/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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/loops-crafted-1/in-de42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 23:57:51,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:57:51,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:57:52,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:57:52,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:57:52,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:57:52,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:57:52,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:57:52,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:57:52,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:57:52,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:57:52,030 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:57:52,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:57:52,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:57:52,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:57:52,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:57:52,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:57:52,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:57:52,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:57:52,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:57:52,049 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:57:52,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:57:52,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:57:52,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:57:52,065 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:57:52,066 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:57:52,066 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:57:52,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:57:52,070 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:57:52,071 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:57:52,071 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:57:52,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:57:52,076 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:57:52,077 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:57:52,080 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:57:52,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:57:52,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:57:52,081 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:57:52,081 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:57:52,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:57:52,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:57:52,086 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 [2020-10-14 23:57:52,123 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:57:52,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:57:52,125 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:57:52,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:57:52,126 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:57:52,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:57:52,126 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:57:52,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:57:52,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:57:52,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:57:52,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:57:52,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:57:52,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:57:52,129 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:57:52,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:57:52,130 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:57:52,130 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:57:52,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:57:52,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:57:52,131 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:57:52,131 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:57:52,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:57:52,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:57:52,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:57:52,132 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:57:52,132 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:57:52,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:57:52,132 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:57:52,132 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:57:52,132 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:57:52,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:57:52,452 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:57:52,456 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:57:52,458 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:57:52,458 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:57:52,459 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de42.c [2020-10-14 23:57:52,518 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e61d8b443/aaae6a168ccc4381861789a1a042f4b1/FLAG9a3703b1c [2020-10-14 23:57:52,945 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:57:52,946 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de42.c [2020-10-14 23:57:52,952 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e61d8b443/aaae6a168ccc4381861789a1a042f4b1/FLAG9a3703b1c [2020-10-14 23:57:53,300 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e61d8b443/aaae6a168ccc4381861789a1a042f4b1 [2020-10-14 23:57:53,308 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:57:53,310 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:57:53,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:57:53,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:57:53,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:57:53,316 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:57:53" (1/1) ... [2020-10-14 23:57:53,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39b6dc93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:53, skipping insertion in model container [2020-10-14 23:57:53,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:57:53" (1/1) ... [2020-10-14 23:57:53,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:57:53,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:57:53,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:57:53,513 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:57:53,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:57:53,548 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:57:53,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:53 WrapperNode [2020-10-14 23:57:53,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:57:53,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:57:53,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:57:53,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:57:53,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:53" (1/1) ... [2020-10-14 23:57:53,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:53" (1/1) ... [2020-10-14 23:57:53,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:53" (1/1) ... [2020-10-14 23:57:53,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:53" (1/1) ... [2020-10-14 23:57:53,662 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:53" (1/1) ... [2020-10-14 23:57:53,669 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:53" (1/1) ... [2020-10-14 23:57:53,670 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:53" (1/1) ... [2020-10-14 23:57:53,672 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:57:53,672 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:57:53,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:57:53,673 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:57:53,674 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:53" (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 [2020-10-14 23:57:53,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:57:53,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:57:53,738 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 23:57:53,738 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:57:53,738 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:57:53,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-14 23:57:53,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 23:57:53,739 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:57:53,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:57:53,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:57:53,957 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:57:53,957 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-14 23:57:53,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:57:53 BoogieIcfgContainer [2020-10-14 23:57:53,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:57:53,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:57:53,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:57:53,969 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:57:53,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:57:53" (1/3) ... [2020-10-14 23:57:53,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17dc0e4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:57:53, skipping insertion in model container [2020-10-14 23:57:53,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:53" (2/3) ... [2020-10-14 23:57:53,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17dc0e4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:57:53, skipping insertion in model container [2020-10-14 23:57:53,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:57:53" (3/3) ... [2020-10-14 23:57:53,972 INFO L109 eAbstractionObserver]: Analyzing ICFG in-de42.c [2020-10-14 23:57:53,984 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:57:53,992 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:57:54,007 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:57:54,034 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:57:54,034 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:57:54,034 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:57:54,035 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:57:54,035 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:57:54,035 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:57:54,035 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:57:54,035 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:57:54,064 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-14 23:57:54,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 23:57:54,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:54,075 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:54,076 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:54,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:54,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1870796656, now seen corresponding path program 1 times [2020-10-14 23:57:54,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:54,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418210760] [2020-10-14 23:57:54,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:54,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:54,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:54,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:54,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:54,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 23:57:54,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:54,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-10-14 23:57:54,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:54,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:54,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:57:54,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:54,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:57:54,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 23:57:54,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:54,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:54,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:54,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:54,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:54,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:57:54,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:54,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:54,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:54,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:54,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:54,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:57:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:54,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418210760] [2020-10-14 23:57:54,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:57:54,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-14 23:57:54,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317248688] [2020-10-14 23:57:54,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:57:54,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:54,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:57:54,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:57:54,963 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 7 states. [2020-10-14 23:57:55,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:55,124 INFO L93 Difference]: Finished difference Result 57 states and 88 transitions. [2020-10-14 23:57:55,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:57:55,126 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-14 23:57:55,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:55,138 INFO L225 Difference]: With dead ends: 57 [2020-10-14 23:57:55,139 INFO L226 Difference]: Without dead ends: 23 [2020-10-14 23:57:55,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:57:55,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-14 23:57:55,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-10-14 23:57:55,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 23:57:55,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2020-10-14 23:57:55,189 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 14 [2020-10-14 23:57:55,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:55,190 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-14 23:57:55,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:57:55,190 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2020-10-14 23:57:55,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 23:57:55,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:55,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:55,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:57:55,192 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:55,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:55,193 INFO L82 PathProgramCache]: Analyzing trace with hash 2081142662, now seen corresponding path program 1 times [2020-10-14 23:57:55,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:55,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512297730] [2020-10-14 23:57:55,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:55,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:55,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:55,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:55,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 23:57:55,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:55,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-14 23:57:55,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:55,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:55,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:57:55,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:57:55,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 23:57:55,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:55,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:55,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:55,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:55,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:55,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:55,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:55,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:55,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:55,272 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:55,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:55,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:55,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:55,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 23:57:55,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:55,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512297730] [2020-10-14 23:57:55,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:57:55,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 23:57:55,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578579314] [2020-10-14 23:57:55,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 23:57:55,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:55,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 23:57:55,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:57:55,284 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand 3 states. [2020-10-14 23:57:55,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:55,307 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2020-10-14 23:57:55,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 23:57:55,308 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-14 23:57:55,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:55,322 INFO L225 Difference]: With dead ends: 32 [2020-10-14 23:57:55,323 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 23:57:55,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:57:55,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 23:57:55,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-14 23:57:55,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 23:57:55,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2020-10-14 23:57:55,333 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 15 [2020-10-14 23:57:55,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:55,333 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2020-10-14 23:57:55,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 23:57:55,333 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2020-10-14 23:57:55,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 23:57:55,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:55,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:55,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 23:57:55,335 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:55,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:55,335 INFO L82 PathProgramCache]: Analyzing trace with hash -810996235, now seen corresponding path program 1 times [2020-10-14 23:57:55,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:55,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003158003] [2020-10-14 23:57:55,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:55,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:55,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:55,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:55,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 23:57:55,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:57:55,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-14 23:57:55,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:55,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:55,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:57:55,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:55,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 23:57:55,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:55,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:55,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:55,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:55,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:55,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:55,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:55,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:57:55,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:55,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:55,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:55,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:55,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:55,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:55,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:55,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003158003] [2020-10-14 23:57:55,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:57:55,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 23:57:55,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106921118] [2020-10-14 23:57:55,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 23:57:55,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:55,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 23:57:55,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:57:55,497 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 3 states. [2020-10-14 23:57:55,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:55,514 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2020-10-14 23:57:55,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 23:57:55,515 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-14 23:57:55,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:55,516 INFO L225 Difference]: With dead ends: 36 [2020-10-14 23:57:55,516 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 23:57:55,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 23:57:55,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 23:57:55,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-10-14 23:57:55,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-14 23:57:55,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2020-10-14 23:57:55,524 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 15 [2020-10-14 23:57:55,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:55,524 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2020-10-14 23:57:55,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 23:57:55,524 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2020-10-14 23:57:55,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 23:57:55,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:55,525 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:55,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 23:57:55,526 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:55,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:55,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1211614777, now seen corresponding path program 1 times [2020-10-14 23:57:55,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:55,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922331313] [2020-10-14 23:57:55,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:55,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:55,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:55,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:55,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-14 23:57:55,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:57:55,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-14 23:57:55,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:55,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:55,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:57:55,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:55,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 23:57:55,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:55,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:55,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:55,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:55,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:55,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:55,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:55,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:55,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:55,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:55,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:55,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:55,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:55,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:55,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922331313] [2020-10-14 23:57:55,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:55,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 23:57:55,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691701238] [2020-10-14 23:57:55,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:57:55,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:55,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:57:55,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:57:55,663 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 4 states. [2020-10-14 23:57:55,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:55,691 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-10-14 23:57:55,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:57:55,692 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-14 23:57:55,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:55,693 INFO L225 Difference]: With dead ends: 39 [2020-10-14 23:57:55,693 INFO L226 Difference]: Without dead ends: 32 [2020-10-14 23:57:55,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:57:55,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-14 23:57:55,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-14 23:57:55,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-14 23:57:55,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2020-10-14 23:57:55,701 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 15 [2020-10-14 23:57:55,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:55,701 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2020-10-14 23:57:55,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:57:55,702 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2020-10-14 23:57:55,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:57:55,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:55,703 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:55,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 23:57:55,703 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:55,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:55,704 INFO L82 PathProgramCache]: Analyzing trace with hash 162818764, now seen corresponding path program 1 times [2020-10-14 23:57:55,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:55,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090384804] [2020-10-14 23:57:55,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:55,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:55,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:55,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:55,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:57:55,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:57:55,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-14 23:57:55,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:55,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:55,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:57:55,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:55,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 23:57:55,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:55,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:55,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:55,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:55,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:55,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:55,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:55,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:55,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:55,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:55,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:55,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:55,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:55,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:57:55,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090384804] [2020-10-14 23:57:55,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:57:55,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 23:57:55,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612243620] [2020-10-14 23:57:55,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:57:55,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:55,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:57:55,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:57:55,789 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand 4 states. [2020-10-14 23:57:55,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:55,824 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2020-10-14 23:57:55,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:57:55,825 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-14 23:57:55,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:55,826 INFO L225 Difference]: With dead ends: 36 [2020-10-14 23:57:55,826 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 23:57:55,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:57:55,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 23:57:55,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-14 23:57:55,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 23:57:55,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2020-10-14 23:57:55,833 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 16 [2020-10-14 23:57:55,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:55,833 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2020-10-14 23:57:55,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:57:55,834 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2020-10-14 23:57:55,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:57:55,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:55,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:55,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 23:57:55,835 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:55,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:55,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1761953542, now seen corresponding path program 1 times [2020-10-14 23:57:55,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:55,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785992348] [2020-10-14 23:57:55,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:55,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:55,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:55,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:55,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:56,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:56,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:56,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:57:56,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:57:56,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-14 23:57:56,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:56,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:56,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:57:56,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:56,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 23:57:56,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:56,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:56,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:56,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:56,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:56,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:56,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:56,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:56,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:56,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:56,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:56,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:56,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:56,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785992348] [2020-10-14 23:57:56,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:56,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:57:56,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854975931] [2020-10-14 23:57:56,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:57:56,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:56,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:57:56,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:57:56,593 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand 9 states. [2020-10-14 23:57:56,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:56,837 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2020-10-14 23:57:56,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:57:56,838 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-10-14 23:57:56,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:56,839 INFO L225 Difference]: With dead ends: 32 [2020-10-14 23:57:56,839 INFO L226 Difference]: Without dead ends: 24 [2020-10-14 23:57:56,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:57:56,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-14 23:57:56,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-14 23:57:56,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-14 23:57:56,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2020-10-14 23:57:56,845 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 16 [2020-10-14 23:57:56,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:56,846 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2020-10-14 23:57:56,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:57:56,846 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2020-10-14 23:57:56,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 23:57:56,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:56,847 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:56,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 23:57:56,847 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:56,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:56,848 INFO L82 PathProgramCache]: Analyzing trace with hash 2132395212, now seen corresponding path program 2 times [2020-10-14 23:57:56,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:56,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717063844] [2020-10-14 23:57:56,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:56,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:56,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:56,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:56,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:56,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 23:57:56,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:57:56,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-14 23:57:56,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:56,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:56,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:57:56,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:56,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 23:57:56,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:56,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:56,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:56,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:56,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:56,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:56,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:56,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:56,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:56,961 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:56,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:56,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:56,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:56,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:56,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717063844] [2020-10-14 23:57:56,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:56,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:57:56,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882618573] [2020-10-14 23:57:56,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:57:56,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:56,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:57:56,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:57:56,966 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 5 states. [2020-10-14 23:57:57,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:57,003 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2020-10-14 23:57:57,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:57:57,003 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-14 23:57:57,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:57,004 INFO L225 Difference]: With dead ends: 41 [2020-10-14 23:57:57,004 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 23:57:57,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:57:57,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 23:57:57,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-14 23:57:57,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 23:57:57,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2020-10-14 23:57:57,012 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 16 [2020-10-14 23:57:57,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:57,012 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2020-10-14 23:57:57,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:57:57,012 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2020-10-14 23:57:57,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 23:57:57,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:57,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:57,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 23:57:57,013 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:57,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:57,014 INFO L82 PathProgramCache]: Analyzing trace with hash -2144225578, now seen corresponding path program 1 times [2020-10-14 23:57:57,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:57,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103998843] [2020-10-14 23:57:57,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:57,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:57,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:57,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:57,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 23:57:57,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:57:57,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-14 23:57:57,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:57,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:57,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 23:57:57,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:57:57,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:57:57,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:57,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:57,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:57,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:57,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:57,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:57,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:57,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 23:57:57,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:57,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:57,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:57,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:57,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:57,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:57:57,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103998843] [2020-10-14 23:57:57,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:57,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 23:57:57,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693240188] [2020-10-14 23:57:57,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:57:57,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:57,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:57:57,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:57:57,123 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand 4 states. [2020-10-14 23:57:57,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:57,170 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2020-10-14 23:57:57,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:57:57,170 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-14 23:57:57,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:57,171 INFO L225 Difference]: With dead ends: 45 [2020-10-14 23:57:57,171 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 23:57:57,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:57:57,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 23:57:57,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-14 23:57:57,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 23:57:57,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2020-10-14 23:57:57,179 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 17 [2020-10-14 23:57:57,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:57,179 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2020-10-14 23:57:57,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:57:57,180 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2020-10-14 23:57:57,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 23:57:57,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:57,181 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:57,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 23:57:57,181 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:57,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:57,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1176858987, now seen corresponding path program 2 times [2020-10-14 23:57:57,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:57,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539638145] [2020-10-14 23:57:57,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:57,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:57,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:57,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:57,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:57,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 23:57:57,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:57,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-14 23:57:57,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:57,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:57,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:57:57,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:57,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:57:57,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:57,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:57,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:57,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:57,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:57,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:57,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:57,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:57,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:57,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:57,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:57,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:57,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:57,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:57,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:57:57,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539638145] [2020-10-14 23:57:57,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:57,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:57:57,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083515558] [2020-10-14 23:57:57,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:57:57,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:57,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:57:57,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:57:57,459 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 6 states. [2020-10-14 23:57:57,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:57,515 INFO L93 Difference]: Finished difference Result 68 states and 99 transitions. [2020-10-14 23:57:57,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:57:57,515 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-14 23:57:57,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:57,517 INFO L225 Difference]: With dead ends: 68 [2020-10-14 23:57:57,517 INFO L226 Difference]: Without dead ends: 57 [2020-10-14 23:57:57,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:57:57,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-14 23:57:57,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2020-10-14 23:57:57,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-14 23:57:57,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 67 transitions. [2020-10-14 23:57:57,533 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 67 transitions. Word has length 17 [2020-10-14 23:57:57,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:57,534 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 67 transitions. [2020-10-14 23:57:57,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:57:57,534 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 67 transitions. [2020-10-14 23:57:57,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:57:57,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:57,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:57,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 23:57:57,539 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:57,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:57,541 INFO L82 PathProgramCache]: Analyzing trace with hash -2010945700, now seen corresponding path program 1 times [2020-10-14 23:57:57,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:57,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882650747] [2020-10-14 23:57:57,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:57,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:57,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:57,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:57,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:57,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:58,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:58,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:57:58,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:57:58,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 623 [2020-10-14 23:57:58,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:58,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:58,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:57:58,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:58,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:57:58,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:58,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:58,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:58,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:58,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:58,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:58,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:58,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:58,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:58,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:58,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:58,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:58,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:58,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:57:58,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882650747] [2020-10-14 23:57:58,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:58,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:57:58,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250181386] [2020-10-14 23:57:58,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:57:58,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:58,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:57:58,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:57:58,479 INFO L87 Difference]: Start difference. First operand 49 states and 67 transitions. Second operand 10 states. [2020-10-14 23:57:58,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:58,763 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2020-10-14 23:57:58,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 23:57:58,764 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-14 23:57:58,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:58,765 INFO L225 Difference]: With dead ends: 64 [2020-10-14 23:57:58,765 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 23:57:58,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-14 23:57:58,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 23:57:58,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2020-10-14 23:57:58,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 23:57:58,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 74 transitions. [2020-10-14 23:57:58,773 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 74 transitions. Word has length 18 [2020-10-14 23:57:58,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:58,774 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 74 transitions. [2020-10-14 23:57:58,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:57:58,774 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 74 transitions. [2020-10-14 23:57:58,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:57:58,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:58,775 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:58,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 23:57:58,775 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:58,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:58,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1109756806, now seen corresponding path program 2 times [2020-10-14 23:57:58,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:58,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997855500] [2020-10-14 23:57:58,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:58,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:58,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:58,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:59,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:59,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:57:59,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:57:59,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 341 [2020-10-14 23:57:59,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:59,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:59,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 23:57:59,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 23:57:59,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:57:59,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:59,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:57:59,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:59,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:59,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:59,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:57:59,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:57:59,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:57:59,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:59,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:59,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:57:59,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:57:59,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:57:59,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:57:59,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:57:59,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997855500] [2020-10-14 23:57:59,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:57:59,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 23:57:59,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113290194] [2020-10-14 23:57:59,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 23:57:59,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:57:59,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 23:57:59,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:57:59,173 INFO L87 Difference]: Start difference. First operand 55 states and 74 transitions. Second operand 5 states. [2020-10-14 23:57:59,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:57:59,227 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2020-10-14 23:57:59,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 23:57:59,228 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-14 23:57:59,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:57:59,229 INFO L225 Difference]: With dead ends: 77 [2020-10-14 23:57:59,229 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 23:57:59,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 23:57:59,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 23:57:59,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-10-14 23:57:59,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 23:57:59,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 88 transitions. [2020-10-14 23:57:59,239 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 88 transitions. Word has length 18 [2020-10-14 23:57:59,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:57:59,239 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 88 transitions. [2020-10-14 23:57:59,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 23:57:59,239 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 88 transitions. [2020-10-14 23:57:59,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:57:59,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:57:59,240 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:57:59,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 23:57:59,241 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:57:59,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:57:59,241 INFO L82 PathProgramCache]: Analyzing trace with hash -684524052, now seen corresponding path program 3 times [2020-10-14 23:57:59,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:57:59,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108503035] [2020-10-14 23:57:59,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:57:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:57:59,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:59,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:59,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:59,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:57:59,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:57:59,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:57:59,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:57:59,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-10-14 23:57:59,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:57:59,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:57:59,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 23:57:59,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:57:59,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 23:57:59,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:01,720 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 22 [2020-10-14 23:58:01,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:01,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:01,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:01,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:01,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:01,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:01,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:01,942 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:01,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:01,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:01,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:01,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:01,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108503035] [2020-10-14 23:58:01,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:01,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 23:58:01,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976353024] [2020-10-14 23:58:01,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 23:58:01,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:01,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 23:58:01,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:58:01,947 INFO L87 Difference]: Start difference. First operand 65 states and 88 transitions. Second operand 11 states. [2020-10-14 23:58:04,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:04,264 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2020-10-14 23:58:04,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:58:04,265 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2020-10-14 23:58:04,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:04,266 INFO L225 Difference]: With dead ends: 71 [2020-10-14 23:58:04,266 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 23:58:04,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:58:04,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 23:58:04,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-14 23:58:04,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-14 23:58:04,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 84 transitions. [2020-10-14 23:58:04,276 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 84 transitions. Word has length 18 [2020-10-14 23:58:04,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:04,277 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 84 transitions. [2020-10-14 23:58:04,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 23:58:04,277 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 84 transitions. [2020-10-14 23:58:04,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 23:58:04,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:04,278 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:04,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 23:58:04,278 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:04,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:04,279 INFO L82 PathProgramCache]: Analyzing trace with hash -218796966, now seen corresponding path program 4 times [2020-10-14 23:58:04,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:04,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902694423] [2020-10-14 23:58:04,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:04,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:04,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:04,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:04,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:04,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:04,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 23:58:04,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:04,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-14 23:58:04,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:04,519 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:04,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:58:04,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:04,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:58:04,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:04,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:04,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:04,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:04,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:04,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:04,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:04,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:04,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:04,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:04,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:04,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:04,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 23:58:04,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:04,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902694423] [2020-10-14 23:58:04,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:04,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:58:04,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478361914] [2020-10-14 23:58:04,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:58:04,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:04,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:58:04,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:58:04,640 INFO L87 Difference]: Start difference. First operand 62 states and 84 transitions. Second operand 7 states. [2020-10-14 23:58:04,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:04,726 INFO L93 Difference]: Finished difference Result 102 states and 150 transitions. [2020-10-14 23:58:04,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:58:04,727 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-14 23:58:04,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:04,728 INFO L225 Difference]: With dead ends: 102 [2020-10-14 23:58:04,729 INFO L226 Difference]: Without dead ends: 89 [2020-10-14 23:58:04,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:58:04,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-14 23:58:04,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2020-10-14 23:58:04,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-14 23:58:04,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 102 transitions. [2020-10-14 23:58:04,758 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 102 transitions. Word has length 18 [2020-10-14 23:58:04,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:04,758 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 102 transitions. [2020-10-14 23:58:04,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:58:04,759 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 102 transitions. [2020-10-14 23:58:04,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 23:58:04,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:04,763 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:04,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 23:58:04,764 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:04,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:04,766 INFO L82 PathProgramCache]: Analyzing trace with hash 894004054, now seen corresponding path program 3 times [2020-10-14 23:58:04,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:04,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264885150] [2020-10-14 23:58:04,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:04,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:04,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:04,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:05,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:05,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:58:05,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:05,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 406 [2020-10-14 23:58:05,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:05,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:05,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:58:05,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 23:58:05,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 23:58:05,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:05,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:05,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:05,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:05,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:05,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:05,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:05,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:05,244 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:05,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:05,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:05,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:05,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 23:58:05,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264885150] [2020-10-14 23:58:05,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:05,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:58:05,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611549942] [2020-10-14 23:58:05,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:58:05,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:05,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:58:05,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:58:05,250 INFO L87 Difference]: Start difference. First operand 75 states and 102 transitions. Second operand 6 states. [2020-10-14 23:58:05,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:05,330 INFO L93 Difference]: Finished difference Result 100 states and 137 transitions. [2020-10-14 23:58:05,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:58:05,331 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-14 23:58:05,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:05,332 INFO L225 Difference]: With dead ends: 100 [2020-10-14 23:58:05,332 INFO L226 Difference]: Without dead ends: 94 [2020-10-14 23:58:05,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:58:05,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-14 23:58:05,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2020-10-14 23:58:05,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 23:58:05,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 120 transitions. [2020-10-14 23:58:05,341 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 120 transitions. Word has length 19 [2020-10-14 23:58:05,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:05,342 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 120 transitions. [2020-10-14 23:58:05,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:58:05,342 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 120 transitions. [2020-10-14 23:58:05,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 23:58:05,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:05,343 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:05,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 23:58:05,343 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:05,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:05,344 INFO L82 PathProgramCache]: Analyzing trace with hash -583645387, now seen corresponding path program 5 times [2020-10-14 23:58:05,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:05,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549321008] [2020-10-14 23:58:05,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:05,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:05,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:05,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:05,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:05,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:58:05,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:05,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-14 23:58:05,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:05,569 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:05,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:58:05,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:05,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 23:58:05,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:05,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:05,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:05,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:05,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:05,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:05,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:05,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:05,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:05,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:05,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:05,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:05,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:05,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:58:05,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549321008] [2020-10-14 23:58:05,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:05,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:58:05,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9153721] [2020-10-14 23:58:05,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:58:05,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:05,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:58:05,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:58:05,676 INFO L87 Difference]: Start difference. First operand 87 states and 120 transitions. Second operand 8 states. [2020-10-14 23:58:05,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:05,821 INFO L93 Difference]: Finished difference Result 124 states and 179 transitions. [2020-10-14 23:58:05,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:58:05,822 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-14 23:58:05,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:05,823 INFO L225 Difference]: With dead ends: 124 [2020-10-14 23:58:05,823 INFO L226 Difference]: Without dead ends: 108 [2020-10-14 23:58:05,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:58:05,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-14 23:58:05,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 86. [2020-10-14 23:58:05,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-14 23:58:05,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 118 transitions. [2020-10-14 23:58:05,837 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 118 transitions. Word has length 19 [2020-10-14 23:58:05,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:05,837 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 118 transitions. [2020-10-14 23:58:05,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:58:05,838 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 118 transitions. [2020-10-14 23:58:05,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 23:58:05,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:05,840 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:05,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 23:58:05,841 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:05,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:05,842 INFO L82 PathProgramCache]: Analyzing trace with hash -984263929, now seen corresponding path program 3 times [2020-10-14 23:58:05,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:05,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180440906] [2020-10-14 23:58:05,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:05,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:05,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:05,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:06,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:06,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 23:58:06,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:58:06,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-14 23:58:06,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:06,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:06,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 23:58:06,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:06,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:58:06,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:06,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:06,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:06,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:06,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:06,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:06,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:06,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:06,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:06,113 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:06,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:06,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:06,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:06,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:06,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180440906] [2020-10-14 23:58:06,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:06,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 23:58:06,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445268139] [2020-10-14 23:58:06,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 23:58:06,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:06,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 23:58:06,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:58:06,124 INFO L87 Difference]: Start difference. First operand 86 states and 118 transitions. Second operand 8 states. [2020-10-14 23:58:06,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:06,253 INFO L93 Difference]: Finished difference Result 114 states and 158 transitions. [2020-10-14 23:58:06,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 23:58:06,255 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-14 23:58:06,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:06,256 INFO L225 Difference]: With dead ends: 114 [2020-10-14 23:58:06,256 INFO L226 Difference]: Without dead ends: 104 [2020-10-14 23:58:06,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:58:06,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-14 23:58:06,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2020-10-14 23:58:06,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-14 23:58:06,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 136 transitions. [2020-10-14 23:58:06,268 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 136 transitions. Word has length 19 [2020-10-14 23:58:06,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:06,268 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 136 transitions. [2020-10-14 23:58:06,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 23:58:06,269 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 136 transitions. [2020-10-14 23:58:06,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:58:06,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:06,270 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:06,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 23:58:06,270 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:06,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:06,271 INFO L82 PathProgramCache]: Analyzing trace with hash -187192262, now seen corresponding path program 2 times [2020-10-14 23:58:06,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:06,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329023625] [2020-10-14 23:58:06,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:06,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:06,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:06,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:06,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:06,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:58:06,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:58:06,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-14 23:58:06,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:06,403 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:06,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 23:58:06,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:06,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 23:58:06,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:06,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:06,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:06,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:06,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:06,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:06,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:06,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:06,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:06,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:06,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:06,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:06,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:06,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 23:58:06,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329023625] [2020-10-14 23:58:06,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:06,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 23:58:06,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605796918] [2020-10-14 23:58:06,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 23:58:06,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:06,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 23:58:06,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 23:58:06,481 INFO L87 Difference]: Start difference. First operand 98 states and 136 transitions. Second operand 6 states. [2020-10-14 23:58:06,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:06,548 INFO L93 Difference]: Finished difference Result 110 states and 148 transitions. [2020-10-14 23:58:06,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 23:58:06,549 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-14 23:58:06,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:06,550 INFO L225 Difference]: With dead ends: 110 [2020-10-14 23:58:06,550 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 23:58:06,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 23:58:06,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 23:58:06,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-14 23:58:06,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-14 23:58:06,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 119 transitions. [2020-10-14 23:58:06,558 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 119 transitions. Word has length 20 [2020-10-14 23:58:06,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:06,558 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 119 transitions. [2020-10-14 23:58:06,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 23:58:06,559 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 119 transitions. [2020-10-14 23:58:06,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:58:06,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:06,559 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:06,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 23:58:06,560 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:06,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:06,560 INFO L82 PathProgramCache]: Analyzing trace with hash -61628532, now seen corresponding path program 3 times [2020-10-14 23:58:06,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:06,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081148995] [2020-10-14 23:58:06,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:06,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:06,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:06,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:06,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:06,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:06,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:58:06,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:06,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 410 [2020-10-14 23:58:06,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:06,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:06,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:58:06,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:06,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:58:06,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:11,491 WARN L193 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-10-14 23:58:13,802 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-10-14 23:58:14,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:14,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:14,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:14,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:14,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:14,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:14,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:14,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:14,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:14,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:14,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:14,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:14,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081148995] [2020-10-14 23:58:14,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:14,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:58:14,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777229958] [2020-10-14 23:58:14,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:58:14,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:14,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:58:14,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:58:14,173 INFO L87 Difference]: Start difference. First operand 86 states and 119 transitions. Second operand 13 states. [2020-10-14 23:58:25,734 WARN L193 SmtUtils]: Spent 6.61 s on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-14 23:58:34,558 WARN L193 SmtUtils]: Spent 4.24 s on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2020-10-14 23:58:34,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:34,701 INFO L93 Difference]: Finished difference Result 96 states and 128 transitions. [2020-10-14 23:58:34,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 23:58:34,704 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2020-10-14 23:58:34,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:34,705 INFO L225 Difference]: With dead ends: 96 [2020-10-14 23:58:34,705 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 23:58:34,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=44, Invalid=227, Unknown=1, NotChecked=0, Total=272 [2020-10-14 23:58:34,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 23:58:34,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-14 23:58:34,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-14 23:58:34,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 118 transitions. [2020-10-14 23:58:34,714 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 118 transitions. Word has length 20 [2020-10-14 23:58:34,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:34,714 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 118 transitions. [2020-10-14 23:58:34,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:58:34,715 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 118 transitions. [2020-10-14 23:58:34,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:58:34,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:34,715 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:34,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 23:58:34,716 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:34,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:34,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1027409414, now seen corresponding path program 6 times [2020-10-14 23:58:34,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:34,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228262374] [2020-10-14 23:58:34,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:34,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:34,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:34,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:34,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:34,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:35,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:35,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:58:35,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:35,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 392 [2020-10-14 23:58:35,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:35,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:35,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:58:35,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:35,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 23:58:35,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:35,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:35,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:35,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:35,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:35,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:35,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:35,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:35,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:35,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:35,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:35,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:35,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:35,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228262374] [2020-10-14 23:58:35,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:35,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:58:35,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235862201] [2020-10-14 23:58:35,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:58:35,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:35,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:58:35,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:58:35,430 INFO L87 Difference]: Start difference. First operand 86 states and 118 transitions. Second operand 13 states. [2020-10-14 23:58:37,660 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-14 23:58:37,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:37,819 INFO L93 Difference]: Finished difference Result 98 states and 129 transitions. [2020-10-14 23:58:37,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:58:37,819 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2020-10-14 23:58:37,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:37,821 INFO L225 Difference]: With dead ends: 98 [2020-10-14 23:58:37,821 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 23:58:37,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-14 23:58:37,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 23:58:37,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2020-10-14 23:58:37,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-14 23:58:37,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 113 transitions. [2020-10-14 23:58:37,829 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 113 transitions. Word has length 20 [2020-10-14 23:58:37,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:37,830 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 113 transitions. [2020-10-14 23:58:37,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:58:37,830 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 113 transitions. [2020-10-14 23:58:37,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 23:58:37,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:37,831 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:37,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 23:58:37,831 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:37,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:37,831 INFO L82 PathProgramCache]: Analyzing trace with hash 990955450, now seen corresponding path program 7 times [2020-10-14 23:58:37,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:37,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685733776] [2020-10-14 23:58:37,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:37,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:37,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:37,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:38,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:38,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 23:58:38,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:38,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 287 [2020-10-14 23:58:38,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:38,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:38,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 23:58:38,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:38,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:58:38,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:38,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:38,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:38,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:38,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:38,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:38,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:38,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:38,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:38,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:38,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:38,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:38,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:38,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685733776] [2020-10-14 23:58:38,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:38,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 23:58:38,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3153112] [2020-10-14 23:58:38,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 23:58:38,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:38,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 23:58:38,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:58:38,233 INFO L87 Difference]: Start difference. First operand 82 states and 113 transitions. Second operand 9 states. [2020-10-14 23:58:38,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:38,371 INFO L93 Difference]: Finished difference Result 140 states and 213 transitions. [2020-10-14 23:58:38,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 23:58:38,374 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-10-14 23:58:38,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:38,375 INFO L225 Difference]: With dead ends: 140 [2020-10-14 23:58:38,375 INFO L226 Difference]: Without dead ends: 125 [2020-10-14 23:58:38,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-14 23:58:38,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-14 23:58:38,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 99. [2020-10-14 23:58:38,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-14 23:58:38,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 136 transitions. [2020-10-14 23:58:38,389 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 136 transitions. Word has length 20 [2020-10-14 23:58:38,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:38,390 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 136 transitions. [2020-10-14 23:58:38,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 23:58:38,390 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 136 transitions. [2020-10-14 23:58:38,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:58:38,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:38,392 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:38,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 23:58:38,392 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:38,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:38,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1736026155, now seen corresponding path program 8 times [2020-10-14 23:58:38,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:38,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555544485] [2020-10-14 23:58:38,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:38,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:38,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:38,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:38,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:38,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:58:38,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 23:58:38,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 409 [2020-10-14 23:58:38,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:38,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:38,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:58:38,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:38,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 23:58:38,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:38,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:38,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:38,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:38,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:38,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:38,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:38,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:38,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:38,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:38,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:38,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:38,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:38,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 23:58:38,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555544485] [2020-10-14 23:58:38,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:38,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:58:38,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297912410] [2020-10-14 23:58:38,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:58:38,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:38,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:58:38,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:58:38,949 INFO L87 Difference]: Start difference. First operand 99 states and 136 transitions. Second operand 10 states. [2020-10-14 23:58:39,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:39,138 INFO L93 Difference]: Finished difference Result 144 states and 211 transitions. [2020-10-14 23:58:39,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:58:39,139 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-14 23:58:39,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:39,140 INFO L225 Difference]: With dead ends: 144 [2020-10-14 23:58:39,141 INFO L226 Difference]: Without dead ends: 128 [2020-10-14 23:58:39,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 23:58:39,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-14 23:58:39,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2020-10-14 23:58:39,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-14 23:58:39,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 134 transitions. [2020-10-14 23:58:39,152 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 134 transitions. Word has length 21 [2020-10-14 23:58:39,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:39,154 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 134 transitions. [2020-10-14 23:58:39,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:58:39,154 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 134 transitions. [2020-10-14 23:58:39,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 23:58:39,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:39,155 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:39,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 23:58:39,156 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:39,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:39,156 INFO L82 PathProgramCache]: Analyzing trace with hash -2136644697, now seen corresponding path program 4 times [2020-10-14 23:58:39,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:39,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092188026] [2020-10-14 23:58:39,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:39,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:39,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:39,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:39,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 23:58:39,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 23:58:39,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 320 [2020-10-14 23:58:39,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:39,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:39,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 23:58:39,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:39,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 23:58:39,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:39,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:39,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:39,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:39,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:39,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:39,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:39,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:39,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:39,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:39,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:39,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:39,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:39,655 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:58:39,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092188026] [2020-10-14 23:58:39,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:39,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 23:58:39,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140199694] [2020-10-14 23:58:39,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 23:58:39,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:39,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 23:58:39,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:58:39,658 INFO L87 Difference]: Start difference. First operand 98 states and 134 transitions. Second operand 10 states. [2020-10-14 23:58:39,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:39,821 INFO L93 Difference]: Finished difference Result 126 states and 174 transitions. [2020-10-14 23:58:39,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 23:58:39,823 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-14 23:58:39,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:39,824 INFO L225 Difference]: With dead ends: 126 [2020-10-14 23:58:39,824 INFO L226 Difference]: Without dead ends: 116 [2020-10-14 23:58:39,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-14 23:58:39,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-14 23:58:39,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2020-10-14 23:58:39,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-14 23:58:39,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 152 transitions. [2020-10-14 23:58:39,837 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 152 transitions. Word has length 21 [2020-10-14 23:58:39,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:39,837 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 152 transitions. [2020-10-14 23:58:39,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 23:58:39,838 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 152 transitions. [2020-10-14 23:58:39,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:58:39,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:39,838 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:39,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 23:58:39,839 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:39,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:39,839 INFO L82 PathProgramCache]: Analyzing trace with hash -611178388, now seen corresponding path program 4 times [2020-10-14 23:58:39,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:39,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392237919] [2020-10-14 23:58:39,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:39,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:39,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:40,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:40,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:40,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:40,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:58:40,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:40,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 768 [2020-10-14 23:58:40,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:40,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:40,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 23:58:40,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:40,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:58:40,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:41,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:41,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:41,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:41,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:41,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:41,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:58:41,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:41,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:41,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:41,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:41,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:41,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 23:58:41,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392237919] [2020-10-14 23:58:41,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:41,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 23:58:41,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919837819] [2020-10-14 23:58:41,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 23:58:41,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:41,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 23:58:41,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-14 23:58:41,038 INFO L87 Difference]: Start difference. First operand 110 states and 152 transitions. Second operand 13 states. [2020-10-14 23:58:47,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:47,970 INFO L93 Difference]: Finished difference Result 136 states and 181 transitions. [2020-10-14 23:58:47,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 23:58:47,970 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-14 23:58:47,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:47,971 INFO L225 Difference]: With dead ends: 136 [2020-10-14 23:58:47,972 INFO L226 Difference]: Without dead ends: 124 [2020-10-14 23:58:47,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=78, Invalid=426, Unknown=2, NotChecked=0, Total=506 [2020-10-14 23:58:47,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-14 23:58:47,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2020-10-14 23:58:47,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-14 23:58:47,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 162 transitions. [2020-10-14 23:58:47,983 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 162 transitions. Word has length 22 [2020-10-14 23:58:47,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:47,983 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 162 transitions. [2020-10-14 23:58:47,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 23:58:47,983 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 162 transitions. [2020-10-14 23:58:47,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:58:47,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:47,984 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:47,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 23:58:47,985 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:47,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:47,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1112398132, now seen corresponding path program 5 times [2020-10-14 23:58:47,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:47,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672473132] [2020-10-14 23:58:47,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:47,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:48,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:48,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:48,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:48,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:48,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:58:48,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:48,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 893 [2020-10-14 23:58:48,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:48,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:48,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 23:58:48,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-14 23:58:48,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 23:58:48,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:49,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:58:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:49,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:49,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:49,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:58:49,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:58:49,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 23:58:49,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:49,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:49,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:58:49,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:58:49,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:58:49,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:58:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 23:58:49,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672473132] [2020-10-14 23:58:49,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:58:49,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 23:58:49,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192292485] [2020-10-14 23:58:49,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 23:58:49,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:58:49,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 23:58:49,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:58:49,011 INFO L87 Difference]: Start difference. First operand 119 states and 162 transitions. Second operand 7 states. [2020-10-14 23:58:49,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:58:49,148 INFO L93 Difference]: Finished difference Result 152 states and 209 transitions. [2020-10-14 23:58:49,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 23:58:49,149 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-14 23:58:49,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:58:49,151 INFO L225 Difference]: With dead ends: 152 [2020-10-14 23:58:49,151 INFO L226 Difference]: Without dead ends: 146 [2020-10-14 23:58:49,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-14 23:58:49,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-14 23:58:49,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2020-10-14 23:58:49,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-14 23:58:49,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 187 transitions. [2020-10-14 23:58:49,172 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 187 transitions. Word has length 22 [2020-10-14 23:58:49,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:58:49,173 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 187 transitions. [2020-10-14 23:58:49,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 23:58:49,173 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 187 transitions. [2020-10-14 23:58:49,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 23:58:49,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:58:49,174 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:58:49,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 23:58:49,174 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:58:49,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:58:49,174 INFO L82 PathProgramCache]: Analyzing trace with hash 25976860, now seen corresponding path program 6 times [2020-10-14 23:58:49,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:58:49,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558263453] [2020-10-14 23:58:49,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:58:49,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:58:49,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:49,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:49,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:49,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:58:49,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:58:49,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 23:58:49,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 23:58:49,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 681 [2020-10-14 23:58:49,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:58:49,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:58:49,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 23:58:49,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 23:58:49,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 23:58:49,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:58:56,327 WARN L193 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-14 23:59:04,738 WARN L193 SmtUtils]: Spent 8.35 s on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-10-14 23:59:11,054 WARN L193 SmtUtils]: Spent 6.24 s on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-10-14 23:59:29,746 WARN L193 SmtUtils]: Spent 14.52 s on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-10-14 23:59:38,470 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2020-10-14 23:59:49,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:59:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:59:49,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:59:49,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:59:49,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 23:59:49,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:59:49,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 23:59:49,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:59:49,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:59:49,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:59:49,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:59:49,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:59:49,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 23:59:49,124 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:59:49,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558263453] [2020-10-14 23:59:49,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 23:59:49,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 23:59:49,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853402849] [2020-10-14 23:59:49,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 23:59:49,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:59:49,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 23:59:49,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=167, Unknown=11, NotChecked=0, Total=210 [2020-10-14 23:59:49,126 INFO L87 Difference]: Start difference. First operand 136 states and 187 transitions. Second operand 15 states. [2020-10-15 00:00:05,972 WARN L193 SmtUtils]: Spent 6.19 s on a formula simplification that was a NOOP. DAG size: 46 [2020-10-15 00:00:17,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:17,205 INFO L93 Difference]: Finished difference Result 147 states and 197 transitions. [2020-10-15 00:00:17,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 00:00:17,206 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2020-10-15 00:00:17,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:17,207 INFO L225 Difference]: With dead ends: 147 [2020-10-15 00:00:17,207 INFO L226 Difference]: Without dead ends: 136 [2020-10-15 00:00:17,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 71.6s TimeCoverageRelationStatistics Valid=40, Invalid=219, Unknown=13, NotChecked=0, Total=272 [2020-10-15 00:00:17,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-15 00:00:17,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-10-15 00:00:17,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-15 00:00:17,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 186 transitions. [2020-10-15 00:00:17,224 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 186 transitions. Word has length 22 [2020-10-15 00:00:17,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:17,225 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 186 transitions. [2020-10-15 00:00:17,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 00:00:17,225 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 186 transitions. [2020-10-15 00:00:17,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-15 00:00:17,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:17,226 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:17,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-15 00:00:17,226 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:17,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:17,227 INFO L82 PathProgramCache]: Analyzing trace with hash -373109990, now seen corresponding path program 9 times [2020-10-15 00:00:17,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:17,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918993458] [2020-10-15 00:00:17,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:17,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:17,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:17,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:17,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:17,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:17,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-15 00:00:17,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:00:17,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-15 00:00:17,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:17,545 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:17,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:00:17,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:17,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-15 00:00:17,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:17,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:17,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:17,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:17,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:17,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:17,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:17,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:17,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:17,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:17,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:17,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:17,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:17,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918993458] [2020-10-15 00:00:17,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:17,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-15 00:00:17,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128169373] [2020-10-15 00:00:17,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 00:00:17,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:17,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 00:00:17,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:00:17,720 INFO L87 Difference]: Start difference. First operand 136 states and 186 transitions. Second operand 11 states. [2020-10-15 00:00:18,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:18,024 INFO L93 Difference]: Finished difference Result 216 states and 328 transitions. [2020-10-15 00:00:18,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 00:00:18,025 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-15 00:00:18,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:18,027 INFO L225 Difference]: With dead ends: 216 [2020-10-15 00:00:18,027 INFO L226 Difference]: Without dead ends: 199 [2020-10-15 00:00:18,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:00:18,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-15 00:00:18,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 151. [2020-10-15 00:00:18,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-15 00:00:18,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 208 transitions. [2020-10-15 00:00:18,045 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 208 transitions. Word has length 22 [2020-10-15 00:00:18,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:18,046 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 208 transitions. [2020-10-15 00:00:18,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 00:00:18,046 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 208 transitions. [2020-10-15 00:00:18,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 00:00:18,047 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:18,047 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:18,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-15 00:00:18,048 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:18,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:18,048 INFO L82 PathProgramCache]: Analyzing trace with hash -590285690, now seen corresponding path program 7 times [2020-10-15 00:00:18,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:18,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680657372] [2020-10-15 00:00:18,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:18,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:18,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:18,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:20,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:20,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-15 00:00:20,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:00:20,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2030 [2020-10-15 00:00:20,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:20,089 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:20,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 00:00:20,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-15 00:00:20,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-15 00:00:20,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:20,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:20,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:20,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:20,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:20,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:20,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:20,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:20,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:20,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:20,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:20,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:20,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 00:00:20,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680657372] [2020-10-15 00:00:20,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:20,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 00:00:20,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269689446] [2020-10-15 00:00:20,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 00:00:20,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:20,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 00:00:20,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:00:20,255 INFO L87 Difference]: Start difference. First operand 151 states and 208 transitions. Second operand 8 states. [2020-10-15 00:00:20,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:20,458 INFO L93 Difference]: Finished difference Result 187 states and 260 transitions. [2020-10-15 00:00:20,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-15 00:00:20,459 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-10-15 00:00:20,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:20,461 INFO L225 Difference]: With dead ends: 187 [2020-10-15 00:00:20,461 INFO L226 Difference]: Without dead ends: 181 [2020-10-15 00:00:20,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:00:20,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-15 00:00:20,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 170. [2020-10-15 00:00:20,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-15 00:00:20,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 236 transitions. [2020-10-15 00:00:20,480 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 236 transitions. Word has length 23 [2020-10-15 00:00:20,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:20,480 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 236 transitions. [2020-10-15 00:00:20,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:00:20,481 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 236 transitions. [2020-10-15 00:00:20,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 00:00:20,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:20,482 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:20,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-15 00:00:20,482 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:20,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:20,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1072381835, now seen corresponding path program 10 times [2020-10-15 00:00:20,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:20,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966493681] [2020-10-15 00:00:20,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:20,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:20,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:20,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:20,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:20,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-15 00:00:20,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:00:20,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435 [2020-10-15 00:00:20,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:20,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:20,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-15 00:00:20,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:20,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-15 00:00:20,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:21,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:21,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:21,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:21,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:21,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:21,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:21,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:21,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:21,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:21,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:21,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:21,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:21,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966493681] [2020-10-15 00:00:21,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:21,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 00:00:21,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495986058] [2020-10-15 00:00:21,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-15 00:00:21,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:21,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-15 00:00:21,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:00:21,147 INFO L87 Difference]: Start difference. First operand 170 states and 236 transitions. Second operand 12 states. [2020-10-15 00:00:21,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:21,478 INFO L93 Difference]: Finished difference Result 269 states and 414 transitions. [2020-10-15 00:00:21,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 00:00:21,479 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-10-15 00:00:21,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:21,480 INFO L225 Difference]: With dead ends: 269 [2020-10-15 00:00:21,481 INFO L226 Difference]: Without dead ends: 250 [2020-10-15 00:00:21,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-15 00:00:21,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-15 00:00:21,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 186. [2020-10-15 00:00:21,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-15 00:00:21,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 260 transitions. [2020-10-15 00:00:21,499 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 260 transitions. Word has length 23 [2020-10-15 00:00:21,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:21,499 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 260 transitions. [2020-10-15 00:00:21,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-15 00:00:21,500 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 260 transitions. [2020-10-15 00:00:21,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 00:00:21,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:21,501 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:21,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-15 00:00:21,501 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:21,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:21,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1569460748, now seen corresponding path program 8 times [2020-10-15 00:00:21,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:21,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133263201] [2020-10-15 00:00:21,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:21,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:21,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:22,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:22,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-15 00:00:22,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:22,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 553 [2020-10-15 00:00:22,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:22,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:22,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 00:00:22,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:00:22,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-15 00:00:22,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:22,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:22,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:22,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:22,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:22,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:22,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:22,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:22,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:22,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:22,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:22,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:22,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:22,292 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-15 00:00:22,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133263201] [2020-10-15 00:00:22,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:22,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-15 00:00:22,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552813923] [2020-10-15 00:00:22,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 00:00:22,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:22,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 00:00:22,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-15 00:00:22,294 INFO L87 Difference]: Start difference. First operand 186 states and 260 transitions. Second operand 8 states. [2020-10-15 00:00:22,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:22,631 INFO L93 Difference]: Finished difference Result 298 states and 388 transitions. [2020-10-15 00:00:22,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 00:00:22,632 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-15 00:00:22,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:22,634 INFO L225 Difference]: With dead ends: 298 [2020-10-15 00:00:22,634 INFO L226 Difference]: Without dead ends: 263 [2020-10-15 00:00:22,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:00:22,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-15 00:00:22,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 172. [2020-10-15 00:00:22,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-15 00:00:22,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 233 transitions. [2020-10-15 00:00:22,650 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 233 transitions. Word has length 24 [2020-10-15 00:00:22,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:22,650 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 233 transitions. [2020-10-15 00:00:22,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 00:00:22,650 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 233 transitions. [2020-10-15 00:00:22,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 00:00:22,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:22,651 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:22,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-15 00:00:22,651 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:22,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:22,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1859614010, now seen corresponding path program 9 times [2020-10-15 00:00:22,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:22,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945009495] [2020-10-15 00:00:22,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:22,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:22,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:22,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:23,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:23,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:23,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:23,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-15 00:00:23,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:00:23,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1005 [2020-10-15 00:00:23,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:23,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:23,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:00:23,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:23,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-15 00:00:23,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:24,150 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-10-15 00:00:24,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:24,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:24,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:24,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:24,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:24,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-15 00:00:24,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:24,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:24,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:24,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:24,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:24,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:24,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945009495] [2020-10-15 00:00:24,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:24,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-15 00:00:24,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958228602] [2020-10-15 00:00:24,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 00:00:24,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:24,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 00:00:24,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:00:24,362 INFO L87 Difference]: Start difference. First operand 172 states and 233 transitions. Second operand 17 states. [2020-10-15 00:00:26,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:26,802 INFO L93 Difference]: Finished difference Result 185 states and 245 transitions. [2020-10-15 00:00:26,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:00:26,802 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2020-10-15 00:00:26,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:26,804 INFO L225 Difference]: With dead ends: 185 [2020-10-15 00:00:26,804 INFO L226 Difference]: Without dead ends: 173 [2020-10-15 00:00:26,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:00:26,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-15 00:00:26,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2020-10-15 00:00:26,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-15 00:00:26,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 232 transitions. [2020-10-15 00:00:26,818 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 232 transitions. Word has length 24 [2020-10-15 00:00:26,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:26,819 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 232 transitions. [2020-10-15 00:00:26,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 00:00:26,819 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 232 transitions. [2020-10-15 00:00:26,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 00:00:26,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:26,820 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:26,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-15 00:00:26,820 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:26,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:26,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1176237132, now seen corresponding path program 10 times [2020-10-15 00:00:26,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:26,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847098753] [2020-10-15 00:00:26,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:26,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:26,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:27,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:27,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:27,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:27,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-15 00:00:27,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:00:27,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 947 [2020-10-15 00:00:27,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:27,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:27,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:00:27,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:27,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-15 00:00:27,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:28,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:28,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:28,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:28,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:28,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:28,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:28,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:28,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:28,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:28,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:28,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:28,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:28,505 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:28,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847098753] [2020-10-15 00:00:28,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:28,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-15 00:00:28,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430914112] [2020-10-15 00:00:28,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 00:00:28,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:28,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 00:00:28,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:00:28,507 INFO L87 Difference]: Start difference. First operand 172 states and 232 transitions. Second operand 17 states. [2020-10-15 00:00:33,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:33,272 INFO L93 Difference]: Finished difference Result 184 states and 243 transitions. [2020-10-15 00:00:33,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 00:00:33,272 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2020-10-15 00:00:33,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:33,274 INFO L225 Difference]: With dead ends: 184 [2020-10-15 00:00:33,274 INFO L226 Difference]: Without dead ends: 172 [2020-10-15 00:00:33,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-10-15 00:00:33,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-15 00:00:33,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-10-15 00:00:33,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-15 00:00:33,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 231 transitions. [2020-10-15 00:00:33,288 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 231 transitions. Word has length 24 [2020-10-15 00:00:33,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:33,288 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 231 transitions. [2020-10-15 00:00:33,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 00:00:33,288 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 231 transitions. [2020-10-15 00:00:33,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 00:00:33,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:33,289 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:33,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-15 00:00:33,290 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:33,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:33,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1616753926, now seen corresponding path program 11 times [2020-10-15 00:00:33,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:33,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815033723] [2020-10-15 00:00:33,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:33,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:33,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:33,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:33,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:34,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:34,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-15 00:00:34,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:00:34,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 724 [2020-10-15 00:00:34,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:34,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:34,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:00:34,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:34,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-15 00:00:34,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:34,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:34,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:34,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:34,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:34,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:34,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:34,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:34,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:34,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:34,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:34,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:34,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-15 00:00:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:34,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815033723] [2020-10-15 00:00:34,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:34,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-15 00:00:34,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330338909] [2020-10-15 00:00:34,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 00:00:34,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:34,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 00:00:34,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:00:34,838 INFO L87 Difference]: Start difference. First operand 172 states and 231 transitions. Second operand 17 states. [2020-10-15 00:00:43,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:43,724 INFO L93 Difference]: Finished difference Result 190 states and 248 transitions. [2020-10-15 00:00:43,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 00:00:43,725 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2020-10-15 00:00:43,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:43,726 INFO L225 Difference]: With dead ends: 190 [2020-10-15 00:00:43,726 INFO L226 Difference]: Without dead ends: 178 [2020-10-15 00:00:43,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-10-15 00:00:43,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-15 00:00:43,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 172. [2020-10-15 00:00:43,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-15 00:00:43,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 230 transitions. [2020-10-15 00:00:43,743 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 230 transitions. Word has length 24 [2020-10-15 00:00:43,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:43,743 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 230 transitions. [2020-10-15 00:00:43,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 00:00:43,743 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 230 transitions. [2020-10-15 00:00:43,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 00:00:43,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:43,744 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:43,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-15 00:00:43,744 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:43,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:43,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1274972550, now seen corresponding path program 12 times [2020-10-15 00:00:43,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:43,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260392187] [2020-10-15 00:00:43,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:43,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:43,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:43,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:44,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:44,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-15 00:00:44,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:00:44,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 531 [2020-10-15 00:00:44,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:44,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:44,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:00:44,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:44,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-15 00:00:44,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:44,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:44,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:44,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:44,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:44,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:44,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:44,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:44,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:44,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:44,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:44,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:44,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:44,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:44,459 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:00:44,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260392187] [2020-10-15 00:00:44,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:44,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 00:00:44,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322410821] [2020-10-15 00:00:44,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 00:00:44,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:44,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 00:00:44,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:00:44,461 INFO L87 Difference]: Start difference. First operand 172 states and 230 transitions. Second operand 13 states. [2020-10-15 00:00:44,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:44,809 INFO L93 Difference]: Finished difference Result 265 states and 382 transitions. [2020-10-15 00:00:44,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 00:00:44,809 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-10-15 00:00:44,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:44,811 INFO L225 Difference]: With dead ends: 265 [2020-10-15 00:00:44,811 INFO L226 Difference]: Without dead ends: 245 [2020-10-15 00:00:44,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:00:44,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-15 00:00:44,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 183. [2020-10-15 00:00:44,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-15 00:00:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 246 transitions. [2020-10-15 00:00:44,832 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 246 transitions. Word has length 24 [2020-10-15 00:00:44,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:44,833 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 246 transitions. [2020-10-15 00:00:44,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 00:00:44,833 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 246 transitions. [2020-10-15 00:00:44,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 00:00:44,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:44,834 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:44,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-15 00:00:44,834 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:44,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:44,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1675591092, now seen corresponding path program 5 times [2020-10-15 00:00:44,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:44,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090655982] [2020-10-15 00:00:44,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:44,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:44,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:45,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:45,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-15 00:00:45,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:45,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-15 00:00:45,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:45,185 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:45,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-15 00:00:45,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:45,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-15 00:00:45,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:45,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:45,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:45,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:45,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:45,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:45,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:45,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:45,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:45,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:45,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:45,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:45,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:45,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:45,370 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:45,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090655982] [2020-10-15 00:00:45,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:45,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-15 00:00:45,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735703385] [2020-10-15 00:00:45,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 00:00:45,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:45,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 00:00:45,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:00:45,371 INFO L87 Difference]: Start difference. First operand 183 states and 246 transitions. Second operand 13 states. [2020-10-15 00:00:45,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:45,682 INFO L93 Difference]: Finished difference Result 213 states and 285 transitions. [2020-10-15 00:00:45,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 00:00:45,683 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-10-15 00:00:45,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:45,685 INFO L225 Difference]: With dead ends: 213 [2020-10-15 00:00:45,685 INFO L226 Difference]: Without dead ends: 207 [2020-10-15 00:00:45,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-15 00:00:45,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-15 00:00:45,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 187. [2020-10-15 00:00:45,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-15 00:00:45,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 252 transitions. [2020-10-15 00:00:45,707 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 252 transitions. Word has length 24 [2020-10-15 00:00:45,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:45,707 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 252 transitions. [2020-10-15 00:00:45,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-15 00:00:45,707 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 252 transitions. [2020-10-15 00:00:45,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 00:00:45,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:45,708 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:45,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-15 00:00:45,709 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:45,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:45,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1034649877, now seen corresponding path program 13 times [2020-10-15 00:00:45,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:45,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038145575] [2020-10-15 00:00:45,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:45,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:45,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:45,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:46,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:46,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-15 00:00:46,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:00:46,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 555 [2020-10-15 00:00:46,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:46,280 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:46,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 00:00:46,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:46,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-15 00:00:46,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:46,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:46,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:46,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:46,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:46,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:46,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:00:46,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:46,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:46,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:46,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:46,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:46,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:00:46,524 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:00:46,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038145575] [2020-10-15 00:00:46,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:46,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 00:00:46,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105925201] [2020-10-15 00:00:46,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 00:00:46,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:46,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 00:00:46,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:00:46,529 INFO L87 Difference]: Start difference. First operand 187 states and 252 transitions. Second operand 14 states. [2020-10-15 00:00:46,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:46,947 INFO L93 Difference]: Finished difference Result 286 states and 416 transitions. [2020-10-15 00:00:46,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 00:00:46,948 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2020-10-15 00:00:46,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:46,950 INFO L225 Difference]: With dead ends: 286 [2020-10-15 00:00:46,950 INFO L226 Difference]: Without dead ends: 266 [2020-10-15 00:00:46,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:00:46,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-15 00:00:46,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 198. [2020-10-15 00:00:46,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-15 00:00:46,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 268 transitions. [2020-10-15 00:00:46,968 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 268 transitions. Word has length 25 [2020-10-15 00:00:46,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:46,968 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 268 transitions. [2020-10-15 00:00:46,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 00:00:46,968 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 268 transitions. [2020-10-15 00:00:46,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-15 00:00:46,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:46,969 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:46,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-15 00:00:46,969 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:46,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:46,970 INFO L82 PathProgramCache]: Analyzing trace with hash 634031335, now seen corresponding path program 6 times [2020-10-15 00:00:46,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:46,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348629481] [2020-10-15 00:00:46,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:46,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:47,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:47,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:47,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-15 00:00:47,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:00:47,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 484 [2020-10-15 00:00:47,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:47,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:47,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-15 00:00:47,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:47,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-15 00:00:47,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:47,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:47,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:47,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:47,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:47,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:47,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:47,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:47,653 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:47,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:47,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:47,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:47,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:00:47,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348629481] [2020-10-15 00:00:47,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:47,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-15 00:00:47,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584834577] [2020-10-15 00:00:47,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-15 00:00:47,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:47,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-15 00:00:47,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:00:47,657 INFO L87 Difference]: Start difference. First operand 198 states and 268 transitions. Second operand 14 states. [2020-10-15 00:00:47,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:47,975 INFO L93 Difference]: Finished difference Result 228 states and 307 transitions. [2020-10-15 00:00:47,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 00:00:47,981 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2020-10-15 00:00:47,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:47,982 INFO L225 Difference]: With dead ends: 228 [2020-10-15 00:00:47,983 INFO L226 Difference]: Without dead ends: 222 [2020-10-15 00:00:47,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-15 00:00:47,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-15 00:00:48,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 202. [2020-10-15 00:00:48,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-15 00:00:48,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 274 transitions. [2020-10-15 00:00:48,008 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 274 transitions. Word has length 25 [2020-10-15 00:00:48,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:48,008 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 274 transitions. [2020-10-15 00:00:48,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-15 00:00:48,008 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 274 transitions. [2020-10-15 00:00:48,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 00:00:48,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:48,009 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:48,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-15 00:00:48,009 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:48,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:48,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1657076444, now seen corresponding path program 11 times [2020-10-15 00:00:48,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:48,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730418859] [2020-10-15 00:00:48,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:48,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:48,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:48,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:48,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:48,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:48,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:48,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-15 00:00:48,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:00:48,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 494 [2020-10-15 00:00:48,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:48,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:48,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-15 00:00:48,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:00:48,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 00:00:48,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:55,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:55,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:55,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:55,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:55,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:55,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:55,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:55,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:55,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:55,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:55,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:55,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:55,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:55,206 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-15 00:00:55,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730418859] [2020-10-15 00:00:55,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:55,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:00:55,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387757709] [2020-10-15 00:00:55,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:00:55,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:55,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:00:55,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=195, Unknown=3, NotChecked=0, Total=240 [2020-10-15 00:00:55,208 INFO L87 Difference]: Start difference. First operand 202 states and 274 transitions. Second operand 16 states. [2020-10-15 00:00:57,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:00:57,661 INFO L93 Difference]: Finished difference Result 242 states and 318 transitions. [2020-10-15 00:00:57,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 00:00:57,662 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2020-10-15 00:00:57,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:00:57,664 INFO L225 Difference]: With dead ends: 242 [2020-10-15 00:00:57,665 INFO L226 Difference]: Without dead ends: 229 [2020-10-15 00:00:57,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=51, Invalid=252, Unknown=3, NotChecked=0, Total=306 [2020-10-15 00:00:57,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-15 00:00:57,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 214. [2020-10-15 00:00:57,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-15 00:00:57,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 288 transitions. [2020-10-15 00:00:57,683 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 288 transitions. Word has length 26 [2020-10-15 00:00:57,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:00:57,683 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 288 transitions. [2020-10-15 00:00:57,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:00:57,683 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 288 transitions. [2020-10-15 00:00:57,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 00:00:57,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:00:57,684 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:00:57,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-15 00:00:57,684 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:00:57,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:00:57,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1572259612, now seen corresponding path program 12 times [2020-10-15 00:00:57,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:00:57,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158254068] [2020-10-15 00:00:57,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:00:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:57,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:57,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:57,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:59,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:59,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-15 00:00:59,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:00:59,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2095 [2020-10-15 00:00:59,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:59,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:59,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 00:00:59,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 00:00:59,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-15 00:00:59,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:59,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:00:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:00:59,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:00:59,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:00:59,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:00:59,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:00:59,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:00:59,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:00:59,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:00:59,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:00:59,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:00:59,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:00:59,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:00:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-15 00:00:59,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158254068] [2020-10-15 00:00:59,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:00:59,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 00:00:59,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638087488] [2020-10-15 00:00:59,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 00:00:59,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:00:59,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 00:00:59,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:00:59,919 INFO L87 Difference]: Start difference. First operand 214 states and 288 transitions. Second operand 9 states. [2020-10-15 00:01:00,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:00,108 INFO L93 Difference]: Finished difference Result 259 states and 352 transitions. [2020-10-15 00:01:00,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 00:01:00,108 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-15 00:01:00,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:00,110 INFO L225 Difference]: With dead ends: 259 [2020-10-15 00:01:00,110 INFO L226 Difference]: Without dead ends: 253 [2020-10-15 00:01:00,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-15 00:01:00,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-15 00:01:00,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 239. [2020-10-15 00:01:00,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-15 00:01:00,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 323 transitions. [2020-10-15 00:01:00,143 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 323 transitions. Word has length 26 [2020-10-15 00:01:00,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:00,143 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 323 transitions. [2020-10-15 00:01:00,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 00:01:00,144 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 323 transitions. [2020-10-15 00:01:00,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 00:01:00,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:00,145 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:00,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-15 00:01:00,146 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:00,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:00,146 INFO L82 PathProgramCache]: Analyzing trace with hash -68791060, now seen corresponding path program 13 times [2020-10-15 00:01:00,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:00,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505971532] [2020-10-15 00:01:00,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:00,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:00,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:00,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:00,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:00,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:01,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:01,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-15 00:01:01,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:01:01,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 959 [2020-10-15 00:01:01,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:01,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:01,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-15 00:01:01,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:01,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 00:01:01,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:07,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:07,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:07,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:07,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:07,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:07,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:07,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:07,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:07,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:07,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:07,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:07,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:07,863 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:07,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505971532] [2020-10-15 00:01:07,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:07,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:01:07,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387366328] [2020-10-15 00:01:07,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:01:07,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:07,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:01:07,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=269, Unknown=3, NotChecked=0, Total=306 [2020-10-15 00:01:07,867 INFO L87 Difference]: Start difference. First operand 239 states and 323 transitions. Second operand 18 states. [2020-10-15 00:01:10,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:10,612 INFO L93 Difference]: Finished difference Result 280 states and 363 transitions. [2020-10-15 00:01:10,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 00:01:10,613 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-15 00:01:10,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:10,614 INFO L225 Difference]: With dead ends: 280 [2020-10-15 00:01:10,614 INFO L226 Difference]: Without dead ends: 244 [2020-10-15 00:01:10,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=59, Invalid=489, Unknown=4, NotChecked=0, Total=552 [2020-10-15 00:01:10,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-15 00:01:10,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 239. [2020-10-15 00:01:10,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-15 00:01:10,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 319 transitions. [2020-10-15 00:01:10,634 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 319 transitions. Word has length 26 [2020-10-15 00:01:10,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:10,634 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 319 transitions. [2020-10-15 00:01:10,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:01:10,634 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 319 transitions. [2020-10-15 00:01:10,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 00:01:10,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:10,635 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:10,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-15 00:01:10,636 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:10,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:10,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1261009116, now seen corresponding path program 14 times [2020-10-15 00:01:10,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:10,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378615688] [2020-10-15 00:01:10,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:10,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:10,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:10,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:10,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:10,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:11,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:11,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-15 00:01:11,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:01:11,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 818 [2020-10-15 00:01:11,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:11,464 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:11,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-15 00:01:11,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:11,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-15 00:01:11,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:14,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:14,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:14,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:14,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:14,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:14,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:14,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:14,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:14,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:14,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:14,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:14,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:14,122 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:14,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378615688] [2020-10-15 00:01:14,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:14,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-15 00:01:14,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571381201] [2020-10-15 00:01:14,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 00:01:14,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:14,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 00:01:14,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=305, Unknown=1, NotChecked=0, Total=342 [2020-10-15 00:01:14,124 INFO L87 Difference]: Start difference. First operand 239 states and 319 transitions. Second operand 19 states. [2020-10-15 00:01:17,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:17,060 INFO L93 Difference]: Finished difference Result 288 states and 368 transitions. [2020-10-15 00:01:17,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-15 00:01:17,061 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2020-10-15 00:01:17,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:17,063 INFO L225 Difference]: With dead ends: 288 [2020-10-15 00:01:17,063 INFO L226 Difference]: Without dead ends: 247 [2020-10-15 00:01:17,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=73, Invalid=682, Unknown=1, NotChecked=0, Total=756 [2020-10-15 00:01:17,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-15 00:01:17,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 239. [2020-10-15 00:01:17,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-15 00:01:17,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 315 transitions. [2020-10-15 00:01:17,083 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 315 transitions. Word has length 26 [2020-10-15 00:01:17,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:17,084 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 315 transitions. [2020-10-15 00:01:17,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 00:01:17,084 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 315 transitions. [2020-10-15 00:01:17,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 00:01:17,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:17,085 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:17,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-15 00:01:17,085 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:17,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:17,086 INFO L82 PathProgramCache]: Analyzing trace with hash -381498918, now seen corresponding path program 14 times [2020-10-15 00:01:17,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:17,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446228220] [2020-10-15 00:01:17,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:17,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:17,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:17,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:17,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:17,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-15 00:01:17,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:17,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 447 [2020-10-15 00:01:17,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:17,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:17,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:01:17,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:17,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-15 00:01:17,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:17,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:17,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:17,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:17,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:17,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:17,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:17,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:17,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:17,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:17,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:17,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:17,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:17,785 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 00:01:17,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446228220] [2020-10-15 00:01:17,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:17,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-15 00:01:17,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359140811] [2020-10-15 00:01:17,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 00:01:17,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:17,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 00:01:17,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:01:17,787 INFO L87 Difference]: Start difference. First operand 239 states and 315 transitions. Second operand 15 states. [2020-10-15 00:01:18,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:18,241 INFO L93 Difference]: Finished difference Result 360 states and 518 transitions. [2020-10-15 00:01:18,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 00:01:18,242 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-10-15 00:01:18,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:18,244 INFO L225 Difference]: With dead ends: 360 [2020-10-15 00:01:18,244 INFO L226 Difference]: Without dead ends: 338 [2020-10-15 00:01:18,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:01:18,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-10-15 00:01:18,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 252. [2020-10-15 00:01:18,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-15 00:01:18,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 334 transitions. [2020-10-15 00:01:18,266 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 334 transitions. Word has length 26 [2020-10-15 00:01:18,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:18,267 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 334 transitions. [2020-10-15 00:01:18,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 00:01:18,267 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 334 transitions. [2020-10-15 00:01:18,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-15 00:01:18,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:18,268 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:18,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-15 00:01:18,268 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:18,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:18,268 INFO L82 PathProgramCache]: Analyzing trace with hash -782117460, now seen corresponding path program 7 times [2020-10-15 00:01:18,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:18,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419071828] [2020-10-15 00:01:18,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:18,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:18,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:18,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:18,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-15 00:01:18,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:18,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 404 [2020-10-15 00:01:18,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:18,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:18,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-15 00:01:18,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:18,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-15 00:01:18,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:18,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:18,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:18,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:18,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:18,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:18,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:18,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:18,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:18,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:18,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:18,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:18,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:18,907 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:18,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419071828] [2020-10-15 00:01:18,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:18,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-15 00:01:18,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918005726] [2020-10-15 00:01:18,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-15 00:01:18,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:18,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-15 00:01:18,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:01:18,909 INFO L87 Difference]: Start difference. First operand 252 states and 334 transitions. Second operand 15 states. [2020-10-15 00:01:19,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:19,284 INFO L93 Difference]: Finished difference Result 285 states and 377 transitions. [2020-10-15 00:01:19,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 00:01:19,286 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-10-15 00:01:19,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:19,289 INFO L225 Difference]: With dead ends: 285 [2020-10-15 00:01:19,289 INFO L226 Difference]: Without dead ends: 279 [2020-10-15 00:01:19,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-15 00:01:19,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-15 00:01:19,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 256. [2020-10-15 00:01:19,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-15 00:01:19,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 340 transitions. [2020-10-15 00:01:19,312 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 340 transitions. Word has length 26 [2020-10-15 00:01:19,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:19,313 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 340 transitions. [2020-10-15 00:01:19,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-15 00:01:19,313 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 340 transitions. [2020-10-15 00:01:19,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 00:01:19,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:19,314 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:19,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-15 00:01:19,314 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:19,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:19,315 INFO L82 PathProgramCache]: Analyzing trace with hash -82317768, now seen corresponding path program 15 times [2020-10-15 00:01:19,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:19,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455446670] [2020-10-15 00:01:19,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:19,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:19,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:19,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:21,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:21,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-15 00:01:21,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:21,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2373 [2020-10-15 00:01:21,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:21,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:21,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 00:01:21,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 00:01:21,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-15 00:01:21,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:21,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:21,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:21,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:21,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:21,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:21,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:21,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:21,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:21,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:21,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:22,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:22,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:22,001 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-15 00:01:22,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455446670] [2020-10-15 00:01:22,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:22,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:01:22,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115682458] [2020-10-15 00:01:22,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:01:22,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:22,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:01:22,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:01:22,003 INFO L87 Difference]: Start difference. First operand 256 states and 340 transitions. Second operand 10 states. [2020-10-15 00:01:22,602 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2020-10-15 00:01:23,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:23,428 INFO L93 Difference]: Finished difference Result 420 states and 511 transitions. [2020-10-15 00:01:23,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 00:01:23,429 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-15 00:01:23,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:23,431 INFO L225 Difference]: With dead ends: 420 [2020-10-15 00:01:23,431 INFO L226 Difference]: Without dead ends: 370 [2020-10-15 00:01:23,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:01:23,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-10-15 00:01:23,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 229. [2020-10-15 00:01:23,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-15 00:01:23,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 302 transitions. [2020-10-15 00:01:23,459 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 302 transitions. Word has length 27 [2020-10-15 00:01:23,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:23,460 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 302 transitions. [2020-10-15 00:01:23,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:01:23,461 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 302 transitions. [2020-10-15 00:01:23,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 00:01:23,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:23,462 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:23,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-15 00:01:23,462 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:23,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:23,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1733057145, now seen corresponding path program 8 times [2020-10-15 00:01:23,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:23,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369821553] [2020-10-15 00:01:23,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:23,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:23,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:23,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:23,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-15 00:01:23,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:23,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-10-15 00:01:23,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:23,814 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:23,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-15 00:01:23,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:23,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-15 00:01:23,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:24,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:24,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:24,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:24,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:24,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:24,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-15 00:01:24,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:24,067 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:24,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:24,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:24,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:24,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:24,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369821553] [2020-10-15 00:01:24,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:24,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-15 00:01:24,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060919291] [2020-10-15 00:01:24,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-15 00:01:24,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:24,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-15 00:01:24,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:01:24,071 INFO L87 Difference]: Start difference. First operand 229 states and 302 transitions. Second operand 16 states. [2020-10-15 00:01:24,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:24,508 INFO L93 Difference]: Finished difference Result 374 states and 540 transitions. [2020-10-15 00:01:24,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 00:01:24,508 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-10-15 00:01:24,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:24,510 INFO L225 Difference]: With dead ends: 374 [2020-10-15 00:01:24,510 INFO L226 Difference]: Without dead ends: 353 [2020-10-15 00:01:24,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-15 00:01:24,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-10-15 00:01:24,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 246. [2020-10-15 00:01:24,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-15 00:01:24,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 327 transitions. [2020-10-15 00:01:24,539 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 327 transitions. Word has length 27 [2020-10-15 00:01:24,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:24,539 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 327 transitions. [2020-10-15 00:01:24,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-15 00:01:24,539 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 327 transitions. [2020-10-15 00:01:24,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 00:01:24,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:24,540 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:24,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-15 00:01:24,541 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:24,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:24,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1595762956, now seen corresponding path program 16 times [2020-10-15 00:01:24,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:24,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556851921] [2020-10-15 00:01:24,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:24,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:24,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:24,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:24,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:24,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:25,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:25,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-15 00:01:25,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:01:25,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 840 [2020-10-15 00:01:25,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:25,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:25,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-15 00:01:25,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:25,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-15 00:01:25,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:25,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:25,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:25,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:25,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:25,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:25,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:25,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:25,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:25,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:25,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:25,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:25,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:25,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:25,944 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:25,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556851921] [2020-10-15 00:01:25,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:25,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-15 00:01:25,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979225997] [2020-10-15 00:01:25,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-15 00:01:25,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:25,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-15 00:01:25,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-15 00:01:25,945 INFO L87 Difference]: Start difference. First operand 246 states and 327 transitions. Second operand 20 states. [2020-10-15 00:01:26,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:26,797 INFO L93 Difference]: Finished difference Result 277 states and 357 transitions. [2020-10-15 00:01:26,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-15 00:01:26,798 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-15 00:01:26,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:26,800 INFO L225 Difference]: With dead ends: 277 [2020-10-15 00:01:26,800 INFO L226 Difference]: Without dead ends: 263 [2020-10-15 00:01:26,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2020-10-15 00:01:26,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-15 00:01:26,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 246. [2020-10-15 00:01:26,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-15 00:01:26,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 326 transitions. [2020-10-15 00:01:26,826 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 326 transitions. Word has length 28 [2020-10-15 00:01:26,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:26,826 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 326 transitions. [2020-10-15 00:01:26,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-15 00:01:26,826 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 326 transitions. [2020-10-15 00:01:26,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-15 00:01:26,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:26,827 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:26,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-15 00:01:26,827 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:26,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:26,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1147416308, now seen corresponding path program 9 times [2020-10-15 00:01:26,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:26,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912433945] [2020-10-15 00:01:26,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:26,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:26,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:26,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:27,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:27,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-15 00:01:27,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:27,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 474 [2020-10-15 00:01:27,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:27,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:27,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-15 00:01:27,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:27,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-15 00:01:27,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:27,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:27,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:27,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:27,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:27,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:27,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:27,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:27,577 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:27,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:27,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:27,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:27,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:27,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912433945] [2020-10-15 00:01:27,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:27,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-15 00:01:27,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460046110] [2020-10-15 00:01:27,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-15 00:01:27,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:27,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-15 00:01:27,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:01:27,582 INFO L87 Difference]: Start difference. First operand 246 states and 326 transitions. Second operand 17 states. [2020-10-15 00:01:28,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:28,078 INFO L93 Difference]: Finished difference Result 398 states and 578 transitions. [2020-10-15 00:01:28,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-15 00:01:28,079 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-10-15 00:01:28,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:28,081 INFO L225 Difference]: With dead ends: 398 [2020-10-15 00:01:28,082 INFO L226 Difference]: Without dead ends: 377 [2020-10-15 00:01:28,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-15 00:01:28,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-10-15 00:01:28,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 263. [2020-10-15 00:01:28,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-15 00:01:28,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 351 transitions. [2020-10-15 00:01:28,110 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 351 transitions. Word has length 28 [2020-10-15 00:01:28,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:28,110 INFO L479 AbstractCegarLoop]: Abstraction has 263 states and 351 transitions. [2020-10-15 00:01:28,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-15 00:01:28,110 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 351 transitions. [2020-10-15 00:01:28,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 00:01:28,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:28,111 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:28,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-15 00:01:28,111 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:28,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:28,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1003308858, now seen corresponding path program 17 times [2020-10-15 00:01:28,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:28,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095810170] [2020-10-15 00:01:28,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:28,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:28,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:28,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:28,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:31,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:31,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-15 00:01:31,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:01:31,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3403 [2020-10-15 00:01:31,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:31,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:31,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-15 00:01:31,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 00:01:31,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-15 00:01:31,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:01:31,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:31,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:31,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:31,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:31,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:31,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:31,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:31,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:31,669 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:31,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:31,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:31,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:31,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-15 00:01:31,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095810170] [2020-10-15 00:01:31,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:31,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-15 00:01:31,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993362873] [2020-10-15 00:01:31,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 00:01:31,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:31,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 00:01:31,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:01:31,672 INFO L87 Difference]: Start difference. First operand 263 states and 351 transitions. Second operand 10 states. [2020-10-15 00:01:33,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:33,945 INFO L93 Difference]: Finished difference Result 306 states and 413 transitions. [2020-10-15 00:01:33,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 00:01:33,952 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-15 00:01:33,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:33,954 INFO L225 Difference]: With dead ends: 306 [2020-10-15 00:01:33,954 INFO L226 Difference]: Without dead ends: 300 [2020-10-15 00:01:33,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-15 00:01:33,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-10-15 00:01:33,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 294. [2020-10-15 00:01:33,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-15 00:01:33,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 394 transitions. [2020-10-15 00:01:33,988 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 394 transitions. Word has length 29 [2020-10-15 00:01:33,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:33,988 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 394 transitions. [2020-10-15 00:01:33,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 00:01:33,989 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 394 transitions. [2020-10-15 00:01:33,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-15 00:01:33,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:33,990 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:33,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-15 00:01:33,990 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:33,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:33,991 INFO L82 PathProgramCache]: Analyzing trace with hash -172419545, now seen corresponding path program 10 times [2020-10-15 00:01:33,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:33,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388149396] [2020-10-15 00:01:33,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:34,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:34,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:34,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:34,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:34,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-15 00:01:34,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 00:01:34,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 528 [2020-10-15 00:01:34,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:34,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:34,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-15 00:01:34,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:34,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-15 00:01:34,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:34,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:34,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:34,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:34,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:34,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:34,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:34,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:34,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:34,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:34,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:34,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:34,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:34,838 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 00:01:34,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388149396] [2020-10-15 00:01:34,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:34,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-15 00:01:34,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756805870] [2020-10-15 00:01:34,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-15 00:01:34,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:34,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-15 00:01:34,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:01:34,839 INFO L87 Difference]: Start difference. First operand 294 states and 394 transitions. Second operand 18 states. [2020-10-15 00:01:35,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:01:35,397 INFO L93 Difference]: Finished difference Result 474 states and 695 transitions. [2020-10-15 00:01:35,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-15 00:01:35,398 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2020-10-15 00:01:35,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:01:35,399 INFO L225 Difference]: With dead ends: 474 [2020-10-15 00:01:35,399 INFO L226 Difference]: Without dead ends: 451 [2020-10-15 00:01:35,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-15 00:01:35,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-10-15 00:01:35,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 313. [2020-10-15 00:01:35,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-10-15 00:01:35,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 422 transitions. [2020-10-15 00:01:35,428 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 422 transitions. Word has length 29 [2020-10-15 00:01:35,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:01:35,429 INFO L479 AbstractCegarLoop]: Abstraction has 313 states and 422 transitions. [2020-10-15 00:01:35,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-15 00:01:35,429 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 422 transitions. [2020-10-15 00:01:35,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 00:01:35,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:01:35,430 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:01:35,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-15 00:01:35,430 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:01:35,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:01:35,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1635256468, now seen corresponding path program 18 times [2020-10-15 00:01:35,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:01:35,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036044881] [2020-10-15 00:01:35,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:01:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:35,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:35,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:35,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:36,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:36,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:36,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-15 00:01:36,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:01:36,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1130 [2020-10-15 00:01:36,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:36,573 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:36,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-15 00:01:36,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:01:36,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-15 00:01:36,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:41,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:01:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:01:41,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:01:41,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:01:41,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:01:41,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:01:41,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:01:41,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:01:41,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:01:41,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:01:41,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:01:41,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:01:41,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:01:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-15 00:01:41,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036044881] [2020-10-15 00:01:41,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:01:41,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-15 00:01:41,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265353510] [2020-10-15 00:01:41,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-15 00:01:41,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:01:41,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-15 00:01:41,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=302, Unknown=2, NotChecked=0, Total=342 [2020-10-15 00:01:41,771 INFO L87 Difference]: Start difference. First operand 313 states and 422 transitions. Second operand 19 states. [2020-10-15 00:01:48,457 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2020-10-15 00:01:52,804 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2020-10-15 00:01:57,065 WARN L193 SmtUtils]: Spent 4.16 s on a formula simplification that was a NOOP. DAG size: 34 [2020-10-15 00:01:59,249 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2020-10-15 00:02:01,443 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2020-10-15 00:02:03,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:03,745 INFO L93 Difference]: Finished difference Result 362 states and 476 transitions. [2020-10-15 00:02:03,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-15 00:02:03,745 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 30 [2020-10-15 00:02:03,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:03,747 INFO L225 Difference]: With dead ends: 362 [2020-10-15 00:02:03,747 INFO L226 Difference]: Without dead ends: 347 [2020-10-15 00:02:03,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=82, Invalid=670, Unknown=4, NotChecked=0, Total=756 [2020-10-15 00:02:03,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-15 00:02:03,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 328. [2020-10-15 00:02:03,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-10-15 00:02:03,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 440 transitions. [2020-10-15 00:02:03,774 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 440 transitions. Word has length 30 [2020-10-15 00:02:03,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:03,775 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 440 transitions. [2020-10-15 00:02:03,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-15 00:02:03,775 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 440 transitions. [2020-10-15 00:02:03,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 00:02:03,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:03,776 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:03,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-15 00:02:03,776 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:03,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:03,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1565827596, now seen corresponding path program 19 times [2020-10-15 00:02:03,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:03,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758078137] [2020-10-15 00:02:03,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:03,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:03,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:03,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:08,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:08,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-15 00:02:08,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 00:02:08,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4674 [2020-10-15 00:02:08,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:08,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:08,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-15 00:02:08,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 00:02:08,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-15 00:02:08,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 00:02:08,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 00:02:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:08,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:08,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:08,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-15 00:02:08,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 00:02:08,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-15 00:02:08,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:08,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:08,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 00:02:08,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 00:02:08,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 00:02:08,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 00:02:08,659 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-15 00:02:08,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758078137] [2020-10-15 00:02:08,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 00:02:08,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-15 00:02:08,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813482948] [2020-10-15 00:02:08,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-15 00:02:08,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 00:02:08,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-15 00:02:08,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:02:08,660 INFO L87 Difference]: Start difference. First operand 328 states and 440 transitions. Second operand 11 states. [2020-10-15 00:02:08,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 00:02:08,909 INFO L93 Difference]: Finished difference Result 385 states and 522 transitions. [2020-10-15 00:02:08,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 00:02:08,910 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-15 00:02:08,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 00:02:08,912 INFO L225 Difference]: With dead ends: 385 [2020-10-15 00:02:08,913 INFO L226 Difference]: Without dead ends: 379 [2020-10-15 00:02:08,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-15 00:02:08,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-10-15 00:02:08,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 361. [2020-10-15 00:02:08,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-10-15 00:02:08,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 486 transitions. [2020-10-15 00:02:08,939 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 486 transitions. Word has length 30 [2020-10-15 00:02:08,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 00:02:08,940 INFO L479 AbstractCegarLoop]: Abstraction has 361 states and 486 transitions. [2020-10-15 00:02:08,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-15 00:02:08,940 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 486 transitions. [2020-10-15 00:02:08,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-15 00:02:08,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 00:02:08,941 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 00:02:08,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-15 00:02:08,942 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 00:02:08,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 00:02:08,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1879747484, now seen corresponding path program 20 times [2020-10-15 00:02:08,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 00:02:08,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945025498] [2020-10-15 00:02:08,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 00:02:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 00:02:08,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:09,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:09,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:09,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 00:02:10,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 00:02:10,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-15 00:02:10,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 00:02:10,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1916 [2020-10-15 00:02:10,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 00:02:10,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 00:02:10,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-15 00:02:10,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-15 00:02:10,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-15 00:02:10,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0