/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=BIGGEST --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_init9_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:59:06,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:59:06,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:59:06,649 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:59:06,649 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:59:06,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:59:06,651 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:59:06,653 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:59:06,655 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:59:06,656 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:59:06,657 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:59:06,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:59:06,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:59:06,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:59:06,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:59:06,661 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:59:06,662 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:59:06,663 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:59:06,665 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:59:06,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:59:06,668 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:59:06,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:59:06,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:59:06,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:59:06,673 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:59:06,674 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:59:06,674 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:59:06,675 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:59:06,675 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:59:06,676 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:59:06,676 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:59:06,677 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:59:06,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:59:06,678 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:59:06,679 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:59:06,680 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:59:06,680 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:59:06,681 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:59:06,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:59:06,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:59:06,682 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:59:06,683 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 [2020-10-12 09:59:06,704 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:59:06,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:59:06,705 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:59:06,706 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:59:06,706 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:59:06,706 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:59:06,706 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:59:06,706 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:59:06,707 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:59:06,707 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:59:06,707 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:59:06,707 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:59:06,707 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:59:06,708 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:59:06,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:59:06,708 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:59:06,708 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:59:06,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:59:06,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:59:06,709 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:59:06,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:59:06,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:59:06,709 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:59:06,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:59:06,710 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:59:06,710 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:59:06,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:59:06,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:59:06,711 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:59:06,711 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 09:59:07,001 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:59:07,019 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:59:07,025 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:59:07,027 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:59:07,029 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:59:07,030 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init9_ground-2.i [2020-10-12 09:59:07,095 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c438f9cc4/6474b281493d4d24bc88f7419cb86782/FLAGc3e77e16b [2020-10-12 09:59:07,553 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:59:07,554 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init9_ground-2.i [2020-10-12 09:59:07,569 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c438f9cc4/6474b281493d4d24bc88f7419cb86782/FLAGc3e77e16b [2020-10-12 09:59:07,904 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c438f9cc4/6474b281493d4d24bc88f7419cb86782 [2020-10-12 09:59:07,913 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:59:07,915 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:59:07,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:59:07,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:59:07,921 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:59:07,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:59:07" (1/1) ... [2020-10-12 09:59:07,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c6b7cfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:07, skipping insertion in model container [2020-10-12 09:59:07,929 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:59:07" (1/1) ... [2020-10-12 09:59:07,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:59:07,961 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:59:08,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:59:08,244 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:59:08,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:59:08,317 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:59:08,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:08 WrapperNode [2020-10-12 09:59:08,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:59:08,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:59:08,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:59:08,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:59:08,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:08" (1/1) ... [2020-10-12 09:59:08,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:08" (1/1) ... [2020-10-12 09:59:08,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:08" (1/1) ... [2020-10-12 09:59:08,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:08" (1/1) ... [2020-10-12 09:59:08,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:08" (1/1) ... [2020-10-12 09:59:08,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:08" (1/1) ... [2020-10-12 09:59:08,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:08" (1/1) ... [2020-10-12 09:59:08,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:59:08,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:59:08,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:59:08,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:59:08,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:08" (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 [2020-10-12 09:59:08,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:59:08,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:59:08,530 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:59:08,530 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:59:08,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:59:08,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:59:08,531 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:59:08,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:59:08,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:59:08,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:59:08,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:59:08,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:59:08,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:59:08,866 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:59:08,866 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-12 09:59:08,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:59:08 BoogieIcfgContainer [2020-10-12 09:59:08,872 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:59:08,879 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:59:08,880 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:59:08,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:59:08,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:59:07" (1/3) ... [2020-10-12 09:59:08,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@451370fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:59:08, skipping insertion in model container [2020-10-12 09:59:08,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:08" (2/3) ... [2020-10-12 09:59:08,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@451370fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:59:08, skipping insertion in model container [2020-10-12 09:59:08,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:59:08" (3/3) ... [2020-10-12 09:59:08,886 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init9_ground-2.i [2020-10-12 09:59:08,897 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:59:08,904 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:59:08,916 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:59:08,941 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:59:08,942 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:59:08,942 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:59:08,942 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:59:08,942 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:59:08,942 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:59:08,943 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:59:08,943 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:59:08,963 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-12 09:59:08,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 09:59:08,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:08,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:08,973 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:08,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:08,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1872712154, now seen corresponding path program 1 times [2020-10-12 09:59:08,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:08,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364690229] [2020-10-12 09:59:08,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:09,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:09,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:09,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:09,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:09,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:09,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:09,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:09,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:09,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:12,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:12,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 09:59:12,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 09:59:12,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3387 [2020-10-12 09:59:12,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:12,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:59:12,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:59:12,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:59:12,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 09:59:12,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:12,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:12,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:12,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:12,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:12,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:59:12,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:12,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:12,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:12,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:12,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:59:12,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364690229] [2020-10-12 09:59:12,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:59:12,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:59:12,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409182158] [2020-10-12 09:59:12,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:59:12,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:12,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:59:12,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:59:12,635 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 4 states. [2020-10-12 09:59:12,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:12,813 INFO L93 Difference]: Finished difference Result 80 states and 137 transitions. [2020-10-12 09:59:12,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:59:12,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-12 09:59:12,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:12,824 INFO L225 Difference]: With dead ends: 80 [2020-10-12 09:59:12,825 INFO L226 Difference]: Without dead ends: 43 [2020-10-12 09:59:12,828 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 [2020-10-12 09:59:12,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-12 09:59:12,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-12 09:59:12,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 09:59:12,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2020-10-12 09:59:12,874 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 29 [2020-10-12 09:59:12,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:12,875 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2020-10-12 09:59:12,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:59:12,875 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2020-10-12 09:59:12,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 09:59:12,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:12,877 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:12,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:59:12,878 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:12,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:12,878 INFO L82 PathProgramCache]: Analyzing trace with hash 97911482, now seen corresponding path program 1 times [2020-10-12 09:59:12,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:12,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101908600] [2020-10-12 09:59:12,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:12,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:12,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:12,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:12,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:12,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:12,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:12,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:13,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:13,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:17,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:17,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 09:59:17,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:59:17,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 09:59:17,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:17,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:59:17,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-12 09:59:17,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 09:59:17,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:17,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:17,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:17,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:17,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:17,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:17,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 09:59:17,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:17,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:17,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:17,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:17,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-12 09:59:17,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-12 09:59:17,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101908600] [2020-10-12 09:59:17,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:17,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 09:59:17,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480490222] [2020-10-12 09:59:17,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 09:59:17,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:17,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 09:59:17,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:59:17,973 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 5 states. [2020-10-12 09:59:18,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:18,220 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2020-10-12 09:59:18,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 09:59:18,222 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-10-12 09:59:18,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:18,223 INFO L225 Difference]: With dead ends: 87 [2020-10-12 09:59:18,223 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 09:59:18,225 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 [2020-10-12 09:59:18,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 09:59:18,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-12 09:59:18,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-12 09:59:18,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2020-10-12 09:59:18,244 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 38 [2020-10-12 09:59:18,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:18,245 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2020-10-12 09:59:18,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 09:59:18,245 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2020-10-12 09:59:18,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 09:59:18,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:18,250 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:18,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:59:18,251 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:18,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:18,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1965553710, now seen corresponding path program 2 times [2020-10-12 09:59:18,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:18,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101757861] [2020-10-12 09:59:18,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:18,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:18,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:18,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:18,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:18,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:18,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:18,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:18,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:23,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:23,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 09:59:23,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:59:23,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:59:23,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:23,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:59:23,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:59:23,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 09:59:23,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:23,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:23,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:23,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:23,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:23,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:23,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:23,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:59:23,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:23,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:23,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:23,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:23,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:59:23,394 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 09:59:23,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101757861] [2020-10-12 09:59:23,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:23,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:59:23,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912911090] [2020-10-12 09:59:23,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:59:23,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:23,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:59:23,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:59:23,399 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 6 states. [2020-10-12 09:59:23,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:23,703 INFO L93 Difference]: Finished difference Result 104 states and 130 transitions. [2020-10-12 09:59:23,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 09:59:23,704 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-12 09:59:23,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:23,707 INFO L225 Difference]: With dead ends: 104 [2020-10-12 09:59:23,708 INFO L226 Difference]: Without dead ends: 61 [2020-10-12 09:59:23,709 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 [2020-10-12 09:59:23,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-12 09:59:23,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-12 09:59:23,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 09:59:23,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-10-12 09:59:23,734 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 47 [2020-10-12 09:59:23,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:23,735 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-10-12 09:59:23,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:59:23,736 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-10-12 09:59:23,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 09:59:23,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:23,740 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:23,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:59:23,741 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:23,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:23,742 INFO L82 PathProgramCache]: Analyzing trace with hash 369658042, now seen corresponding path program 3 times [2020-10-12 09:59:23,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:23,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842080655] [2020-10-12 09:59:23,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:23,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:23,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:23,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:23,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:23,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:23,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:23,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:24,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:28,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:28,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 09:59:28,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:59:28,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:59:28,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:28,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:59:28,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-12 09:59:28,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 09:59:28,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:28,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:28,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:28,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:28,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:28,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:28,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:28,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:28,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:28,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:28,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:28,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:28,829 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-12 09:59:28,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842080655] [2020-10-12 09:59:28,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:28,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 09:59:28,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104899362] [2020-10-12 09:59:28,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 09:59:28,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:28,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 09:59:28,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:59:28,831 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 7 states. [2020-10-12 09:59:29,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:29,015 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2020-10-12 09:59:29,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:59:29,016 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-12 09:59:29,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:29,017 INFO L225 Difference]: With dead ends: 121 [2020-10-12 09:59:29,017 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 09:59:29,018 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 [2020-10-12 09:59:29,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 09:59:29,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-12 09:59:29,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 09:59:29,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2020-10-12 09:59:29,028 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 56 [2020-10-12 09:59:29,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:29,028 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2020-10-12 09:59:29,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 09:59:29,029 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2020-10-12 09:59:29,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 09:59:29,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:29,030 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:29,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:59:29,030 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:29,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:29,031 INFO L82 PathProgramCache]: Analyzing trace with hash 24657106, now seen corresponding path program 4 times [2020-10-12 09:59:29,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:29,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291227395] [2020-10-12 09:59:29,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:29,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:29,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:29,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:29,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:29,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:29,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:31,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:34,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:34,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 09:59:34,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:59:34,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:59:34,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:34,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:59:34,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-12 09:59:34,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:59:34,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:34,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:34,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:34,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:34,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:34,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:34,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:34,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:34,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:34,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:34,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:34,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-10-12 09:59:34,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291227395] [2020-10-12 09:59:34,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:34,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:59:34,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975611595] [2020-10-12 09:59:34,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:59:34,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:34,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:59:34,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:59:34,110 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand 8 states. [2020-10-12 09:59:34,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:34,310 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2020-10-12 09:59:34,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:59:34,310 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-12 09:59:34,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:34,311 INFO L225 Difference]: With dead ends: 138 [2020-10-12 09:59:34,311 INFO L226 Difference]: Without dead ends: 79 [2020-10-12 09:59:34,312 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 [2020-10-12 09:59:34,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-12 09:59:34,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-12 09:59:34,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-12 09:59:34,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2020-10-12 09:59:34,321 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 65 [2020-10-12 09:59:34,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:34,321 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2020-10-12 09:59:34,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:59:34,322 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2020-10-12 09:59:34,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 09:59:34,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:34,323 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:34,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:59:34,323 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:34,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:34,324 INFO L82 PathProgramCache]: Analyzing trace with hash -217477446, now seen corresponding path program 5 times [2020-10-12 09:59:34,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:34,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042625960] [2020-10-12 09:59:34,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:34,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:34,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:34,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:34,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:34,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:34,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:36,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:39,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:39,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 09:59:39,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:59:39,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:59:39,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:39,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:59:39,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-12 09:59:39,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:59:39,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:39,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:39,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:39,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:39,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:39,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:39,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:39,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:39,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:39,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:39,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:39,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-12 09:59:39,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042625960] [2020-10-12 09:59:39,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:39,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:59:39,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113290194] [2020-10-12 09:59:39,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:59:39,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:39,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:59:39,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:59:39,433 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 9 states. [2020-10-12 09:59:39,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:39,695 INFO L93 Difference]: Finished difference Result 155 states and 181 transitions. [2020-10-12 09:59:39,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 09:59:39,695 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 74 [2020-10-12 09:59:39,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:39,696 INFO L225 Difference]: With dead ends: 155 [2020-10-12 09:59:39,696 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 09:59:39,698 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 [2020-10-12 09:59:39,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 09:59:39,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-12 09:59:39,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-12 09:59:39,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2020-10-12 09:59:39,707 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 74 [2020-10-12 09:59:39,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:39,707 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2020-10-12 09:59:39,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:59:39,707 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2020-10-12 09:59:39,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-12 09:59:39,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:39,708 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:39,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:59:39,709 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:39,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:39,709 INFO L82 PathProgramCache]: Analyzing trace with hash 346386898, now seen corresponding path program 6 times [2020-10-12 09:59:39,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:39,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542864615] [2020-10-12 09:59:39,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:39,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:39,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:39,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:39,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:39,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:39,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:43,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:44,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:44,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 09:59:44,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:59:44,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:59:44,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:44,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:59:44,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-12 09:59:44,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 09:59:44,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:44,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:44,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:44,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:44,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:44,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:44,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:44,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:59:44,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:44,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:44,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:44,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:44,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:44,811 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2020-10-12 09:59:44,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542864615] [2020-10-12 09:59:44,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:44,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:59:44,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860106333] [2020-10-12 09:59:44,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:59:44,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:44,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:59:44,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:59:44,814 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand 10 states. [2020-10-12 09:59:45,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:45,091 INFO L93 Difference]: Finished difference Result 172 states and 198 transitions. [2020-10-12 09:59:45,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 09:59:45,092 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 83 [2020-10-12 09:59:45,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:45,093 INFO L225 Difference]: With dead ends: 172 [2020-10-12 09:59:45,093 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 09:59:45,094 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 [2020-10-12 09:59:45,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 09:59:45,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-12 09:59:45,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-12 09:59:45,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2020-10-12 09:59:45,112 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 83 [2020-10-12 09:59:45,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:45,112 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2020-10-12 09:59:45,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:59:45,113 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2020-10-12 09:59:45,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-12 09:59:45,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:45,117 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:45,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:59:45,122 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:45,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:45,123 INFO L82 PathProgramCache]: Analyzing trace with hash -698280774, now seen corresponding path program 7 times [2020-10-12 09:59:45,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:45,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108459914] [2020-10-12 09:59:45,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:45,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:45,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:45,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:45,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:45,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:45,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:50,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:50,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-12 09:59:50,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:50,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 09:59:50,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:50,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:59:50,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:59:50,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 09:59:50,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:50,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:50,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:50,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:50,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:50,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:50,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:50,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:50,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:50,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:50,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:50,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-10-12 09:59:50,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108459914] [2020-10-12 09:59:50,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:50,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:59:50,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397713597] [2020-10-12 09:59:50,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:59:50,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:50,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:59:50,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:59:50,245 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand 11 states. [2020-10-12 09:59:50,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:50,572 INFO L93 Difference]: Finished difference Result 189 states and 215 transitions. [2020-10-12 09:59:50,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:59:50,573 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 92 [2020-10-12 09:59:50,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:50,574 INFO L225 Difference]: With dead ends: 189 [2020-10-12 09:59:50,574 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 09:59:50,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:59:50,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 09:59:50,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-12 09:59:50,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-12 09:59:50,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 115 transitions. [2020-10-12 09:59:50,603 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 115 transitions. Word has length 92 [2020-10-12 09:59:50,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:50,603 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 115 transitions. [2020-10-12 09:59:50,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:59:50,603 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 115 transitions. [2020-10-12 09:59:50,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-12 09:59:50,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:50,611 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:50,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:59:50,611 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:50,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:50,612 INFO L82 PathProgramCache]: Analyzing trace with hash -732453166, now seen corresponding path program 8 times [2020-10-12 09:59:50,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:50,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019488240] [2020-10-12 09:59:50,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:50,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:50,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:50,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:50,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:50,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:51,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:55,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:55,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-12 09:59:55,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:55,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 09:59:55,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:55,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:59:55,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-12 09:59:55,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 09:59:55,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:55,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:55,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:55,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:55,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:55,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:55,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:55,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:59:55,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:55,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:55,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:55,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:55,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:55,762 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-12 09:59:55,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019488240] [2020-10-12 09:59:55,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:55,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:59:55,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656898829] [2020-10-12 09:59:55,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:59:55,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:55,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:59:55,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:59:55,772 INFO L87 Difference]: Start difference. First operand 106 states and 115 transitions. Second operand 12 states. [2020-10-12 09:59:56,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:56,083 INFO L93 Difference]: Finished difference Result 206 states and 232 transitions. [2020-10-12 09:59:56,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:59:56,084 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 101 [2020-10-12 09:59:56,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:56,085 INFO L225 Difference]: With dead ends: 206 [2020-10-12 09:59:56,085 INFO L226 Difference]: Without dead ends: 115 [2020-10-12 09:59:56,086 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 [2020-10-12 09:59:56,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-12 09:59:56,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-12 09:59:56,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-12 09:59:56,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2020-10-12 09:59:56,110 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 101 [2020-10-12 09:59:56,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:56,112 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2020-10-12 09:59:56,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:59:56,112 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2020-10-12 09:59:56,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-12 09:59:56,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:56,114 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:56,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:59:56,115 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:56,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:56,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1838619322, now seen corresponding path program 9 times [2020-10-12 09:59:56,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:56,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183117517] [2020-10-12 09:59:56,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:56,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:56,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:56,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:56,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:56,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:56,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:56,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:01,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:01,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-12 10:00:01,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:01,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 10:00:01,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:01,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 10:00:01,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-12 10:00:01,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 10:00:01,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:01,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:01,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:01,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:01,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:01,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:01,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:01,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:01,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:01,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:01,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:01,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:01,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2020-10-12 10:00:01,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183117517] [2020-10-12 10:00:01,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:01,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 10:00:01,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928383461] [2020-10-12 10:00:01,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 10:00:01,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:01,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 10:00:01,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:00:01,272 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand 13 states. [2020-10-12 10:00:01,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:01,573 INFO L93 Difference]: Finished difference Result 223 states and 249 transitions. [2020-10-12 10:00:01,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 10:00:01,574 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 110 [2020-10-12 10:00:01,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:01,574 INFO L225 Difference]: With dead ends: 223 [2020-10-12 10:00:01,575 INFO L226 Difference]: Without dead ends: 124 [2020-10-12 10:00:01,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:00:01,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-12 10:00:01,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-12 10:00:01,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-12 10:00:01,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2020-10-12 10:00:01,584 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 110 [2020-10-12 10:00:01,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:01,584 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2020-10-12 10:00:01,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 10:00:01,584 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2020-10-12 10:00:01,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-12 10:00:01,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:01,586 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:01,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 10:00:01,586 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:01,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:01,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1132012590, now seen corresponding path program 10 times [2020-10-12 10:00:01,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:01,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668293799] [2020-10-12 10:00:01,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:01,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:01,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:01,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:01,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:01,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:01,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:01,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:06,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:06,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-12 10:00:06,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:06,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 10:00:06,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:06,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:00:06,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-12 10:00:06,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 10:00:06,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:06,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:06,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:06,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:06,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:06,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:06,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:06,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:06,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:06,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:06,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:06,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:06,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-10-12 10:00:06,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668293799] [2020-10-12 10:00:06,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:06,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:00:06,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748018943] [2020-10-12 10:00:06,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:00:06,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:06,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:00:06,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:00:06,756 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand 14 states. [2020-10-12 10:00:07,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:07,086 INFO L93 Difference]: Finished difference Result 240 states and 266 transitions. [2020-10-12 10:00:07,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:00:07,086 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 119 [2020-10-12 10:00:07,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:07,088 INFO L225 Difference]: With dead ends: 240 [2020-10-12 10:00:07,088 INFO L226 Difference]: Without dead ends: 133 [2020-10-12 10:00:07,089 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 [2020-10-12 10:00:07,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-12 10:00:07,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-10-12 10:00:07,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-12 10:00:07,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 142 transitions. [2020-10-12 10:00:07,096 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 142 transitions. Word has length 119 [2020-10-12 10:00:07,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:07,096 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 142 transitions. [2020-10-12 10:00:07,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:00:07,096 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 142 transitions. [2020-10-12 10:00:07,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-12 10:00:07,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:07,098 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:07,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:00:07,098 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:07,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:07,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1513332922, now seen corresponding path program 11 times [2020-10-12 10:00:07,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:07,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752191817] [2020-10-12 10:00:07,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:07,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:07,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:07,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:07,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:07,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:07,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:12,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:12,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-12 10:00:12,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:12,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 10:00:12,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:12,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:00:12,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-12 10:00:12,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 10:00:12,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:12,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:12,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:12,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:12,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:12,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:12,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:12,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:12,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:12,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:12,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:12,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:12,288 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2020-10-12 10:00:12,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752191817] [2020-10-12 10:00:12,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:12,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:00:12,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418660371] [2020-10-12 10:00:12,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:00:12,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:12,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:00:12,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:00:12,291 INFO L87 Difference]: Start difference. First operand 133 states and 142 transitions. Second operand 15 states. [2020-10-12 10:00:12,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:12,669 INFO L93 Difference]: Finished difference Result 257 states and 283 transitions. [2020-10-12 10:00:12,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 10:00:12,670 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 128 [2020-10-12 10:00:12,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:12,672 INFO L225 Difference]: With dead ends: 257 [2020-10-12 10:00:12,672 INFO L226 Difference]: Without dead ends: 142 [2020-10-12 10:00:12,673 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 [2020-10-12 10:00:12,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-12 10:00:12,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-12 10:00:12,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-12 10:00:12,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 151 transitions. [2020-10-12 10:00:12,681 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 151 transitions. Word has length 128 [2020-10-12 10:00:12,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:12,681 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 151 transitions. [2020-10-12 10:00:12,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 10:00:12,681 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 151 transitions. [2020-10-12 10:00:12,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-12 10:00:12,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:12,683 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:12,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:00:12,683 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:12,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:12,684 INFO L82 PathProgramCache]: Analyzing trace with hash 892014802, now seen corresponding path program 12 times [2020-10-12 10:00:12,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:12,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811689047] [2020-10-12 10:00:12,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:12,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:12,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:12,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:12,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:12,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:13,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:17,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:17,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-12 10:00:17,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:17,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 10:00:17,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:17,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:00:17,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-12 10:00:17,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 10:00:17,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:17,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:17,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:17,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:17,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:17,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:17,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:17,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:17,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:17,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:17,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:17,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:17,874 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2020-10-12 10:00:17,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811689047] [2020-10-12 10:00:17,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:17,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 10:00:17,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849070188] [2020-10-12 10:00:17,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:00:17,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:17,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:00:17,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:00:17,876 INFO L87 Difference]: Start difference. First operand 142 states and 151 transitions. Second operand 16 states. [2020-10-12 10:00:18,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:18,279 INFO L93 Difference]: Finished difference Result 274 states and 300 transitions. [2020-10-12 10:00:18,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:00:18,279 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 137 [2020-10-12 10:00:18,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:18,280 INFO L225 Difference]: With dead ends: 274 [2020-10-12 10:00:18,280 INFO L226 Difference]: Without dead ends: 151 [2020-10-12 10:00:18,281 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 [2020-10-12 10:00:18,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-12 10:00:18,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2020-10-12 10:00:18,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-12 10:00:18,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 160 transitions. [2020-10-12 10:00:18,289 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 160 transitions. Word has length 137 [2020-10-12 10:00:18,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:18,289 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 160 transitions. [2020-10-12 10:00:18,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:00:18,289 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 160 transitions. [2020-10-12 10:00:18,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-12 10:00:18,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:18,291 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:18,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:00:18,292 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:18,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:18,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1312905542, now seen corresponding path program 13 times [2020-10-12 10:00:18,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:18,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562106814] [2020-10-12 10:00:18,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:18,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:18,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:18,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:18,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:18,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:18,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:23,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:23,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-12 10:00:23,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:23,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 10:00:23,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:23,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:00:23,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-12 10:00:23,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 10:00:23,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:23,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:23,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:23,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:23,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:23,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:23,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:23,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:23,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:23,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:23,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:23,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 728 trivial. 0 not checked. [2020-10-12 10:00:23,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562106814] [2020-10-12 10:00:23,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:23,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:00:23,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759012107] [2020-10-12 10:00:23,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:00:23,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:23,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:00:23,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:00:23,514 INFO L87 Difference]: Start difference. First operand 151 states and 160 transitions. Second operand 17 states. [2020-10-12 10:00:23,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:23,935 INFO L93 Difference]: Finished difference Result 291 states and 317 transitions. [2020-10-12 10:00:23,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 10:00:23,935 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 146 [2020-10-12 10:00:23,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:23,937 INFO L225 Difference]: With dead ends: 291 [2020-10-12 10:00:23,938 INFO L226 Difference]: Without dead ends: 160 [2020-10-12 10:00:23,939 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 [2020-10-12 10:00:23,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-12 10:00:23,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-12 10:00:23,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-12 10:00:23,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 169 transitions. [2020-10-12 10:00:23,947 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 169 transitions. Word has length 146 [2020-10-12 10:00:23,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:23,947 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 169 transitions. [2020-10-12 10:00:23,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:00:23,947 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 169 transitions. [2020-10-12 10:00:23,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-12 10:00:23,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:23,948 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:23,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:00:23,949 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:23,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:23,949 INFO L82 PathProgramCache]: Analyzing trace with hash 305939922, now seen corresponding path program 14 times [2020-10-12 10:00:23,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:23,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737020516] [2020-10-12 10:00:23,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:23,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:24,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:24,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:24,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:24,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:24,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:28,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:28,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-12 10:00:28,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:28,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 10:00:28,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:28,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 10:00:28,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-12 10:00:28,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 10:00:28,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:29,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:29,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:29,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:29,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:29,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:29,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:29,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:29,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:29,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:29,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:29,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-10-12 10:00:29,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737020516] [2020-10-12 10:00:29,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:29,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:00:29,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847876125] [2020-10-12 10:00:29,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:00:29,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:29,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:00:29,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:00:29,196 INFO L87 Difference]: Start difference. First operand 160 states and 169 transitions. Second operand 18 states. [2020-10-12 10:00:29,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:29,589 INFO L93 Difference]: Finished difference Result 308 states and 334 transitions. [2020-10-12 10:00:29,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 10:00:29,589 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 155 [2020-10-12 10:00:29,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:29,591 INFO L225 Difference]: With dead ends: 308 [2020-10-12 10:00:29,591 INFO L226 Difference]: Without dead ends: 169 [2020-10-12 10:00:29,593 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 [2020-10-12 10:00:29,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-12 10:00:29,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2020-10-12 10:00:29,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-12 10:00:29,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 178 transitions. [2020-10-12 10:00:29,602 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 178 transitions. Word has length 155 [2020-10-12 10:00:29,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:29,602 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 178 transitions. [2020-10-12 10:00:29,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:00:29,602 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 178 transitions. [2020-10-12 10:00:29,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-12 10:00:29,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:29,604 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:29,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:00:29,604 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:29,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:29,605 INFO L82 PathProgramCache]: Analyzing trace with hash 2109746362, now seen corresponding path program 15 times [2020-10-12 10:00:29,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:29,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432773515] [2020-10-12 10:00:29,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:29,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:29,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:29,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:29,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:29,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:30,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:34,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:34,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-12 10:00:34,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:34,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 10:00:34,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:34,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:00:34,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-12 10:00:34,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 10:00:34,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:34,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:34,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:34,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:34,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:34,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:34,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:34,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:34,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:34,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:34,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:34,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:34,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2020-10-12 10:00:34,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432773515] [2020-10-12 10:00:34,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:34,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:00:34,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315418474] [2020-10-12 10:00:34,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:00:34,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:34,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:00:34,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:00:34,864 INFO L87 Difference]: Start difference. First operand 169 states and 178 transitions. Second operand 19 states. [2020-10-12 10:00:35,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:35,264 INFO L93 Difference]: Finished difference Result 325 states and 351 transitions. [2020-10-12 10:00:35,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 10:00:35,264 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 164 [2020-10-12 10:00:35,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:35,266 INFO L225 Difference]: With dead ends: 325 [2020-10-12 10:00:35,266 INFO L226 Difference]: Without dead ends: 178 [2020-10-12 10:00:35,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:00:35,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-12 10:00:35,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-10-12 10:00:35,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-12 10:00:35,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 187 transitions. [2020-10-12 10:00:35,277 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 187 transitions. Word has length 164 [2020-10-12 10:00:35,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:35,278 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 187 transitions. [2020-10-12 10:00:35,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:00:35,278 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 187 transitions. [2020-10-12 10:00:35,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-12 10:00:35,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:35,280 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:35,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:00:35,280 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:35,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:35,281 INFO L82 PathProgramCache]: Analyzing trace with hash 330463954, now seen corresponding path program 16 times [2020-10-12 10:00:35,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:35,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145617487] [2020-10-12 10:00:35,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:35,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:35,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:35,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:35,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:35,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:35,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:35,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:40,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:40,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-12 10:00:40,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:40,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-12 10:00:40,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:40,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:00:40,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-12 10:00:40,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 10:00:40,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:40,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:40,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:40,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:40,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:40,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:40,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:00:40,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:40,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:40,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:40,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:40,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 1088 trivial. 0 not checked. [2020-10-12 10:00:40,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145617487] [2020-10-12 10:00:40,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:40,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:00:40,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388585879] [2020-10-12 10:00:40,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:00:40,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:40,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:00:40,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:00:40,574 INFO L87 Difference]: Start difference. First operand 178 states and 187 transitions. Second operand 20 states. [2020-10-12 10:00:41,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:41,060 INFO L93 Difference]: Finished difference Result 342 states and 368 transitions. [2020-10-12 10:00:41,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 10:00:41,060 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 173 [2020-10-12 10:00:41,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:41,062 INFO L225 Difference]: With dead ends: 342 [2020-10-12 10:00:41,062 INFO L226 Difference]: Without dead ends: 187 [2020-10-12 10:00:41,063 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 [2020-10-12 10:00:41,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-12 10:00:41,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2020-10-12 10:00:41,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-12 10:00:41,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 196 transitions. [2020-10-12 10:00:41,071 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 196 transitions. Word has length 173 [2020-10-12 10:00:41,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:41,072 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 196 transitions. [2020-10-12 10:00:41,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:00:41,072 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 196 transitions. [2020-10-12 10:00:41,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-12 10:00:41,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:41,073 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:41,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 10:00:41,074 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:41,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:41,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1002451642, now seen corresponding path program 17 times [2020-10-12 10:00:41,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:41,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284806330] [2020-10-12 10:00:41,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:41,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:41,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:41,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:41,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:41,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:41,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:46,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:46,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-12 10:00:46,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:46,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 10:00:46,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:46,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:00:46,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-12 10:00:46,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 10:00:46,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:46,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:46,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:46,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:46,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:46,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:46,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:46,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:46,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:46,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:46,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:46,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:00:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1224 trivial. 0 not checked. [2020-10-12 10:00:46,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284806330] [2020-10-12 10:00:46,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:46,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:00:46,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277466330] [2020-10-12 10:00:46,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:00:46,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:46,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:00:46,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:00:46,395 INFO L87 Difference]: Start difference. First operand 187 states and 196 transitions. Second operand 21 states. [2020-10-12 10:00:46,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:46,911 INFO L93 Difference]: Finished difference Result 359 states and 385 transitions. [2020-10-12 10:00:46,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 10:00:46,911 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 182 [2020-10-12 10:00:46,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:46,913 INFO L225 Difference]: With dead ends: 359 [2020-10-12 10:00:46,913 INFO L226 Difference]: Without dead ends: 196 [2020-10-12 10:00:46,914 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 [2020-10-12 10:00:46,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-12 10:00:46,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2020-10-12 10:00:46,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-12 10:00:46,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 205 transitions. [2020-10-12 10:00:46,922 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 205 transitions. Word has length 182 [2020-10-12 10:00:46,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:46,923 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 205 transitions. [2020-10-12 10:00:46,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:00:46,923 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 205 transitions. [2020-10-12 10:00:46,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-12 10:00:46,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:46,924 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:46,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 10:00:46,925 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:46,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:46,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1703260114, now seen corresponding path program 18 times [2020-10-12 10:00:46,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:46,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536510596] [2020-10-12 10:00:46,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:46,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:46,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:47,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:47,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:47,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:47,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:47,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:51,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:51,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-12 10:00:51,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:51,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 10:00:51,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:51,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:00:51,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-12 10:00:51,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 10:00:51,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:52,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:52,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:52,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:52,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:52,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:52,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:52,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:52,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:52,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:52,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:52,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1539 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2020-10-12 10:00:52,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536510596] [2020-10-12 10:00:52,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:52,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 10:00:52,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105611230] [2020-10-12 10:00:52,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 10:00:52,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:52,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 10:00:52,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:00:52,257 INFO L87 Difference]: Start difference. First operand 196 states and 205 transitions. Second operand 22 states. [2020-10-12 10:00:52,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:52,793 INFO L93 Difference]: Finished difference Result 376 states and 402 transitions. [2020-10-12 10:00:52,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 10:00:52,794 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 191 [2020-10-12 10:00:52,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:52,795 INFO L225 Difference]: With dead ends: 376 [2020-10-12 10:00:52,795 INFO L226 Difference]: Without dead ends: 205 [2020-10-12 10:00:52,797 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 [2020-10-12 10:00:52,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-12 10:00:52,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2020-10-12 10:00:52,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-12 10:00:52,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 214 transitions. [2020-10-12 10:00:52,806 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 214 transitions. Word has length 191 [2020-10-12 10:00:52,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:52,807 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 214 transitions. [2020-10-12 10:00:52,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 10:00:52,807 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 214 transitions. [2020-10-12 10:00:52,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-12 10:00:52,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:52,809 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:52,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 10:00:52,809 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:52,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:52,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1564915898, now seen corresponding path program 19 times [2020-10-12 10:00:52,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:52,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798558568] [2020-10-12 10:00:52,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:52,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:52,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:52,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:53,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:53,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:53,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:57,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:57,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-12 10:00:57,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:57,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:00:57,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:57,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:00:57,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-12 10:00:57,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 10:00:57,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:58,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:58,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:58,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:58,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:58,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:58,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:58,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:58,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:58,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:58,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:58,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:58,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:58,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1710 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-10-12 10:00:58,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798558568] [2020-10-12 10:00:58,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:58,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:00:58,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964601208] [2020-10-12 10:00:58,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:00:58,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:58,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:00:58,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:00:58,151 INFO L87 Difference]: Start difference. First operand 205 states and 214 transitions. Second operand 23 states. [2020-10-12 10:00:58,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:58,661 INFO L93 Difference]: Finished difference Result 393 states and 419 transitions. [2020-10-12 10:00:58,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 10:00:58,662 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 200 [2020-10-12 10:00:58,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:58,664 INFO L225 Difference]: With dead ends: 393 [2020-10-12 10:00:58,664 INFO L226 Difference]: Without dead ends: 214 [2020-10-12 10:00:58,665 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 [2020-10-12 10:00:58,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-12 10:00:58,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-10-12 10:00:58,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-12 10:00:58,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 223 transitions. [2020-10-12 10:00:58,684 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 223 transitions. Word has length 200 [2020-10-12 10:00:58,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:58,685 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 223 transitions. [2020-10-12 10:00:58,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:00:58,686 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 223 transitions. [2020-10-12 10:00:58,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-12 10:00:58,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:58,689 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:58,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 10:00:58,689 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:58,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:58,689 INFO L82 PathProgramCache]: Analyzing trace with hash 531490002, now seen corresponding path program 20 times [2020-10-12 10:00:58,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:58,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498677838] [2020-10-12 10:00:58,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:58,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:58,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:58,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:59,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:59,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:59,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:59,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:03,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:03,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-12 10:01:03,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:01:03,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 10:01:03,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:03,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 10:01:03,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:01:03,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:01:03,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:04,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:04,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:04,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:04,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:04,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:04,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:04,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:04,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:04,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:04,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:04,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1680 trivial. 0 not checked. [2020-10-12 10:01:04,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498677838] [2020-10-12 10:01:04,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:04,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 10:01:04,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632080339] [2020-10-12 10:01:04,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 10:01:04,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:04,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 10:01:04,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:01:04,078 INFO L87 Difference]: Start difference. First operand 214 states and 223 transitions. Second operand 24 states. [2020-10-12 10:01:04,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:04,643 INFO L93 Difference]: Finished difference Result 410 states and 436 transitions. [2020-10-12 10:01:04,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 10:01:04,644 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 209 [2020-10-12 10:01:04,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:04,646 INFO L225 Difference]: With dead ends: 410 [2020-10-12 10:01:04,646 INFO L226 Difference]: Without dead ends: 223 [2020-10-12 10:01:04,648 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 [2020-10-12 10:01:04,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-12 10:01:04,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2020-10-12 10:01:04,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-12 10:01:04,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 232 transitions. [2020-10-12 10:01:04,658 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 232 transitions. Word has length 209 [2020-10-12 10:01:04,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:04,659 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 232 transitions. [2020-10-12 10:01:04,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 10:01:04,659 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 232 transitions. [2020-10-12 10:01:04,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-12 10:01:04,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:04,660 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:04,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 10:01:04,661 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:04,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:04,661 INFO L82 PathProgramCache]: Analyzing trace with hash -941900102, now seen corresponding path program 21 times [2020-10-12 10:01:04,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:04,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409724022] [2020-10-12 10:01:04,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:04,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:04,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:04,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:05,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:05,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:05,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:09,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:09,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-12 10:01:09,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:01:09,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-12 10:01:09,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:09,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 10:01:09,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-12 10:01:09,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 10:01:09,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:10,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:10,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:10,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:10,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:10,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:10,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:10,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:10,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:10,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:10,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:10,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2079 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1848 trivial. 0 not checked. [2020-10-12 10:01:10,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409724022] [2020-10-12 10:01:10,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:10,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 10:01:10,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690540904] [2020-10-12 10:01:10,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 10:01:10,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:10,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 10:01:10,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:01:10,121 INFO L87 Difference]: Start difference. First operand 223 states and 232 transitions. Second operand 25 states. [2020-10-12 10:01:10,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:10,790 INFO L93 Difference]: Finished difference Result 427 states and 453 transitions. [2020-10-12 10:01:10,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 10:01:10,790 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 218 [2020-10-12 10:01:10,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:10,792 INFO L225 Difference]: With dead ends: 427 [2020-10-12 10:01:10,792 INFO L226 Difference]: Without dead ends: 232 [2020-10-12 10:01:10,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:01:10,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-12 10:01:10,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2020-10-12 10:01:10,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-12 10:01:10,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 241 transitions. [2020-10-12 10:01:10,806 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 241 transitions. Word has length 218 [2020-10-12 10:01:10,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:10,806 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 241 transitions. [2020-10-12 10:01:10,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 10:01:10,806 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 241 transitions. [2020-10-12 10:01:10,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-12 10:01:10,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:10,808 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:10,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 10:01:10,808 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:10,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:10,809 INFO L82 PathProgramCache]: Analyzing trace with hash -970778158, now seen corresponding path program 22 times [2020-10-12 10:01:10,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:10,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97541474] [2020-10-12 10:01:10,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:10,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:11,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:11,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:11,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:11,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:13,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:15,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:15,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-12 10:01:15,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:01:15,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-12 10:01:15,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:15,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 10:01:15,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-12 10:01:15,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:01:15,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:16,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:16,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:16,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:16,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:16,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:16,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:16,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:16,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:16,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:16,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:16,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:01:16,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2277 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2020-10-12 10:01:16,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97541474] [2020-10-12 10:01:16,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:16,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 10:01:16,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420226093] [2020-10-12 10:01:16,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 10:01:16,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:16,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 10:01:16,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:01:16,463 INFO L87 Difference]: Start difference. First operand 232 states and 241 transitions. Second operand 26 states. [2020-10-12 10:01:17,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:17,144 INFO L93 Difference]: Finished difference Result 444 states and 470 transitions. [2020-10-12 10:01:17,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 10:01:17,144 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 227 [2020-10-12 10:01:17,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:17,146 INFO L225 Difference]: With dead ends: 444 [2020-10-12 10:01:17,147 INFO L226 Difference]: Without dead ends: 241 [2020-10-12 10:01:17,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:01:17,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-12 10:01:17,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2020-10-12 10:01:17,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-12 10:01:17,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 250 transitions. [2020-10-12 10:01:17,156 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 250 transitions. Word has length 227 [2020-10-12 10:01:17,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:17,157 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 250 transitions. [2020-10-12 10:01:17,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 10:01:17,157 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 250 transitions. [2020-10-12 10:01:17,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-10-12 10:01:17,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:17,159 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:17,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 10:01:17,159 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:17,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:17,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1426539706, now seen corresponding path program 23 times [2020-10-12 10:01:17,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:17,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064528600] [2020-10-12 10:01:17,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:17,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:17,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:17,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:17,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:17,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:17,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:18,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:22,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:22,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 244 [2020-10-12 10:01:22,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:01:22,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:01:22,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:22,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 10:01:22,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:01:22,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 10:01:22,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:22,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:22,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:22,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:22,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:22,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:22,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:22,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:22,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:22,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:22,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:22,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:22,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2484 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 2208 trivial. 0 not checked. [2020-10-12 10:01:22,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064528600] [2020-10-12 10:01:22,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:22,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 10:01:22,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578477857] [2020-10-12 10:01:22,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 10:01:22,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:22,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 10:01:22,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:01:22,748 INFO L87 Difference]: Start difference. First operand 241 states and 250 transitions. Second operand 27 states. [2020-10-12 10:01:23,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:23,357 INFO L93 Difference]: Finished difference Result 461 states and 487 transitions. [2020-10-12 10:01:23,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 10:01:23,358 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 236 [2020-10-12 10:01:23,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:23,359 INFO L225 Difference]: With dead ends: 461 [2020-10-12 10:01:23,359 INFO L226 Difference]: Without dead ends: 250 [2020-10-12 10:01:23,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:01:23,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-12 10:01:23,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2020-10-12 10:01:23,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-12 10:01:23,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 259 transitions. [2020-10-12 10:01:23,370 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 259 transitions. Word has length 236 [2020-10-12 10:01:23,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:23,370 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 259 transitions. [2020-10-12 10:01:23,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 10:01:23,371 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 259 transitions. [2020-10-12 10:01:23,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-12 10:01:23,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:23,373 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:23,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 10:01:23,373 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:23,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:23,373 INFO L82 PathProgramCache]: Analyzing trace with hash -925020462, now seen corresponding path program 24 times [2020-10-12 10:01:23,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:23,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848695085] [2020-10-12 10:01:23,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:23,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:23,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:23,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:23,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:23,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:23,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:24,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:28,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:28,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-12 10:01:28,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:01:28,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:01:28,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:28,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 10:01:28,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 115 [2020-10-12 10:01:28,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:01:28,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:29,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:29,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:29,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:29,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:29,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:29,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:29,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:29,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:29,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:29,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:29,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:01:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2700 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 2400 trivial. 0 not checked. [2020-10-12 10:01:29,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848695085] [2020-10-12 10:01:29,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:29,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 10:01:29,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412682739] [2020-10-12 10:01:29,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 10:01:29,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:29,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 10:01:29,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:01:29,082 INFO L87 Difference]: Start difference. First operand 250 states and 259 transitions. Second operand 28 states. [2020-10-12 10:01:29,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:29,769 INFO L93 Difference]: Finished difference Result 478 states and 504 transitions. [2020-10-12 10:01:29,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 10:01:29,770 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 245 [2020-10-12 10:01:29,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:29,771 INFO L225 Difference]: With dead ends: 478 [2020-10-12 10:01:29,771 INFO L226 Difference]: Without dead ends: 259 [2020-10-12 10:01:29,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:01:29,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-12 10:01:29,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2020-10-12 10:01:29,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-12 10:01:29,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 268 transitions. [2020-10-12 10:01:29,781 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 268 transitions. Word has length 245 [2020-10-12 10:01:29,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:29,781 INFO L479 AbstractCegarLoop]: Abstraction has 259 states and 268 transitions. [2020-10-12 10:01:29,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 10:01:29,782 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 268 transitions. [2020-10-12 10:01:29,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-10-12 10:01:29,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:29,783 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:29,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 10:01:29,784 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:29,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:29,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1381059258, now seen corresponding path program 25 times [2020-10-12 10:01:29,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:29,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546218993] [2020-10-12 10:01:29,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:29,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:29,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:30,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:30,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:30,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:31,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:34,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:34,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 262 [2020-10-12 10:01:34,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:01:34,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-12 10:01:34,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:34,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 10:01:34,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-12 10:01:34,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 10:01:34,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:35,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:35,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:35,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:35,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:35,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:35,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:01:35,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:35,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:35,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:35,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:35,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:35,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2925 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 2600 trivial. 0 not checked. [2020-10-12 10:01:35,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546218993] [2020-10-12 10:01:35,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:35,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 10:01:35,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344709862] [2020-10-12 10:01:35,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 10:01:35,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:35,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 10:01:35,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:01:35,355 INFO L87 Difference]: Start difference. First operand 259 states and 268 transitions. Second operand 29 states. [2020-10-12 10:01:36,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:36,050 INFO L93 Difference]: Finished difference Result 495 states and 521 transitions. [2020-10-12 10:01:36,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 10:01:36,050 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 254 [2020-10-12 10:01:36,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:36,052 INFO L225 Difference]: With dead ends: 495 [2020-10-12 10:01:36,053 INFO L226 Difference]: Without dead ends: 268 [2020-10-12 10:01:36,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:01:36,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-12 10:01:36,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2020-10-12 10:01:36,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-12 10:01:36,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 277 transitions. [2020-10-12 10:01:36,064 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 277 transitions. Word has length 254 [2020-10-12 10:01:36,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:36,064 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 277 transitions. [2020-10-12 10:01:36,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 10:01:36,064 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 277 transitions. [2020-10-12 10:01:36,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-12 10:01:36,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:36,066 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:36,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 10:01:36,066 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:36,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:36,067 INFO L82 PathProgramCache]: Analyzing trace with hash 64259026, now seen corresponding path program 26 times [2020-10-12 10:01:36,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:36,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919876698] [2020-10-12 10:01:36,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:36,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:36,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:36,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:36,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:36,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:38,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:41,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:41,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-12 10:01:41,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:01:41,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-12 10:01:41,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:41,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 10:01:41,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-12 10:01:41,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:01:41,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:41,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:41,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:41,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:41,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:41,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:41,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:01:41,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:41,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:41,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:41,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:41,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:41,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3159 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2808 trivial. 0 not checked. [2020-10-12 10:01:41,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919876698] [2020-10-12 10:01:41,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:41,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 10:01:41,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752517431] [2020-10-12 10:01:41,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 10:01:41,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:41,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 10:01:41,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:01:41,687 INFO L87 Difference]: Start difference. First operand 268 states and 277 transitions. Second operand 30 states. [2020-10-12 10:01:42,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:42,384 INFO L93 Difference]: Finished difference Result 512 states and 538 transitions. [2020-10-12 10:01:42,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 10:01:42,385 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 263 [2020-10-12 10:01:42,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:42,388 INFO L225 Difference]: With dead ends: 512 [2020-10-12 10:01:42,388 INFO L226 Difference]: Without dead ends: 277 [2020-10-12 10:01:42,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:01:42,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-10-12 10:01:42,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2020-10-12 10:01:42,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-12 10:01:42,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 286 transitions. [2020-10-12 10:01:42,398 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 286 transitions. Word has length 263 [2020-10-12 10:01:42,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:42,399 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 286 transitions. [2020-10-12 10:01:42,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 10:01:42,399 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 286 transitions. [2020-10-12 10:01:42,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-12 10:01:42,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:42,401 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:42,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 10:01:42,401 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:42,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:42,402 INFO L82 PathProgramCache]: Analyzing trace with hash 21090490, now seen corresponding path program 27 times [2020-10-12 10:01:42,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:42,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407520153] [2020-10-12 10:01:42,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:42,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:42,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:42,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:42,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:42,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:44,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:47,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:47,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-12 10:01:47,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:01:47,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-12 10:01:47,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:47,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 10:01:47,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-12 10:01:47,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 10:01:47,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:48,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:48,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:48,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:48,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:48,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:48,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:48,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:48,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:48,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:48,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:48,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3402 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3024 trivial. 0 not checked. [2020-10-12 10:01:48,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407520153] [2020-10-12 10:01:48,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:48,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 10:01:48,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765357211] [2020-10-12 10:01:48,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 10:01:48,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:48,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 10:01:48,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:01:48,038 INFO L87 Difference]: Start difference. First operand 277 states and 286 transitions. Second operand 31 states. [2020-10-12 10:01:48,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:48,736 INFO L93 Difference]: Finished difference Result 529 states and 555 transitions. [2020-10-12 10:01:48,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 10:01:48,737 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 272 [2020-10-12 10:01:48,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:48,739 INFO L225 Difference]: With dead ends: 529 [2020-10-12 10:01:48,739 INFO L226 Difference]: Without dead ends: 286 [2020-10-12 10:01:48,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:01:48,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-12 10:01:48,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2020-10-12 10:01:48,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-12 10:01:48,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 295 transitions. [2020-10-12 10:01:48,749 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 295 transitions. Word has length 272 [2020-10-12 10:01:48,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:48,749 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 295 transitions. [2020-10-12 10:01:48,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 10:01:48,749 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 295 transitions. [2020-10-12 10:01:48,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-10-12 10:01:48,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:48,751 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:48,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 10:01:48,751 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:48,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:48,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1057011922, now seen corresponding path program 28 times [2020-10-12 10:01:48,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:48,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170561532] [2020-10-12 10:01:48,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:48,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:48,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:49,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:49,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:49,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:51,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:53,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:53,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 289 [2020-10-12 10:01:53,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:01:53,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 10:01:53,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:53,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 10:01:53,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 161 [2020-10-12 10:01:53,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 10:01:53,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:54,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:54,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:54,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:54,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:54,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:54,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:54,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:54,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:54,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:54,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:54,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:54,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3654 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 3248 trivial. 0 not checked. [2020-10-12 10:01:54,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170561532] [2020-10-12 10:01:54,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:54,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 10:01:54,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205548221] [2020-10-12 10:01:54,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 10:01:54,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:54,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 10:01:54,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:01:54,404 INFO L87 Difference]: Start difference. First operand 286 states and 295 transitions. Second operand 32 states. [2020-10-12 10:01:55,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:55,149 INFO L93 Difference]: Finished difference Result 546 states and 572 transitions. [2020-10-12 10:01:55,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 10:01:55,150 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 281 [2020-10-12 10:01:55,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:55,153 INFO L225 Difference]: With dead ends: 546 [2020-10-12 10:01:55,153 INFO L226 Difference]: Without dead ends: 295 [2020-10-12 10:01:55,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:01:55,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-10-12 10:01:55,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2020-10-12 10:01:55,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-10-12 10:01:55,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 304 transitions. [2020-10-12 10:01:55,162 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 304 transitions. Word has length 281 [2020-10-12 10:01:55,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:55,163 INFO L479 AbstractCegarLoop]: Abstraction has 295 states and 304 transitions. [2020-10-12 10:01:55,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 10:01:55,163 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 304 transitions. [2020-10-12 10:01:55,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-10-12 10:01:55,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:55,165 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:55,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 10:01:55,165 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:55,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:55,166 INFO L82 PathProgramCache]: Analyzing trace with hash 392222394, now seen corresponding path program 29 times [2020-10-12 10:01:55,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:55,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346691719] [2020-10-12 10:01:55,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:55,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:55,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:55,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:55,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:55,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:57,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:00,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:00,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 298 [2020-10-12 10:02:00,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:02:00,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-12 10:02:00,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:00,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 10:02:00,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 135 [2020-10-12 10:02:00,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 10:02:00,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:00,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:00,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:00,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:00,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:00,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:00,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:00,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:00,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:00,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:00,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:00,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:00,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:00,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3915 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 3480 trivial. 0 not checked. [2020-10-12 10:02:00,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346691719] [2020-10-12 10:02:00,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:00,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 10:02:00,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419284002] [2020-10-12 10:02:00,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 10:02:00,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:00,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 10:02:00,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:02:00,886 INFO L87 Difference]: Start difference. First operand 295 states and 304 transitions. Second operand 33 states. [2020-10-12 10:02:01,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:01,665 INFO L93 Difference]: Finished difference Result 563 states and 589 transitions. [2020-10-12 10:02:01,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 10:02:01,666 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 290 [2020-10-12 10:02:01,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:01,667 INFO L225 Difference]: With dead ends: 563 [2020-10-12 10:02:01,667 INFO L226 Difference]: Without dead ends: 304 [2020-10-12 10:02:01,669 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 [2020-10-12 10:02:01,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-12 10:02:01,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2020-10-12 10:02:01,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-10-12 10:02:01,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 313 transitions. [2020-10-12 10:02:01,676 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 313 transitions. Word has length 290 [2020-10-12 10:02:01,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:01,676 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 313 transitions. [2020-10-12 10:02:01,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 10:02:01,676 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 313 transitions. [2020-10-12 10:02:01,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-12 10:02:01,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:01,679 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:01,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 10:02:01,679 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:01,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:01,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1369838126, now seen corresponding path program 30 times [2020-10-12 10:02:01,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:01,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222424341] [2020-10-12 10:02:01,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:01,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:01,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:01,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:02,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:02,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:04,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:06,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:06,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 307 [2020-10-12 10:02:06,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:02:06,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-12 10:02:06,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:06,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 10:02:06,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-12 10:02:06,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 10:02:06,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:07,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:07,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:07,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:07,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:07,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:07,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:07,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:07,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:07,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:07,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:07,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:07,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:07,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4185 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 3720 trivial. 0 not checked. [2020-10-12 10:02:07,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222424341] [2020-10-12 10:02:07,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:07,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 10:02:07,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086605513] [2020-10-12 10:02:07,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 10:02:07,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:07,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 10:02:07,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:02:07,423 INFO L87 Difference]: Start difference. First operand 304 states and 313 transitions. Second operand 34 states. [2020-10-12 10:02:08,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:08,213 INFO L93 Difference]: Finished difference Result 580 states and 606 transitions. [2020-10-12 10:02:08,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 10:02:08,214 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 299 [2020-10-12 10:02:08,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:08,216 INFO L225 Difference]: With dead ends: 580 [2020-10-12 10:02:08,216 INFO L226 Difference]: Without dead ends: 313 [2020-10-12 10:02:08,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:02:08,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-12 10:02:08,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2020-10-12 10:02:08,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-10-12 10:02:08,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 322 transitions. [2020-10-12 10:02:08,226 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 322 transitions. Word has length 299 [2020-10-12 10:02:08,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:08,227 INFO L479 AbstractCegarLoop]: Abstraction has 313 states and 322 transitions. [2020-10-12 10:02:08,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 10:02:08,227 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 322 transitions. [2020-10-12 10:02:08,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-10-12 10:02:08,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:08,229 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:08,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 10:02:08,229 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:08,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:08,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1043750074, now seen corresponding path program 31 times [2020-10-12 10:02:08,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:08,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929396971] [2020-10-12 10:02:08,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:08,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:08,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:08,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:08,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:08,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:10,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:13,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:13,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 316 [2020-10-12 10:02:13,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:02:13,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-12 10:02:13,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:13,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 10:02:13,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-12 10:02:13,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 10:02:13,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:14,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:14,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:14,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:14,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:14,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:14,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:14,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:14,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:14,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:14,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:14,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:14,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4464 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 3968 trivial. 0 not checked. [2020-10-12 10:02:14,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929396971] [2020-10-12 10:02:14,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:14,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 10:02:14,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634791313] [2020-10-12 10:02:14,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 10:02:14,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:14,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 10:02:14,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:02:14,050 INFO L87 Difference]: Start difference. First operand 313 states and 322 transitions. Second operand 35 states. [2020-10-12 10:02:14,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:14,770 INFO L93 Difference]: Finished difference Result 597 states and 623 transitions. [2020-10-12 10:02:14,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 10:02:14,771 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 308 [2020-10-12 10:02:14,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:14,773 INFO L225 Difference]: With dead ends: 597 [2020-10-12 10:02:14,773 INFO L226 Difference]: Without dead ends: 322 [2020-10-12 10:02:14,774 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 [2020-10-12 10:02:14,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-12 10:02:14,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2020-10-12 10:02:14,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-10-12 10:02:14,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 331 transitions. [2020-10-12 10:02:14,782 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 331 transitions. Word has length 308 [2020-10-12 10:02:14,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:14,783 INFO L479 AbstractCegarLoop]: Abstraction has 322 states and 331 transitions. [2020-10-12 10:02:14,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 10:02:14,783 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 331 transitions. [2020-10-12 10:02:14,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-12 10:02:14,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:14,787 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:14,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 10:02:14,788 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:14,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:14,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1909990098, now seen corresponding path program 32 times [2020-10-12 10:02:14,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:14,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164224111] [2020-10-12 10:02:14,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:14,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:14,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:15,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:15,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:15,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:15,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:19,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:19,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 325 [2020-10-12 10:02:19,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:02:19,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 10:02:19,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:19,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 10:02:19,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-12 10:02:19,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 10:02:19,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:20,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:20,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:20,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:20,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:20,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:20,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:20,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:20,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:20,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:20,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:20,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:20,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4752 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 4224 trivial. 0 not checked. [2020-10-12 10:02:20,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164224111] [2020-10-12 10:02:20,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:20,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 10:02:20,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381880213] [2020-10-12 10:02:20,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 10:02:20,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:20,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 10:02:20,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:02:20,626 INFO L87 Difference]: Start difference. First operand 322 states and 331 transitions. Second operand 36 states. [2020-10-12 10:02:21,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:21,491 INFO L93 Difference]: Finished difference Result 614 states and 640 transitions. [2020-10-12 10:02:21,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 10:02:21,492 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 317 [2020-10-12 10:02:21,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:21,494 INFO L225 Difference]: With dead ends: 614 [2020-10-12 10:02:21,494 INFO L226 Difference]: Without dead ends: 331 [2020-10-12 10:02:21,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:02:21,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-10-12 10:02:21,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2020-10-12 10:02:21,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-10-12 10:02:21,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 340 transitions. [2020-10-12 10:02:21,504 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 340 transitions. Word has length 317 [2020-10-12 10:02:21,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:21,504 INFO L479 AbstractCegarLoop]: Abstraction has 331 states and 340 transitions. [2020-10-12 10:02:21,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 10:02:21,504 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 340 transitions. [2020-10-12 10:02:21,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-10-12 10:02:21,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:21,507 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:21,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 10:02:21,507 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:21,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:21,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1823841606, now seen corresponding path program 33 times [2020-10-12 10:02:21,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:21,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701340531] [2020-10-12 10:02:21,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:21,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:21,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:21,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:22,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:22,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:22,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:25,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:26,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:26,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-10-12 10:02:26,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:02:26,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-12 10:02:26,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:26,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 10:02:26,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:02:26,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 10:02:26,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:27,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:27,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:27,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:27,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:27,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:27,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:27,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:27,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:27,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:27,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:27,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 5049 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 4488 trivial. 0 not checked. [2020-10-12 10:02:27,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701340531] [2020-10-12 10:02:27,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:27,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 10:02:27,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782265884] [2020-10-12 10:02:27,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 10:02:27,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:27,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 10:02:27,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:02:27,391 INFO L87 Difference]: Start difference. First operand 331 states and 340 transitions. Second operand 37 states. [2020-10-12 10:02:28,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:28,288 INFO L93 Difference]: Finished difference Result 631 states and 657 transitions. [2020-10-12 10:02:28,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 10:02:28,288 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 326 [2020-10-12 10:02:28,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:28,291 INFO L225 Difference]: With dead ends: 631 [2020-10-12 10:02:28,291 INFO L226 Difference]: Without dead ends: 340 [2020-10-12 10:02:28,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:02:28,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-10-12 10:02:28,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2020-10-12 10:02:28,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-10-12 10:02:28,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 349 transitions. [2020-10-12 10:02:28,300 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 349 transitions. Word has length 326 [2020-10-12 10:02:28,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:28,301 INFO L479 AbstractCegarLoop]: Abstraction has 340 states and 349 transitions. [2020-10-12 10:02:28,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 10:02:28,301 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 349 transitions. [2020-10-12 10:02:28,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-12 10:02:28,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:28,303 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:28,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 10:02:28,304 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:28,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:28,304 INFO L82 PathProgramCache]: Analyzing trace with hash 359880658, now seen corresponding path program 34 times [2020-10-12 10:02:28,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:28,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498468203] [2020-10-12 10:02:28,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:28,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:28,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:28,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:28,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:28,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:29,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:31,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:33,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:33,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 343 [2020-10-12 10:02:33,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:02:33,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 10:02:33,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:33,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 10:02:33,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 191 [2020-10-12 10:02:33,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 10:02:33,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:34,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:34,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:34,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:34,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:34,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:34,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:34,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:34,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:34,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:34,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:34,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:34,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5355 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 4760 trivial. 0 not checked. [2020-10-12 10:02:34,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498468203] [2020-10-12 10:02:34,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:34,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 10:02:34,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256500671] [2020-10-12 10:02:34,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 10:02:34,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:34,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 10:02:34,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 10:02:34,227 INFO L87 Difference]: Start difference. First operand 340 states and 349 transitions. Second operand 38 states. [2020-10-12 10:02:35,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:35,030 INFO L93 Difference]: Finished difference Result 648 states and 674 transitions. [2020-10-12 10:02:35,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 10:02:35,031 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 335 [2020-10-12 10:02:35,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:35,033 INFO L225 Difference]: With dead ends: 648 [2020-10-12 10:02:35,033 INFO L226 Difference]: Without dead ends: 349 [2020-10-12 10:02:35,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 10:02:35,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-10-12 10:02:35,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2020-10-12 10:02:35,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-12 10:02:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 358 transitions. [2020-10-12 10:02:35,041 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 358 transitions. Word has length 335 [2020-10-12 10:02:35,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:35,042 INFO L479 AbstractCegarLoop]: Abstraction has 349 states and 358 transitions. [2020-10-12 10:02:35,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 10:02:35,042 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 358 transitions. [2020-10-12 10:02:35,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-10-12 10:02:35,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:35,044 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:35,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 10:02:35,044 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:35,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:35,045 INFO L82 PathProgramCache]: Analyzing trace with hash 673507514, now seen corresponding path program 35 times [2020-10-12 10:02:35,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:35,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112652689] [2020-10-12 10:02:35,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:35,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:35,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:35,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:35,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:35,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:35,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:38,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:40,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:40,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 352 [2020-10-12 10:02:40,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:02:40,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5068 [2020-10-12 10:02:40,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:40,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 10:02:40,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 196 [2020-10-12 10:02:40,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 10:02:40,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:41,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:41,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:41,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:41,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:41,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:41,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:41,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:41,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:41,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:41,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:41,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:41,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:41,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5670 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 5040 trivial. 0 not checked. [2020-10-12 10:02:41,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112652689] [2020-10-12 10:02:41,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:41,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 10:02:41,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540617973] [2020-10-12 10:02:41,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 10:02:41,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:41,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 10:02:41,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:02:41,096 INFO L87 Difference]: Start difference. First operand 349 states and 358 transitions. Second operand 39 states. [2020-10-12 10:02:41,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:41,926 INFO L93 Difference]: Finished difference Result 665 states and 691 transitions. [2020-10-12 10:02:41,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 10:02:41,927 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 344 [2020-10-12 10:02:41,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:41,929 INFO L225 Difference]: With dead ends: 665 [2020-10-12 10:02:41,929 INFO L226 Difference]: Without dead ends: 358 [2020-10-12 10:02:41,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:02:41,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-12 10:02:41,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2020-10-12 10:02:41,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-10-12 10:02:41,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 367 transitions. [2020-10-12 10:02:41,938 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 367 transitions. Word has length 344 [2020-10-12 10:02:41,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:41,938 INFO L479 AbstractCegarLoop]: Abstraction has 358 states and 367 transitions. [2020-10-12 10:02:41,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 10:02:41,939 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 367 transitions. [2020-10-12 10:02:41,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-10-12 10:02:41,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:41,941 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:41,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 10:02:41,941 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:41,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:41,942 INFO L82 PathProgramCache]: Analyzing trace with hash 287542482, now seen corresponding path program 36 times [2020-10-12 10:02:41,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:41,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593212538] [2020-10-12 10:02:41,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:41,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:42,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:42,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:42,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:42,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:46,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:46,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 361 [2020-10-12 10:02:46,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:02:46,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-12 10:02:46,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:46,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 10:02:46,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-12 10:02:46,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 10:02:46,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:47,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:47,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:47,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:47,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:47,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:47,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:47,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:02:47,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:47,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:47,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:47,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:47,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5994 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 5328 trivial. 0 not checked. [2020-10-12 10:02:47,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593212538] [2020-10-12 10:02:47,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:47,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 10:02:47,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155995796] [2020-10-12 10:02:47,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 10:02:47,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:47,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 10:02:47,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 10:02:47,948 INFO L87 Difference]: Start difference. First operand 358 states and 367 transitions. Second operand 40 states. [2020-10-12 10:02:48,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:48,933 INFO L93 Difference]: Finished difference Result 682 states and 708 transitions. [2020-10-12 10:02:48,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 10:02:48,934 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 353 [2020-10-12 10:02:48,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:48,936 INFO L225 Difference]: With dead ends: 682 [2020-10-12 10:02:48,936 INFO L226 Difference]: Without dead ends: 367 [2020-10-12 10:02:48,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 10:02:48,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-12 10:02:48,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2020-10-12 10:02:48,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-10-12 10:02:48,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 376 transitions. [2020-10-12 10:02:48,946 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 376 transitions. Word has length 353 [2020-10-12 10:02:48,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:48,946 INFO L479 AbstractCegarLoop]: Abstraction has 367 states and 376 transitions. [2020-10-12 10:02:48,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 10:02:48,947 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 376 transitions. [2020-10-12 10:02:48,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2020-10-12 10:02:48,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:48,949 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:48,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 10:02:48,949 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:48,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:48,950 INFO L82 PathProgramCache]: Analyzing trace with hash -2108821830, now seen corresponding path program 37 times [2020-10-12 10:02:48,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:48,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194032580] [2020-10-12 10:02:48,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:48,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:49,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:49,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:49,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:49,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:53,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:54,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:54,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 370 [2020-10-12 10:02:54,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:02:54,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-12 10:02:54,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:54,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 10:02:54,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 167 [2020-10-12 10:02:54,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 10:02:54,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:54,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:54,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:54,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:54,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:54,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:54,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:54,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:02:54,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:54,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:54,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:54,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:54,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:55,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6327 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 5624 trivial. 0 not checked. [2020-10-12 10:02:55,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194032580] [2020-10-12 10:02:55,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:55,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 10:02:55,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903452792] [2020-10-12 10:02:55,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 10:02:55,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:55,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 10:02:55,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:02:55,037 INFO L87 Difference]: Start difference. First operand 367 states and 376 transitions. Second operand 41 states. [2020-10-12 10:02:56,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:56,052 INFO L93 Difference]: Finished difference Result 699 states and 725 transitions. [2020-10-12 10:02:56,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 10:02:56,052 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 362 [2020-10-12 10:02:56,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:56,054 INFO L225 Difference]: With dead ends: 699 [2020-10-12 10:02:56,054 INFO L226 Difference]: Without dead ends: 376 [2020-10-12 10:02:56,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:02:56,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-10-12 10:02:56,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2020-10-12 10:02:56,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-10-12 10:02:56,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 385 transitions. [2020-10-12 10:02:56,064 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 385 transitions. Word has length 362 [2020-10-12 10:02:56,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:56,065 INFO L479 AbstractCegarLoop]: Abstraction has 376 states and 385 transitions. [2020-10-12 10:02:56,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 10:02:56,065 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 385 transitions. [2020-10-12 10:02:56,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2020-10-12 10:02:56,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:56,067 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:56,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 10:02:56,068 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:56,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:56,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1222689234, now seen corresponding path program 38 times [2020-10-12 10:02:56,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:56,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60528603] [2020-10-12 10:02:56,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:56,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:56,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:56,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:56,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:56,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:57,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:00,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:01,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:03:01,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 379 [2020-10-12 10:03:01,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:03:01,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 10:03:01,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:03:01,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 10:03:01,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 171 [2020-10-12 10:03:01,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 10:03:01,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:03:02,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:03:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:03:02,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:02,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:03:02,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:03:02,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:03:02,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:03:02,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:03:02,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:03:02,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:03:02,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:03:02,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:03:02,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6669 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 5928 trivial. 0 not checked. [2020-10-12 10:03:02,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60528603] [2020-10-12 10:03:02,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:03:02,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 10:03:02,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084919613] [2020-10-12 10:03:02,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 10:03:02,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:03:02,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 10:03:02,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 10:03:02,169 INFO L87 Difference]: Start difference. First operand 376 states and 385 transitions. Second operand 42 states. [2020-10-12 10:03:03,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:03:03,085 INFO L93 Difference]: Finished difference Result 716 states and 742 transitions. [2020-10-12 10:03:03,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 10:03:03,086 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 371 [2020-10-12 10:03:03,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:03:03,088 INFO L225 Difference]: With dead ends: 716 [2020-10-12 10:03:03,088 INFO L226 Difference]: Without dead ends: 385 [2020-10-12 10:03:03,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 10:03:03,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-10-12 10:03:03,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2020-10-12 10:03:03,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-12 10:03:03,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 394 transitions. [2020-10-12 10:03:03,097 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 394 transitions. Word has length 371 [2020-10-12 10:03:03,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:03:03,098 INFO L479 AbstractCegarLoop]: Abstraction has 385 states and 394 transitions. [2020-10-12 10:03:03,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 10:03:03,098 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 394 transitions. [2020-10-12 10:03:03,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2020-10-12 10:03:03,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:03:03,100 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:03:03,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 10:03:03,100 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:03:03,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:03:03,101 INFO L82 PathProgramCache]: Analyzing trace with hash 458060986, now seen corresponding path program 39 times [2020-10-12 10:03:03,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:03:03,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563493168] [2020-10-12 10:03:03,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:03:03,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:03:03,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:03,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:03,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:03,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:04,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:08,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:08,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:03:08,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 388 [2020-10-12 10:03:08,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:03:08,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5075 [2020-10-12 10:03:08,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:03:08,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 10:03:08,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-12 10:03:08,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 10:03:08,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:03:09,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:03:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:03:09,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:09,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:03:09,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:03:09,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:03:09,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:03:09,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:03:09,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:03:09,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:03:09,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:03:09,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:03:09,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7020 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 6240 trivial. 0 not checked. [2020-10-12 10:03:09,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563493168] [2020-10-12 10:03:09,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:03:09,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 10:03:09,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692200213] [2020-10-12 10:03:09,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 10:03:09,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:03:09,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 10:03:09,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 10:03:09,378 INFO L87 Difference]: Start difference. First operand 385 states and 394 transitions. Second operand 43 states. [2020-10-12 10:03:10,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:03:10,448 INFO L93 Difference]: Finished difference Result 733 states and 759 transitions. [2020-10-12 10:03:10,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 10:03:10,449 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 380 [2020-10-12 10:03:10,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:03:10,452 INFO L225 Difference]: With dead ends: 733 [2020-10-12 10:03:10,452 INFO L226 Difference]: Without dead ends: 394 [2020-10-12 10:03:10,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 10:03:10,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-10-12 10:03:10,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2020-10-12 10:03:10,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-12 10:03:10,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 403 transitions. [2020-10-12 10:03:10,463 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 403 transitions. Word has length 380 [2020-10-12 10:03:10,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:03:10,463 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 403 transitions. [2020-10-12 10:03:10,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 10:03:10,463 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 403 transitions. [2020-10-12 10:03:10,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-10-12 10:03:10,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:03:10,466 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:03:10,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 10:03:10,467 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:03:10,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:03:10,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1935477038, now seen corresponding path program 40 times [2020-10-12 10:03:10,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:03:10,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569691208] [2020-10-12 10:03:10,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:03:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:03:10,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:10,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:11,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:11,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:11,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking...