 33 times [2020-10-13 04:53:02,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:02,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81447359] [2020-10-13 04:53:02,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:02,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:02,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:07,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:07,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 04:53:07,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:07,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:53:07,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:07,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 04:53:07,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-13 04:53:07,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 04:53:07,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:08,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:08,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:08,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:08,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:08,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:08,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:08,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:08,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:08,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:08,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:08,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:08,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:08,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2020-10-13 04:53:08,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81447359] [2020-10-13 04:53:08,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:08,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 04:53:08,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848457340] [2020-10-13 04:53:08,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 04:53:08,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:08,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 04:53:08,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:53:08,344 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand 37 states. [2020-10-13 04:53:08,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:08,691 INFO L93 Difference]: Finished difference Result 205 states and 213 transitions. [2020-10-13 04:53:08,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 04:53:08,692 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 116 [2020-10-13 04:53:08,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:08,693 INFO L225 Difference]: With dead ends: 205 [2020-10-13 04:53:08,693 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 04:53:08,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:53:08,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 04:53:08,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-13 04:53:08,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 04:53:08,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2020-10-13 04:53:08,700 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 116 [2020-10-13 04:53:08,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:08,701 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2020-10-13 04:53:08,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 04:53:08,701 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2020-10-13 04:53:08,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 04:53:08,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:08,702 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:08,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:53:08,702 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:08,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:08,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1674459098, now seen corresponding path program 34 times [2020-10-13 04:53:08,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:08,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446652587] [2020-10-13 04:53:08,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:08,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:08,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:13,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:13,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 04:53:13,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:13,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 04:53:13,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:13,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 04:53:13,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 04:53:13,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:53:13,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:14,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:14,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:14,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:14,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:14,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:14,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:14,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:14,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:14,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:14,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:14,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2020-10-13 04:53:14,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446652587] [2020-10-13 04:53:14,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:14,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 04:53:14,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611645600] [2020-10-13 04:53:14,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 04:53:14,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:14,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 04:53:14,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:53:14,455 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand 38 states. [2020-10-13 04:53:14,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:14,776 INFO L93 Difference]: Finished difference Result 210 states and 218 transitions. [2020-10-13 04:53:14,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 04:53:14,777 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 119 [2020-10-13 04:53:14,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:14,778 INFO L225 Difference]: With dead ends: 210 [2020-10-13 04:53:14,778 INFO L226 Difference]: Without dead ends: 127 [2020-10-13 04:53:14,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:53:14,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-13 04:53:14,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-13 04:53:14,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-13 04:53:14,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2020-10-13 04:53:14,784 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 119 [2020-10-13 04:53:14,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:14,784 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2020-10-13 04:53:14,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 04:53:14,785 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2020-10-13 04:53:14,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 04:53:14,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:14,785 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:14,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:53:14,786 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:14,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:14,786 INFO L82 PathProgramCache]: Analyzing trace with hash -544353823, now seen corresponding path program 35 times [2020-10-13 04:53:14,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:14,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808430270] [2020-10-13 04:53:14,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:14,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:14,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:19,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:19,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 04:53:19,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:19,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 04:53:19,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:19,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 04:53:19,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 04:53:19,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 04:53:19,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:20,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:20,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:20,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:20,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:20,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:20,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:20,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:20,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:20,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:20,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:20,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:20,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2020-10-13 04:53:20,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808430270] [2020-10-13 04:53:20,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:20,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 04:53:20,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283312688] [2020-10-13 04:53:20,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 04:53:20,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:20,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 04:53:20,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:53:20,580 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand 39 states. [2020-10-13 04:53:20,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:20,849 INFO L93 Difference]: Finished difference Result 215 states and 223 transitions. [2020-10-13 04:53:20,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 04:53:20,850 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 122 [2020-10-13 04:53:20,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:20,851 INFO L225 Difference]: With dead ends: 215 [2020-10-13 04:53:20,851 INFO L226 Difference]: Without dead ends: 130 [2020-10-13 04:53:20,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:53:20,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-13 04:53:20,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-13 04:53:20,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 04:53:20,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 133 transitions. [2020-10-13 04:53:20,861 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 133 transitions. Word has length 122 [2020-10-13 04:53:20,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:20,861 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 133 transitions. [2020-10-13 04:53:20,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 04:53:20,862 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 133 transitions. [2020-10-13 04:53:20,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-13 04:53:20,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:20,863 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:20,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:53:20,863 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:20,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:20,864 INFO L82 PathProgramCache]: Analyzing trace with hash -580399494, now seen corresponding path program 36 times [2020-10-13 04:53:20,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:20,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353768817] [2020-10-13 04:53:20,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:20,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:20,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:21,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:25,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:25,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-13 04:53:25,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:25,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 04:53:25,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:25,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 04:53:25,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:53:25,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:53:25,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:26,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:26,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:26,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:26,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:26,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:26,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:26,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:26,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:26,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:26,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:26,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2020-10-13 04:53:26,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353768817] [2020-10-13 04:53:26,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:26,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 04:53:26,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903704509] [2020-10-13 04:53:26,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 04:53:26,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:26,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 04:53:26,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:53:26,707 INFO L87 Difference]: Start difference. First operand 130 states and 133 transitions. Second operand 40 states. [2020-10-13 04:53:27,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:27,152 INFO L93 Difference]: Finished difference Result 220 states and 228 transitions. [2020-10-13 04:53:27,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 04:53:27,152 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 125 [2020-10-13 04:53:27,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:27,153 INFO L225 Difference]: With dead ends: 220 [2020-10-13 04:53:27,154 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 04:53:27,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:53:27,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 04:53:27,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-10-13 04:53:27,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-13 04:53:27,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2020-10-13 04:53:27,161 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 125 [2020-10-13 04:53:27,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:27,161 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2020-10-13 04:53:27,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 04:53:27,161 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2020-10-13 04:53:27,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 04:53:27,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:27,162 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:27,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:53:27,162 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:27,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:27,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1051842879, now seen corresponding path program 37 times [2020-10-13 04:53:27,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:27,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345764202] [2020-10-13 04:53:27,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:27,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:27,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:27,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:32,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:32,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-13 04:53:32,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:32,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 04:53:32,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:32,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 04:53:32,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 04:53:32,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 04:53:32,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:33,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:33,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:33,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:33,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:33,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:33,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:33,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:33,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:33,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:33,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:33,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:33,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2020-10-13 04:53:33,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345764202] [2020-10-13 04:53:33,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:33,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 04:53:33,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856379277] [2020-10-13 04:53:33,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 04:53:33,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:33,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 04:53:33,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:53:33,046 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand 41 states. [2020-10-13 04:53:33,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:33,358 INFO L93 Difference]: Finished difference Result 225 states and 233 transitions. [2020-10-13 04:53:33,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 04:53:33,359 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 128 [2020-10-13 04:53:33,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:33,360 INFO L225 Difference]: With dead ends: 225 [2020-10-13 04:53:33,360 INFO L226 Difference]: Without dead ends: 136 [2020-10-13 04:53:33,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:53:33,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-13 04:53:33,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-10-13 04:53:33,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 04:53:33,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2020-10-13 04:53:33,368 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 128 [2020-10-13 04:53:33,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:33,368 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2020-10-13 04:53:33,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 04:53:33,369 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2020-10-13 04:53:33,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 04:53:33,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:33,370 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:33,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:53:33,370 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:33,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:33,370 INFO L82 PathProgramCache]: Analyzing trace with hash 460573978, now seen corresponding path program 38 times [2020-10-13 04:53:33,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:33,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689140973] [2020-10-13 04:53:33,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:33,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:33,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:38,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:38,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 04:53:38,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:38,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 04:53:38,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:38,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 04:53:38,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:53:38,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:53:38,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:39,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:39,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:39,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:39,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:39,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:39,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:39,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:39,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:39,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:39,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:39,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:39,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2020-10-13 04:53:39,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689140973] [2020-10-13 04:53:39,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:39,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 04:53:39,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340335198] [2020-10-13 04:53:39,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 04:53:39,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:39,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 04:53:39,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:53:39,283 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand 42 states. [2020-10-13 04:53:39,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:39,771 INFO L93 Difference]: Finished difference Result 230 states and 238 transitions. [2020-10-13 04:53:39,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 04:53:39,772 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 131 [2020-10-13 04:53:39,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:39,773 INFO L225 Difference]: With dead ends: 230 [2020-10-13 04:53:39,773 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 04:53:39,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:53:39,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 04:53:39,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-10-13 04:53:39,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-13 04:53:39,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2020-10-13 04:53:39,781 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 131 [2020-10-13 04:53:39,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:39,781 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2020-10-13 04:53:39,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 04:53:39,781 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2020-10-13 04:53:39,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-13 04:53:39,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:39,783 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:39,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:53:39,783 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:39,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:39,783 INFO L82 PathProgramCache]: Analyzing trace with hash 417420193, now seen corresponding path program 39 times [2020-10-13 04:53:39,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:39,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036348935] [2020-10-13 04:53:39,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:39,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:40,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:44,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:44,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-13 04:53:44,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:44,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 04:53:44,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:44,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 04:53:44,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-13 04:53:44,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 04:53:44,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:45,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:45,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:45,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:45,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:45,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:45,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:45,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:45,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:45,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:45,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:45,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:45,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2020-10-13 04:53:45,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036348935] [2020-10-13 04:53:45,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:45,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 04:53:45,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105558754] [2020-10-13 04:53:45,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 04:53:45,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:45,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 04:53:45,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:53:45,707 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand 43 states. [2020-10-13 04:53:46,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:46,044 INFO L93 Difference]: Finished difference Result 235 states and 243 transitions. [2020-10-13 04:53:46,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 04:53:46,044 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 134 [2020-10-13 04:53:46,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:46,045 INFO L225 Difference]: With dead ends: 235 [2020-10-13 04:53:46,046 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 04:53:46,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:53:46,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 04:53:46,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-13 04:53:46,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 04:53:46,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 145 transitions. [2020-10-13 04:53:46,052 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 145 transitions. Word has length 134 [2020-10-13 04:53:46,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:46,053 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 145 transitions. [2020-10-13 04:53:46,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 04:53:46,053 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 145 transitions. [2020-10-13 04:53:46,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 04:53:46,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:46,054 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:46,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:53:46,054 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:46,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:46,055 INFO L82 PathProgramCache]: Analyzing trace with hash 17839034, now seen corresponding path program 40 times [2020-10-13 04:53:46,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:46,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142626190] [2020-10-13 04:53:46,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:46,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:46,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:46,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:51,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:51,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 04:53:51,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:51,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:53:51,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:51,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 04:53:51,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:53:51,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:53:51,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:51,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:51,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:51,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:51,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:51,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:51,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:51,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:51,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:51,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:51,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:51,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2020-10-13 04:53:51,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142626190] [2020-10-13 04:53:51,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:51,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 04:53:51,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844599434] [2020-10-13 04:53:51,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 04:53:51,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:51,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 04:53:51,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 04:53:51,990 INFO L87 Difference]: Start difference. First operand 142 states and 145 transitions. Second operand 44 states. [2020-10-13 04:53:52,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:52,334 INFO L93 Difference]: Finished difference Result 240 states and 248 transitions. [2020-10-13 04:53:52,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 04:53:52,335 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 137 [2020-10-13 04:53:52,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:52,336 INFO L225 Difference]: With dead ends: 240 [2020-10-13 04:53:52,336 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 04:53:52,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 04:53:52,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 04:53:52,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-10-13 04:53:52,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-13 04:53:52,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2020-10-13 04:53:52,345 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 137 [2020-10-13 04:53:52,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:52,345 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2020-10-13 04:53:52,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 04:53:52,345 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2020-10-13 04:53:52,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-13 04:53:52,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:52,347 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:52,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 04:53:52,347 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:52,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:52,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1261873023, now seen corresponding path program 41 times [2020-10-13 04:53:52,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:52,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967712384] [2020-10-13 04:53:52,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:52,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:52,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:57,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:57,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-13 04:53:57,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:57,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 04:53:57,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:57,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 04:53:57,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-13 04:53:57,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 04:53:57,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:58,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:58,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:58,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:58,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:58,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:58,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:53:58,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:58,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:58,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:58,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:58,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2020-10-13 04:53:58,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967712384] [2020-10-13 04:53:58,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:58,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 04:53:58,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017048739] [2020-10-13 04:53:58,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 04:53:58,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:58,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 04:53:58,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 04:53:58,348 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand 45 states. [2020-10-13 04:53:58,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:58,740 INFO L93 Difference]: Finished difference Result 245 states and 253 transitions. [2020-10-13 04:53:58,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 04:53:58,741 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 140 [2020-10-13 04:53:58,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:58,743 INFO L225 Difference]: With dead ends: 245 [2020-10-13 04:53:58,743 INFO L226 Difference]: Without dead ends: 148 [2020-10-13 04:53:58,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 04:53:58,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-13 04:53:58,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2020-10-13 04:53:58,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 04:53:58,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2020-10-13 04:53:58,750 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 140 [2020-10-13 04:53:58,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:58,750 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2020-10-13 04:53:58,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 04:53:58,750 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2020-10-13 04:53:58,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-13 04:53:58,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:58,751 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:58,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 04:53:58,752 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:58,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:58,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1306198618, now seen corresponding path program 42 times [2020-10-13 04:53:58,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:58,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489574253] [2020-10-13 04:53:58,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:58,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:58,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:03,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:03,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-13 04:54:03,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:03,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 04:54:03,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:03,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 04:54:03,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 04:54:03,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:54:03,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:04,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:04,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:04,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:04,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:04,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:04,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:04,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:04,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:04,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:04,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:04,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2709 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 1806 trivial. 0 not checked. [2020-10-13 04:54:04,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489574253] [2020-10-13 04:54:04,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:04,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 04:54:04,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016192661] [2020-10-13 04:54:04,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 04:54:04,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:04,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 04:54:04,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 04:54:04,864 INFO L87 Difference]: Start difference. First operand 148 states and 151 transitions. Second operand 46 states. [2020-10-13 04:54:05,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:05,183 INFO L93 Difference]: Finished difference Result 250 states and 258 transitions. [2020-10-13 04:54:05,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 04:54:05,183 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 143 [2020-10-13 04:54:05,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:05,185 INFO L225 Difference]: With dead ends: 250 [2020-10-13 04:54:05,185 INFO L226 Difference]: Without dead ends: 151 [2020-10-13 04:54:05,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 04:54:05,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-13 04:54:05,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2020-10-13 04:54:05,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-13 04:54:05,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2020-10-13 04:54:05,192 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 143 [2020-10-13 04:54:05,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:05,192 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2020-10-13 04:54:05,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 04:54:05,192 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2020-10-13 04:54:05,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-13 04:54:05,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:05,193 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:05,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 04:54:05,194 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:05,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:05,194 INFO L82 PathProgramCache]: Analyzing trace with hash 654849377, now seen corresponding path program 43 times [2020-10-13 04:54:05,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:05,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147018470] [2020-10-13 04:54:05,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:05,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:05,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:05,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:10,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:10,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-13 04:54:10,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:10,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 04:54:10,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:10,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 04:54:10,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-13 04:54:10,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 04:54:10,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:11,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:11,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:11,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:11,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:11,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:11,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:11,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:11,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:11,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:11,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:11,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:11,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2020-10-13 04:54:11,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147018470] [2020-10-13 04:54:11,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:11,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 04:54:11,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746127603] [2020-10-13 04:54:11,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 04:54:11,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:11,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 04:54:11,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 04:54:11,361 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand 47 states. [2020-10-13 04:54:11,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:11,859 INFO L93 Difference]: Finished difference Result 255 states and 263 transitions. [2020-10-13 04:54:11,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 04:54:11,859 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 146 [2020-10-13 04:54:11,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:11,861 INFO L225 Difference]: With dead ends: 255 [2020-10-13 04:54:11,861 INFO L226 Difference]: Without dead ends: 154 [2020-10-13 04:54:11,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 04:54:11,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-13 04:54:11,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2020-10-13 04:54:11,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-13 04:54:11,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 157 transitions. [2020-10-13 04:54:11,868 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 157 transitions. Word has length 146 [2020-10-13 04:54:11,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:11,869 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 157 transitions. [2020-10-13 04:54:11,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 04:54:11,869 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 157 transitions. [2020-10-13 04:54:11,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-13 04:54:11,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:11,870 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:11,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 04:54:11,870 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:11,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:11,871 INFO L82 PathProgramCache]: Analyzing trace with hash 2113026298, now seen corresponding path program 44 times [2020-10-13 04:54:11,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:11,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933831088] [2020-10-13 04:54:11,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:11,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:11,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:12,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:16,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:16,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-13 04:54:16,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:16,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 04:54:16,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:16,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 04:54:16,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 04:54:16,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 04:54:16,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:18,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:18,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:18,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:18,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:18,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:18,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:18,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:18,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:18,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:18,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:18,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:18,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2020-10-13 04:54:18,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933831088] [2020-10-13 04:54:18,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:18,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 04:54:18,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784428482] [2020-10-13 04:54:18,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 04:54:18,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:18,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 04:54:18,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 04:54:18,038 INFO L87 Difference]: Start difference. First operand 154 states and 157 transitions. Second operand 48 states. [2020-10-13 04:54:18,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:18,528 INFO L93 Difference]: Finished difference Result 260 states and 268 transitions. [2020-10-13 04:54:18,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 04:54:18,528 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 149 [2020-10-13 04:54:18,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:18,530 INFO L225 Difference]: With dead ends: 260 [2020-10-13 04:54:18,530 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 04:54:18,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 04:54:18,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 04:54:18,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2020-10-13 04:54:18,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-13 04:54:18,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2020-10-13 04:54:18,535 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 149 [2020-10-13 04:54:18,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:18,536 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2020-10-13 04:54:18,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 04:54:18,536 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2020-10-13 04:54:18,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-13 04:54:18,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:18,536 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:18,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 04:54:18,537 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:18,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:18,537 INFO L82 PathProgramCache]: Analyzing trace with hash -450893247, now seen corresponding path program 45 times [2020-10-13 04:54:18,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:18,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319091589] [2020-10-13 04:54:18,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:18,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:18,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking...