/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:42:01,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:42:01,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:42:01,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:42:01,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:42:01,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:42:01,902 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:42:01,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:42:01,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:42:01,907 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:42:01,908 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:42:01,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:42:01,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:42:01,910 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:42:01,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:42:01,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:42:01,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:42:01,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:42:01,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:42:01,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:42:01,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:42:01,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:42:01,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:42:01,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:42:01,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:42:01,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:42:01,926 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:42:01,927 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:42:01,928 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:42:01,929 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:42:01,929 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:42:01,930 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:42:01,930 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:42:01,931 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:42:01,932 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:42:01,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:42:01,933 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:42:01,933 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:42:01,934 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:42:01,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:42:01,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:42:01,936 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 04:42:01,960 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:42:01,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:42:01,962 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:42:01,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:42:01,962 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:42:01,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:42:01,963 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:42:01,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:42:01,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:42:01,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:42:01,964 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:42:01,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:42:01,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:42:01,965 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:42:01,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:42:01,966 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:42:01,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:42:01,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:42:01,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:42:01,966 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:42:01,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:42:01,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:42:01,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:42:01,968 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:42:01,969 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:42:01,969 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:42:01,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:42:01,969 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:42:01,970 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:42:01,970 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 04:42:02,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:42:02,307 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:42:02,311 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:42:02,314 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:42:02,315 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:42:02,317 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-2.i [2020-10-13 04:42:02,388 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6383addb8/8486811941bf4cf1a0982d357ca15a36/FLAG605da19fb [2020-10-13 04:42:02,842 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:42:02,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-2.i [2020-10-13 04:42:02,849 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6383addb8/8486811941bf4cf1a0982d357ca15a36/FLAG605da19fb [2020-10-13 04:42:03,247 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6383addb8/8486811941bf4cf1a0982d357ca15a36 [2020-10-13 04:42:03,258 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:42:03,259 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:42:03,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:42:03,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:42:03,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:42:03,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:42:03" (1/1) ... [2020-10-13 04:42:03,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d407afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:03, skipping insertion in model container [2020-10-13 04:42:03,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:42:03" (1/1) ... [2020-10-13 04:42:03,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:42:03,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:42:03,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:42:03,542 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:42:03,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:42:03,679 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:42:03,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:03 WrapperNode [2020-10-13 04:42:03,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:42:03,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:42:03,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:42:03,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:42:03,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:03" (1/1) ... [2020-10-13 04:42:03,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:03" (1/1) ... [2020-10-13 04:42:03,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:03" (1/1) ... [2020-10-13 04:42:03,704 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:03" (1/1) ... [2020-10-13 04:42:03,714 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:03" (1/1) ... [2020-10-13 04:42:03,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:03" (1/1) ... [2020-10-13 04:42:03,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:03" (1/1) ... [2020-10-13 04:42:03,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:42:03,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:42:03,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:42:03,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:42:03,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:03" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:42:03,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:42:03,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:42:03,805 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:42:03,805 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:42:03,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:42:03,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:42:03,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 04:42:03,807 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:42:03,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:42:03,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:42:03,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:42:03,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:42:03,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:42:03,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:42:04,129 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:42:04,130 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-13 04:42:04,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:42:04 BoogieIcfgContainer [2020-10-13 04:42:04,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:42:04,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:42:04,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:42:04,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:42:04,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:42:03" (1/3) ... [2020-10-13 04:42:04,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f6825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:42:04, skipping insertion in model container [2020-10-13 04:42:04,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:42:03" (2/3) ... [2020-10-13 04:42:04,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f6825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:42:04, skipping insertion in model container [2020-10-13 04:42:04,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:42:04" (3/3) ... [2020-10-13 04:42:04,157 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-2.i [2020-10-13 04:42:04,171 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:42:04,181 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:42:04,202 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:42:04,236 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:42:04,236 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:42:04,236 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:42:04,237 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:42:04,237 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:42:04,237 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:42:04,237 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:42:04,238 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:42:04,268 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-10-13 04:42:04,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 04:42:04,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:04,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:04,290 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:04,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:04,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1156372912, now seen corresponding path program 1 times [2020-10-13 04:42:04,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:04,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622306081] [2020-10-13 04:42:04,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:04,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:04,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:04,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:04,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:04,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 04:42:04,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:04,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-13 04:42:04,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:04,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:04,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:42:04,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:04,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 04:42:04,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:04,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:04,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:04,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:04,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:04,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 04:42:04,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:04,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:04,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:04,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:04,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:42:04,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622306081] [2020-10-13 04:42:04,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:42:04,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:42:04,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205214173] [2020-10-13 04:42:04,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:42:04,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:04,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:42:04,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:42:04,735 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2020-10-13 04:42:04,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:04,907 INFO L93 Difference]: Finished difference Result 82 states and 123 transitions. [2020-10-13 04:42:04,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:42:04,910 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-13 04:42:04,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:04,921 INFO L225 Difference]: With dead ends: 82 [2020-10-13 04:42:04,921 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 04:42:04,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:42:04,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 04:42:04,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-13 04:42:04,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 04:42:04,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-10-13 04:42:04,979 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 16 [2020-10-13 04:42:04,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:04,979 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-10-13 04:42:04,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:42:04,980 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-10-13 04:42:04,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 04:42:04,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:04,981 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:04,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:42:04,982 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:04,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:04,982 INFO L82 PathProgramCache]: Analyzing trace with hash -2078459264, now seen corresponding path program 1 times [2020-10-13 04:42:04,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:04,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886945479] [2020-10-13 04:42:04,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:04,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:05,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:05,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:05,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:05,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 04:42:05,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:05,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-13 04:42:05,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:05,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:42:05,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:05,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:42:05,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:05,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:05,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:05,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:05,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:05,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:05,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:05,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 04:42:05,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:05,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:05,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:05,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:05,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:42:05,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886945479] [2020-10-13 04:42:05,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:42:05,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:42:05,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631526419] [2020-10-13 04:42:05,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:42:05,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:05,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:42:05,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:42:05,224 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 4 states. [2020-10-13 04:42:05,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:05,373 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2020-10-13 04:42:05,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:42:05,374 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-13 04:42:05,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:05,376 INFO L225 Difference]: With dead ends: 74 [2020-10-13 04:42:05,376 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 04:42:05,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:42:05,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 04:42:05,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-13 04:42:05,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 04:42:05,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2020-10-13 04:42:05,388 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 16 [2020-10-13 04:42:05,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:05,389 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2020-10-13 04:42:05,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:42:05,389 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2020-10-13 04:42:05,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 04:42:05,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:05,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:05,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:42:05,391 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:05,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:05,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1609541534, now seen corresponding path program 1 times [2020-10-13 04:42:05,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:05,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635904272] [2020-10-13 04:42:05,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:05,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:05,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:05,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:05,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 04:42:05,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:05,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 237 [2020-10-13 04:42:05,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:05,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:42:05,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 04:42:05,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:42:05,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:05,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:05,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:05,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:05,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:05,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:05,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:42:05,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:05,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:05,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:05,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:05,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:42:05,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635904272] [2020-10-13 04:42:05,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:42:05,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:42:05,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85640876] [2020-10-13 04:42:05,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:42:05,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:05,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:42:05,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:42:05,686 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand 4 states. [2020-10-13 04:42:05,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:05,882 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2020-10-13 04:42:05,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:42:05,883 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-13 04:42:05,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:05,884 INFO L225 Difference]: With dead ends: 72 [2020-10-13 04:42:05,885 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 04:42:05,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:42:05,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 04:42:05,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-10-13 04:42:05,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 04:42:05,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2020-10-13 04:42:05,909 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 18 [2020-10-13 04:42:05,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:05,911 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2020-10-13 04:42:05,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:42:05,911 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2020-10-13 04:42:05,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 04:42:05,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:05,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:05,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:42:05,914 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:05,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:05,915 INFO L82 PathProgramCache]: Analyzing trace with hash -898844059, now seen corresponding path program 1 times [2020-10-13 04:42:05,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:05,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155359329] [2020-10-13 04:42:05,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:05,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:05,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:05,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:05,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:06,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:06,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 04:42:06,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:42:06,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 572 [2020-10-13 04:42:06,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:06,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:42:06,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 04:42:06,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 04:42:06,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:06,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:06,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:06,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:06,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:06,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:06,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:06,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:06,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:06,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:06,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:06,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:42:06,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155359329] [2020-10-13 04:42:06,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:42:06,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:42:06,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676325308] [2020-10-13 04:42:06,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:42:06,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:06,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:42:06,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:42:06,555 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 4 states. [2020-10-13 04:42:06,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:06,721 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2020-10-13 04:42:06,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:42:06,722 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-13 04:42:06,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:06,723 INFO L225 Difference]: With dead ends: 90 [2020-10-13 04:42:06,724 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 04:42:06,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:42:06,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 04:42:06,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2020-10-13 04:42:06,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 04:42:06,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2020-10-13 04:42:06,732 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 20 [2020-10-13 04:42:06,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:06,733 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2020-10-13 04:42:06,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:42:06,733 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2020-10-13 04:42:06,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 04:42:06,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:06,734 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:06,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:42:06,735 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:06,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:06,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1708190685, now seen corresponding path program 1 times [2020-10-13 04:42:06,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:06,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244556712] [2020-10-13 04:42:06,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:06,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:06,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:06,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:06,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:06,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:06,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 04:42:06,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:06,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-13 04:42:06,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:06,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:42:06,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 04:42:06,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 04:42:06,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:06,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:06,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:06,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:06,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:06,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:06,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:06,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:06,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:06,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:06,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:06,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:42:06,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244556712] [2020-10-13 04:42:06,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:42:06,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 04:42:06,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012848146] [2020-10-13 04:42:06,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:42:06,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:06,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:42:06,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:42:06,991 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand 5 states. [2020-10-13 04:42:07,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:07,141 INFO L93 Difference]: Finished difference Result 106 states and 143 transitions. [2020-10-13 04:42:07,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:42:07,142 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-13 04:42:07,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:07,143 INFO L225 Difference]: With dead ends: 106 [2020-10-13 04:42:07,143 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 04:42:07,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:42:07,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 04:42:07,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 47. [2020-10-13 04:42:07,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 04:42:07,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2020-10-13 04:42:07,152 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 20 [2020-10-13 04:42:07,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:07,152 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2020-10-13 04:42:07,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:42:07,153 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2020-10-13 04:42:07,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 04:42:07,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:07,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:07,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:42:07,154 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:07,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:07,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1561235658, now seen corresponding path program 1 times [2020-10-13 04:42:07,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:07,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370311747] [2020-10-13 04:42:07,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:07,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:07,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:07,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:07,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:07,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 04:42:07,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:07,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 393 [2020-10-13 04:42:07,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:07,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:42:07,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:07,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:42:07,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:07,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:07,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:07,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:07,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:07,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:07,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:07,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:07,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:07,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:07,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:07,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:42:07,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370311747] [2020-10-13 04:42:07,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:07,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:42:07,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983211563] [2020-10-13 04:42:07,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:42:07,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:07,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:42:07,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:42:07,598 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand 5 states. [2020-10-13 04:42:07,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:07,699 INFO L93 Difference]: Finished difference Result 88 states and 114 transitions. [2020-10-13 04:42:07,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:42:07,700 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-13 04:42:07,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:07,701 INFO L225 Difference]: With dead ends: 88 [2020-10-13 04:42:07,701 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 04:42:07,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:42:07,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 04:42:07,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-13 04:42:07,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 04:42:07,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2020-10-13 04:42:07,709 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 23 [2020-10-13 04:42:07,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:07,710 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2020-10-13 04:42:07,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:42:07,710 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2020-10-13 04:42:07,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 04:42:07,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:07,711 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:07,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:42:07,712 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:07,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:07,712 INFO L82 PathProgramCache]: Analyzing trace with hash -159559916, now seen corresponding path program 2 times [2020-10-13 04:42:07,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:07,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917773425] [2020-10-13 04:42:07,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:07,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:07,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:07,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:07,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:08,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:08,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 04:42:08,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:08,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 548 [2020-10-13 04:42:08,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:08,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:42:08,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 04:42:08,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:42:08,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:08,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:08,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:08,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:08,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:08,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:08,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:42:08,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:08,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:08,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:08,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:08,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 04:42:08,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917773425] [2020-10-13 04:42:08,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:08,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:42:08,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886428063] [2020-10-13 04:42:08,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:42:08,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:08,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:42:08,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:42:08,329 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand 6 states. [2020-10-13 04:42:08,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:08,508 INFO L93 Difference]: Finished difference Result 114 states and 154 transitions. [2020-10-13 04:42:08,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:42:08,508 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-13 04:42:08,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:08,509 INFO L225 Difference]: With dead ends: 114 [2020-10-13 04:42:08,510 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 04:42:08,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:42:08,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 04:42:08,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 54. [2020-10-13 04:42:08,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 04:42:08,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2020-10-13 04:42:08,533 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 25 [2020-10-13 04:42:08,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:08,534 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2020-10-13 04:42:08,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:42:08,534 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2020-10-13 04:42:08,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 04:42:08,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:08,536 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:08,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:42:08,538 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:08,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:08,539 INFO L82 PathProgramCache]: Analyzing trace with hash -2139625433, now seen corresponding path program 3 times [2020-10-13 04:42:08,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:08,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258576378] [2020-10-13 04:42:08,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:08,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:08,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:08,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:09,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:09,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 04:42:09,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:09,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1027 [2020-10-13 04:42:09,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:09,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:42:09,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:09,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:42:09,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:09,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:09,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:09,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:09,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:09,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:09,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:09,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:09,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:09,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:09,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:09,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:09,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 04:42:09,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258576378] [2020-10-13 04:42:09,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:09,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:42:09,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123043614] [2020-10-13 04:42:09,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:42:09,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:09,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:42:09,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:42:09,629 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 6 states. [2020-10-13 04:42:09,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:09,747 INFO L93 Difference]: Finished difference Result 100 states and 128 transitions. [2020-10-13 04:42:09,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:42:09,748 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-13 04:42:09,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:09,749 INFO L225 Difference]: With dead ends: 100 [2020-10-13 04:42:09,749 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 04:42:09,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:42:09,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 04:42:09,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-13 04:42:09,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 04:42:09,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-10-13 04:42:09,757 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 28 [2020-10-13 04:42:09,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:09,758 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-10-13 04:42:09,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:42:09,758 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-10-13 04:42:09,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 04:42:09,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:09,759 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:09,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:42:09,759 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:09,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:09,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1353497847, now seen corresponding path program 4 times [2020-10-13 04:42:09,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:09,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012249451] [2020-10-13 04:42:09,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:09,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:09,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:09,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:10,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:10,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 04:42:10,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:10,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1055 [2020-10-13 04:42:10,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:10,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:42:10,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:10,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:42:10,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:10,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:10,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:10,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:10,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:10,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:10,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:10,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:42:10,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:10,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:10,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:10,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:10,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:10,887 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 04:42:10,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012249451] [2020-10-13 04:42:10,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:10,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:42:10,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655851405] [2020-10-13 04:42:10,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:42:10,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:10,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:42:10,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:42:10,890 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 7 states. [2020-10-13 04:42:11,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:11,065 INFO L93 Difference]: Finished difference Result 102 states and 130 transitions. [2020-10-13 04:42:11,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:42:11,066 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-13 04:42:11,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:11,068 INFO L225 Difference]: With dead ends: 102 [2020-10-13 04:42:11,071 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 04:42:11,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:42:11,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 04:42:11,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-13 04:42:11,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 04:42:11,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-10-13 04:42:11,089 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 30 [2020-10-13 04:42:11,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:11,093 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-10-13 04:42:11,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:42:11,094 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-10-13 04:42:11,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 04:42:11,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:11,095 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:11,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:42:11,096 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:11,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:11,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1799131797, now seen corresponding path program 5 times [2020-10-13 04:42:11,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:11,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608451154] [2020-10-13 04:42:11,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:11,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:11,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:11,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:12,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:12,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 04:42:12,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:12,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1699 [2020-10-13 04:42:12,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:12,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:42:12,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 04:42:12,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 04:42:12,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:12,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:12,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:12,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:12,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:12,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:12,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:42:12,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:12,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:12,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:12,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:12,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:12,882 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 04:42:12,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608451154] [2020-10-13 04:42:12,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:12,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:42:12,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404025554] [2020-10-13 04:42:12,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:42:12,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:12,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:42:12,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:42:12,884 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 7 states. [2020-10-13 04:42:13,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:13,076 INFO L93 Difference]: Finished difference Result 124 states and 166 transitions. [2020-10-13 04:42:13,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:42:13,076 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-13 04:42:13,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:13,077 INFO L225 Difference]: With dead ends: 124 [2020-10-13 04:42:13,078 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 04:42:13,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:42:13,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 04:42:13,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 64. [2020-10-13 04:42:13,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 04:42:13,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-10-13 04:42:13,088 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 32 [2020-10-13 04:42:13,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:13,088 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-10-13 04:42:13,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:42:13,089 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-10-13 04:42:13,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 04:42:13,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:13,093 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:13,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:42:13,094 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:13,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:13,094 INFO L82 PathProgramCache]: Analyzing trace with hash 37525104, now seen corresponding path program 6 times [2020-10-13 04:42:13,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:13,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111760058] [2020-10-13 04:42:13,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:13,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:13,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:13,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:14,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:14,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 04:42:14,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:14,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1711 [2020-10-13 04:42:14,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:14,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:42:14,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:14,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:42:14,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:14,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:14,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:14,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:14,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:14,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:14,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:14,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:14,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:14,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:14,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:14,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:14,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:14,879 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:42:14,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111760058] [2020-10-13 04:42:14,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:14,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:42:14,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787641901] [2020-10-13 04:42:14,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:42:14,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:14,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:42:14,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:42:14,883 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 8 states. [2020-10-13 04:42:14,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:14,997 INFO L93 Difference]: Finished difference Result 116 states and 148 transitions. [2020-10-13 04:42:14,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:42:14,997 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-13 04:42:14,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:14,998 INFO L225 Difference]: With dead ends: 116 [2020-10-13 04:42:14,998 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 04:42:15,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:42:15,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 04:42:15,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-13 04:42:15,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 04:42:15,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2020-10-13 04:42:15,011 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 35 [2020-10-13 04:42:15,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:15,011 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-10-13 04:42:15,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:42:15,012 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2020-10-13 04:42:15,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 04:42:15,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:15,016 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:15,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:42:15,016 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:15,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:15,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1435605326, now seen corresponding path program 7 times [2020-10-13 04:42:15,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:15,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714604034] [2020-10-13 04:42:15,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:15,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:15,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:15,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:15,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:17,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:17,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 04:42:17,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:17,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1971 [2020-10-13 04:42:17,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:17,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:42:17,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:17,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:42:17,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:17,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:17,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:17,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:17,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:17,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:17,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:17,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:17,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:17,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:17,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:17,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:42:17,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714604034] [2020-10-13 04:42:17,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:17,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:42:17,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648763092] [2020-10-13 04:42:17,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:42:17,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:17,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:42:17,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:42:17,075 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 9 states. [2020-10-13 04:42:17,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:17,194 INFO L93 Difference]: Finished difference Result 118 states and 150 transitions. [2020-10-13 04:42:17,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:42:17,195 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-13 04:42:17,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:17,196 INFO L225 Difference]: With dead ends: 118 [2020-10-13 04:42:17,196 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 04:42:17,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:42:17,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 04:42:17,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-10-13 04:42:17,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 04:42:17,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2020-10-13 04:42:17,206 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 37 [2020-10-13 04:42:17,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:17,207 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2020-10-13 04:42:17,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:42:17,207 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2020-10-13 04:42:17,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 04:42:17,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:17,212 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:17,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:42:17,212 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:17,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:17,213 INFO L82 PathProgramCache]: Analyzing trace with hash 665935020, now seen corresponding path program 8 times [2020-10-13 04:42:17,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:17,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892684702] [2020-10-13 04:42:17,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:17,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:17,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:17,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:19,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:19,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 04:42:19,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:19,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2077 [2020-10-13 04:42:19,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:19,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:42:19,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 04:42:19,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:42:19,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:19,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:19,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:19,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:19,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:19,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:19,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:19,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:19,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:19,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:19,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:19,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:19,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-13 04:42:19,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892684702] [2020-10-13 04:42:19,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:19,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:42:19,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197312757] [2020-10-13 04:42:19,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:42:19,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:19,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:42:19,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:42:19,363 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand 8 states. [2020-10-13 04:42:19,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:19,554 INFO L93 Difference]: Finished difference Result 134 states and 178 transitions. [2020-10-13 04:42:19,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:42:19,554 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2020-10-13 04:42:19,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:19,555 INFO L225 Difference]: With dead ends: 134 [2020-10-13 04:42:19,556 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 04:42:19,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:42:19,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 04:42:19,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 74. [2020-10-13 04:42:19,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 04:42:19,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2020-10-13 04:42:19,562 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 39 [2020-10-13 04:42:19,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:19,562 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2020-10-13 04:42:19,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:42:19,563 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2020-10-13 04:42:19,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 04:42:19,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:19,563 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:19,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:42:19,564 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:19,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:19,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1492243343, now seen corresponding path program 9 times [2020-10-13 04:42:19,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:19,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519506264] [2020-10-13 04:42:19,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:19,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:19,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:19,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:21,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:21,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 04:42:21,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:21,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2170 [2020-10-13 04:42:21,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:21,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:42:21,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:21,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:42:21,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:21,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:21,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:21,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:21,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:21,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:21,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:21,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:21,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:21,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:21,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:21,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 04:42:21,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519506264] [2020-10-13 04:42:21,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:21,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:42:21,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385227286] [2020-10-13 04:42:21,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:42:21,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:21,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:42:21,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:42:21,826 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand 10 states. [2020-10-13 04:42:21,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:21,946 INFO L93 Difference]: Finished difference Result 132 states and 168 transitions. [2020-10-13 04:42:21,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:42:21,947 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-13 04:42:21,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:21,948 INFO L225 Difference]: With dead ends: 132 [2020-10-13 04:42:21,948 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 04:42:21,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:42:21,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 04:42:21,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-13 04:42:21,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 04:42:21,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 94 transitions. [2020-10-13 04:42:21,957 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 94 transitions. Word has length 42 [2020-10-13 04:42:21,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:21,957 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 94 transitions. [2020-10-13 04:42:21,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:42:21,958 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 94 transitions. [2020-10-13 04:42:21,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 04:42:21,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:21,958 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:21,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:42:21,959 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:21,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:21,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1671133937, now seen corresponding path program 10 times [2020-10-13 04:42:21,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:21,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359749393] [2020-10-13 04:42:21,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:21,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:22,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:22,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:24,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:24,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 04:42:24,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:24,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2475 [2020-10-13 04:42:24,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:24,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:42:24,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 04:42:24,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 04:42:24,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:24,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:24,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:24,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:24,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:24,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:24,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:24,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:24,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:24,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:24,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:24,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:24,520 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-13 04:42:24,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359749393] [2020-10-13 04:42:24,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:24,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:42:24,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194740] [2020-10-13 04:42:24,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:42:24,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:24,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:42:24,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:42:24,523 INFO L87 Difference]: Start difference. First operand 76 states and 94 transitions. Second operand 9 states. [2020-10-13 04:42:24,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:24,748 INFO L93 Difference]: Finished difference Result 142 states and 188 transitions. [2020-10-13 04:42:24,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:42:24,749 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2020-10-13 04:42:24,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:24,751 INFO L225 Difference]: With dead ends: 142 [2020-10-13 04:42:24,751 INFO L226 Difference]: Without dead ends: 107 [2020-10-13 04:42:24,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:42:24,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-13 04:42:24,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 82. [2020-10-13 04:42:24,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 04:42:24,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 102 transitions. [2020-10-13 04:42:24,762 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 102 transitions. Word has length 44 [2020-10-13 04:42:24,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:24,763 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 102 transitions. [2020-10-13 04:42:24,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:42:24,763 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 102 transitions. [2020-10-13 04:42:24,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 04:42:24,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:24,764 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:24,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:42:24,765 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:24,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:24,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1433775318, now seen corresponding path program 11 times [2020-10-13 04:42:24,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:24,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456859243] [2020-10-13 04:42:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:24,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:24,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:24,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:27,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:27,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 04:42:27,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:27,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3128 [2020-10-13 04:42:27,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:27,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:42:27,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:27,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:42:27,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:27,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:27,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:27,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:27,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:27,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:27,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:27,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:27,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:27,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:27,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:27,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:27,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:27,992 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-13 04:42:27,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456859243] [2020-10-13 04:42:27,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:27,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:42:27,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555190342] [2020-10-13 04:42:27,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:42:27,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:27,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:42:27,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:42:27,998 INFO L87 Difference]: Start difference. First operand 82 states and 102 transitions. Second operand 11 states. [2020-10-13 04:42:28,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:28,154 INFO L93 Difference]: Finished difference Result 146 states and 186 transitions. [2020-10-13 04:42:28,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:42:28,155 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-13 04:42:28,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:28,156 INFO L225 Difference]: With dead ends: 146 [2020-10-13 04:42:28,156 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 04:42:28,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:42:28,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 04:42:28,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2020-10-13 04:42:28,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-13 04:42:28,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2020-10-13 04:42:28,163 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 47 [2020-10-13 04:42:28,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:28,163 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2020-10-13 04:42:28,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:42:28,164 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2020-10-13 04:42:28,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 04:42:28,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:28,165 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:28,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:42:28,165 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:28,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:28,166 INFO L82 PathProgramCache]: Analyzing trace with hash -2113144568, now seen corresponding path program 12 times [2020-10-13 04:42:28,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:28,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146897684] [2020-10-13 04:42:28,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:28,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:28,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:28,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:30,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:30,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 04:42:30,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:30,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2591 [2020-10-13 04:42:30,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:30,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:42:30,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 04:42:30,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:42:30,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:30,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:30,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:30,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:30,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:30,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:30,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:30,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:30,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:30,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:30,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:30,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:30,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 04:42:30,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146897684] [2020-10-13 04:42:30,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:30,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:42:30,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667220954] [2020-10-13 04:42:30,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:42:30,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:30,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:42:30,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:42:30,850 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand 10 states. [2020-10-13 04:42:31,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:31,078 INFO L93 Difference]: Finished difference Result 150 states and 198 transitions. [2020-10-13 04:42:31,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:42:31,079 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2020-10-13 04:42:31,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:31,080 INFO L225 Difference]: With dead ends: 150 [2020-10-13 04:42:31,080 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 04:42:31,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:42:31,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 04:42:31,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2020-10-13 04:42:31,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 04:42:31,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2020-10-13 04:42:31,087 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 49 [2020-10-13 04:42:31,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:31,087 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2020-10-13 04:42:31,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:42:31,088 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2020-10-13 04:42:31,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 04:42:31,088 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:31,088 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:31,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:42:31,089 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:31,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:31,089 INFO L82 PathProgramCache]: Analyzing trace with hash -278165069, now seen corresponding path program 13 times [2020-10-13 04:42:31,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:31,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972197850] [2020-10-13 04:42:31,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:31,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:31,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:31,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:31,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:33,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:33,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 04:42:33,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:33,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2849 [2020-10-13 04:42:33,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:33,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:42:33,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:33,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:42:33,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:34,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:34,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:34,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:34,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:34,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:34,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:34,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:34,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:34,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:34,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:34,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:34,045 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-13 04:42:34,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972197850] [2020-10-13 04:42:34,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:34,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:42:34,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182258648] [2020-10-13 04:42:34,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:42:34,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:34,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:42:34,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:42:34,048 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand 12 states. [2020-10-13 04:42:34,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:34,173 INFO L93 Difference]: Finished difference Result 160 states and 204 transitions. [2020-10-13 04:42:34,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:42:34,173 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-10-13 04:42:34,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:34,174 INFO L225 Difference]: With dead ends: 160 [2020-10-13 04:42:34,175 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 04:42:34,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:42:34,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 04:42:34,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2020-10-13 04:42:34,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 04:42:34,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2020-10-13 04:42:34,181 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 114 transitions. Word has length 52 [2020-10-13 04:42:34,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:34,181 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 114 transitions. [2020-10-13 04:42:34,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:42:34,181 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 114 transitions. [2020-10-13 04:42:34,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 04:42:34,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:34,182 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:34,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:42:34,183 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:34,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:34,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1426268523, now seen corresponding path program 14 times [2020-10-13 04:42:34,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:34,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215749669] [2020-10-13 04:42:34,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:34,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:34,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:34,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:34,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:37,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:37,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 04:42:37,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:37,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3335 [2020-10-13 04:42:37,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:37,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:42:37,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:37,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:42:37,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:37,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:37,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:37,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:37,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:37,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:37,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:37,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:37,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:37,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:37,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:37,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:37,618 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-13 04:42:37,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215749669] [2020-10-13 04:42:37,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:37,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:42:37,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569329077] [2020-10-13 04:42:37,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:42:37,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:37,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:42:37,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:42:37,620 INFO L87 Difference]: Start difference. First operand 92 states and 114 transitions. Second operand 13 states. [2020-10-13 04:42:37,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:37,755 INFO L93 Difference]: Finished difference Result 162 states and 206 transitions. [2020-10-13 04:42:37,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:42:37,755 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2020-10-13 04:42:37,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:37,757 INFO L225 Difference]: With dead ends: 162 [2020-10-13 04:42:37,757 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 04:42:37,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:42:37,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 04:42:37,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2020-10-13 04:42:37,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 04:42:37,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2020-10-13 04:42:37,764 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 54 [2020-10-13 04:42:37,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:37,765 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2020-10-13 04:42:37,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:42:37,765 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2020-10-13 04:42:37,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 04:42:37,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:37,766 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:37,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:42:37,766 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:37,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:37,766 INFO L82 PathProgramCache]: Analyzing trace with hash -947092745, now seen corresponding path program 15 times [2020-10-13 04:42:37,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:37,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025611299] [2020-10-13 04:42:37,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:37,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:37,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:37,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:41,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:41,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 04:42:41,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:41,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4078 [2020-10-13 04:42:41,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:41,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:42:41,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 04:42:41,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 04:42:41,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:41,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:41,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:41,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:41,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:41,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:41,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:41,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:41,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:41,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:41,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:41,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:41,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:41,954 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-13 04:42:41,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025611299] [2020-10-13 04:42:41,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:41,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:42:41,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712616721] [2020-10-13 04:42:41,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:42:41,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:41,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:42:41,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:42:41,958 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand 11 states. [2020-10-13 04:42:42,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:42,321 INFO L93 Difference]: Finished difference Result 160 states and 210 transitions. [2020-10-13 04:42:42,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:42:42,321 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-13 04:42:42,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:42,323 INFO L225 Difference]: With dead ends: 160 [2020-10-13 04:42:42,323 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 04:42:42,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:42:42,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 04:42:42,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 100. [2020-10-13 04:42:42,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 04:42:42,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2020-10-13 04:42:42,334 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 56 [2020-10-13 04:42:42,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:42,335 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2020-10-13 04:42:42,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:42:42,335 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2020-10-13 04:42:42,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 04:42:42,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:42,336 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:42,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:42:42,336 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:42,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:42,336 INFO L82 PathProgramCache]: Analyzing trace with hash -123796124, now seen corresponding path program 16 times [2020-10-13 04:42:42,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:42,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822675386] [2020-10-13 04:42:42,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:42,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:42,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:42,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:47,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:47,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 04:42:47,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:47,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4758 [2020-10-13 04:42:47,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:47,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:42:47,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:47,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:42:47,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:47,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:47,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:47,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:47,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:47,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:47,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:47,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:47,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:47,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:47,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:47,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:47,231 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-13 04:42:47,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822675386] [2020-10-13 04:42:47,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:47,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:42:47,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386758387] [2020-10-13 04:42:47,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:42:47,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:47,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:42:47,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:42:47,234 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand 14 states. [2020-10-13 04:42:47,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:47,430 INFO L93 Difference]: Finished difference Result 176 states and 224 transitions. [2020-10-13 04:42:47,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:42:47,431 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2020-10-13 04:42:47,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:47,433 INFO L225 Difference]: With dead ends: 176 [2020-10-13 04:42:47,433 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 04:42:47,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:42:47,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 04:42:47,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-13 04:42:47,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 04:42:47,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2020-10-13 04:42:47,440 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 59 [2020-10-13 04:42:47,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:47,440 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2020-10-13 04:42:47,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:42:47,440 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2020-10-13 04:42:47,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 04:42:47,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:47,449 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:47,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:42:47,449 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:47,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:47,450 INFO L82 PathProgramCache]: Analyzing trace with hash -546255294, now seen corresponding path program 17 times [2020-10-13 04:42:47,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:47,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259751593] [2020-10-13 04:42:47,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:47,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:47,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:47,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:52,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:52,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 04:42:52,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:52,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:42:52,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:52,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:42:52,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 04:42:52,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:42:52,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:52,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:52,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:52,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:52,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:52,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:52,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:52,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:52,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:52,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:52,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:52,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:52,576 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-13 04:42:52,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259751593] [2020-10-13 04:42:52,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:52,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:42:52,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750683896] [2020-10-13 04:42:52,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:42:52,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:52,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:42:52,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:42:52,585 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand 12 states. [2020-10-13 04:42:52,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:52,841 INFO L93 Difference]: Finished difference Result 168 states and 220 transitions. [2020-10-13 04:42:52,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:42:52,843 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-10-13 04:42:52,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:52,844 INFO L225 Difference]: With dead ends: 168 [2020-10-13 04:42:52,845 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 04:42:52,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:42:52,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 04:42:52,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 108. [2020-10-13 04:42:52,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 04:42:52,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 134 transitions. [2020-10-13 04:42:52,859 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 134 transitions. Word has length 61 [2020-10-13 04:42:52,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:52,859 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 134 transitions. [2020-10-13 04:42:52,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:42:52,859 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 134 transitions. [2020-10-13 04:42:52,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 04:42:52,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:52,860 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:52,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:42:52,862 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:52,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:52,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1215623737, now seen corresponding path program 18 times [2020-10-13 04:42:52,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:52,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108330128] [2020-10-13 04:42:52,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:52,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:52,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:53,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:57,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:57,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 04:42:57,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:57,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:42:57,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:57,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:42:57,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:57,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:42:57,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:58,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:58,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:58,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:58,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:58,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:58,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:58,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:58,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:58,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:58,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:58,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-13 04:42:58,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108330128] [2020-10-13 04:42:58,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:58,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:42:58,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692511728] [2020-10-13 04:42:58,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:42:58,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:58,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:42:58,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:42:58,010 INFO L87 Difference]: Start difference. First operand 108 states and 134 transitions. Second operand 15 states. [2020-10-13 04:42:58,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:58,144 INFO L93 Difference]: Finished difference Result 190 states and 242 transitions. [2020-10-13 04:42:58,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:42:58,144 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-10-13 04:42:58,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:58,145 INFO L225 Difference]: With dead ends: 190 [2020-10-13 04:42:58,145 INFO L226 Difference]: Without dead ends: 111 [2020-10-13 04:42:58,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:42:58,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-13 04:42:58,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-13 04:42:58,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 04:42:58,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 136 transitions. [2020-10-13 04:42:58,153 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 136 transitions. Word has length 64 [2020-10-13 04:42:58,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:58,153 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 136 transitions. [2020-10-13 04:42:58,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:42:58,153 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 136 transitions. [2020-10-13 04:42:58,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 04:42:58,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:58,154 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:58,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:42:58,155 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:58,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:58,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1068235749, now seen corresponding path program 19 times [2020-10-13 04:42:58,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:58,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513679138] [2020-10-13 04:42:58,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:58,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:58,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:58,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:03,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:03,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 04:43:03,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:43:03,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 04:43:03,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:03,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:43:03,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:03,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:43:03,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:03,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:03,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:03,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:03,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:03,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:03,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:03,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:03,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:03,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:03,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:03,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:03,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:03,324 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-13 04:43:03,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513679138] [2020-10-13 04:43:03,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:03,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:43:03,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009542448] [2020-10-13 04:43:03,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:43:03,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:03,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:43:03,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:43:03,325 INFO L87 Difference]: Start difference. First operand 110 states and 136 transitions. Second operand 16 states. [2020-10-13 04:43:03,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:03,496 INFO L93 Difference]: Finished difference Result 192 states and 244 transitions. [2020-10-13 04:43:03,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:43:03,497 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 66 [2020-10-13 04:43:03,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:03,500 INFO L225 Difference]: With dead ends: 192 [2020-10-13 04:43:03,500 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 04:43:03,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:43:03,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 04:43:03,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-13 04:43:03,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 04:43:03,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2020-10-13 04:43:03,514 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 66 [2020-10-13 04:43:03,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:03,515 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2020-10-13 04:43:03,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:43:03,515 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2020-10-13 04:43:03,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 04:43:03,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:03,516 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:03,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:43:03,518 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:03,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:03,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1128913539, now seen corresponding path program 20 times [2020-10-13 04:43:03,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:03,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601447933] [2020-10-13 04:43:03,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:03,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:03,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:03,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:08,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:08,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 04:43:08,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:43:08,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:43:08,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:08,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:43:08,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 04:43:08,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 04:43:08,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:08,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:08,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:08,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:08,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:08,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:08,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:43:08,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:08,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:08,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:08,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:08,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2020-10-13 04:43:08,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601447933] [2020-10-13 04:43:08,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:08,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:43:08,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766829252] [2020-10-13 04:43:08,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:43:08,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:08,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:43:08,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:43:08,641 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand 13 states. [2020-10-13 04:43:08,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:08,889 INFO L93 Difference]: Finished difference Result 178 states and 232 transitions. [2020-10-13 04:43:08,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:43:08,889 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 68 [2020-10-13 04:43:08,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:08,892 INFO L225 Difference]: With dead ends: 178 [2020-10-13 04:43:08,892 INFO L226 Difference]: Without dead ends: 143 [2020-10-13 04:43:08,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:43:08,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-13 04:43:08,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 118. [2020-10-13 04:43:08,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 04:43:08,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 146 transitions. [2020-10-13 04:43:08,899 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 146 transitions. Word has length 68 [2020-10-13 04:43:08,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:08,899 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 146 transitions. [2020-10-13 04:43:08,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:43:08,900 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 146 transitions. [2020-10-13 04:43:08,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 04:43:08,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:08,900 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:08,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:43:08,901 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:08,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:08,901 INFO L82 PathProgramCache]: Analyzing trace with hash -793309922, now seen corresponding path program 21 times [2020-10-13 04:43:08,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:08,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737205997] [2020-10-13 04:43:08,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:08,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:08,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:08,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:09,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:13,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:13,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 04:43:13,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:43:13,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:43:13,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:13,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:43:13,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:13,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:43:13,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:14,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:14,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:14,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:14,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:14,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:14,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:14,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:14,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:14,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:14,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:14,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:14,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:14,086 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-13 04:43:14,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737205997] [2020-10-13 04:43:14,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:14,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:43:14,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282527340] [2020-10-13 04:43:14,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:43:14,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:14,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:43:14,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:43:14,088 INFO L87 Difference]: Start difference. First operand 118 states and 146 transitions. Second operand 17 states. [2020-10-13 04:43:14,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:14,258 INFO L93 Difference]: Finished difference Result 206 states and 262 transitions. [2020-10-13 04:43:14,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:43:14,259 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-10-13 04:43:14,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:14,260 INFO L225 Difference]: With dead ends: 206 [2020-10-13 04:43:14,260 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 04:43:14,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:43:14,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 04:43:14,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-13 04:43:14,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 04:43:14,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 148 transitions. [2020-10-13 04:43:14,269 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 148 transitions. Word has length 71 [2020-10-13 04:43:14,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:14,270 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 148 transitions. [2020-10-13 04:43:14,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:43:14,270 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 148 transitions. [2020-10-13 04:43:14,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 04:43:14,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:14,271 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:14,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:43:14,271 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:14,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:14,271 INFO L82 PathProgramCache]: Analyzing trace with hash 951875836, now seen corresponding path program 22 times [2020-10-13 04:43:14,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:14,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372616140] [2020-10-13 04:43:14,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:14,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:14,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:17,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:19,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:19,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 04:43:19,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:43:19,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:43:19,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:19,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:43:19,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:19,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:43:19,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:19,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:19,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:19,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:19,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:19,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:19,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:19,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:19,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:19,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:19,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:19,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-13 04:43:19,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372616140] [2020-10-13 04:43:19,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:19,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:43:19,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85810513] [2020-10-13 04:43:19,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:43:19,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:19,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:43:19,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:43:19,486 INFO L87 Difference]: Start difference. First operand 120 states and 148 transitions. Second operand 18 states. [2020-10-13 04:43:19,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:19,657 INFO L93 Difference]: Finished difference Result 208 states and 264 transitions. [2020-10-13 04:43:19,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:43:19,658 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 73 [2020-10-13 04:43:19,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:19,659 INFO L225 Difference]: With dead ends: 208 [2020-10-13 04:43:19,659 INFO L226 Difference]: Without dead ends: 123 [2020-10-13 04:43:19,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:43:19,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-13 04:43:19,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2020-10-13 04:43:19,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 04:43:19,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 150 transitions. [2020-10-13 04:43:19,667 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 150 transitions. Word has length 73 [2020-10-13 04:43:19,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:19,668 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 150 transitions. [2020-10-13 04:43:19,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:43:19,668 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 150 transitions. [2020-10-13 04:43:19,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 04:43:19,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:19,669 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:19,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:43:19,669 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:19,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:19,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1256823462, now seen corresponding path program 23 times [2020-10-13 04:43:19,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:19,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942852010] [2020-10-13 04:43:19,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:19,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:19,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:20,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:24,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:24,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 04:43:24,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:43:24,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:43:24,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:24,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:43:24,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 04:43:24,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:43:24,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:24,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:24,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:24,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:24,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:24,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:24,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:24,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:24,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:24,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:24,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:24,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:24,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-13 04:43:24,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942852010] [2020-10-13 04:43:24,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:24,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:43:24,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102964415] [2020-10-13 04:43:24,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:43:24,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:24,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:43:24,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:43:24,811 INFO L87 Difference]: Start difference. First operand 122 states and 150 transitions. Second operand 14 states. [2020-10-13 04:43:25,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:25,177 INFO L93 Difference]: Finished difference Result 188 states and 244 transitions. [2020-10-13 04:43:25,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:43:25,177 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 75 [2020-10-13 04:43:25,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:25,179 INFO L225 Difference]: With dead ends: 188 [2020-10-13 04:43:25,179 INFO L226 Difference]: Without dead ends: 153 [2020-10-13 04:43:25,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:43:25,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-13 04:43:25,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 128. [2020-10-13 04:43:25,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 04:43:25,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 158 transitions. [2020-10-13 04:43:25,188 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 158 transitions. Word has length 75 [2020-10-13 04:43:25,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:25,189 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 158 transitions. [2020-10-13 04:43:25,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:43:25,189 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 158 transitions. [2020-10-13 04:43:25,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 04:43:25,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:25,190 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:25,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:43:25,190 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:25,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:25,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1721834463, now seen corresponding path program 24 times [2020-10-13 04:43:25,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:25,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622333023] [2020-10-13 04:43:25,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:25,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:25,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:29,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:30,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:30,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 04:43:30,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:43:30,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 04:43:30,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:30,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:43:30,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:30,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:43:30,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:30,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:30,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:30,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:30,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:30,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:30,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:30,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:30,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:30,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:30,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:30,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:30,410 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-13 04:43:30,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622333023] [2020-10-13 04:43:30,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:30,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:43:30,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139016863] [2020-10-13 04:43:30,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:43:30,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:30,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:43:30,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:43:30,413 INFO L87 Difference]: Start difference. First operand 128 states and 158 transitions. Second operand 19 states. [2020-10-13 04:43:30,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:30,589 INFO L93 Difference]: Finished difference Result 222 states and 282 transitions. [2020-10-13 04:43:30,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:43:30,589 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 78 [2020-10-13 04:43:30,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:30,590 INFO L225 Difference]: With dead ends: 222 [2020-10-13 04:43:30,590 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 04:43:30,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:43:30,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 04:43:30,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2020-10-13 04:43:30,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 04:43:30,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 160 transitions. [2020-10-13 04:43:30,603 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 160 transitions. Word has length 78 [2020-10-13 04:43:30,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:30,605 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 160 transitions. [2020-10-13 04:43:30,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:43:30,605 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 160 transitions. [2020-10-13 04:43:30,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 04:43:30,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:30,608 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:30,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:43:30,608 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:30,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:30,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1153434243, now seen corresponding path program 25 times [2020-10-13 04:43:30,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:30,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086520596] [2020-10-13 04:43:30,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:30,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:30,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:35,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:35,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:35,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 04:43:35,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:43:35,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:43:35,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:35,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:43:35,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 04:43:35,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 04:43:35,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:35,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:35,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:35,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:35,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:35,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:35,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:35,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:35,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:35,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:35,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:35,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:35,748 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2020-10-13 04:43:35,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086520596] [2020-10-13 04:43:35,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:35,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:43:35,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799242660] [2020-10-13 04:43:35,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:43:35,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:35,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:43:35,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:43:35,750 INFO L87 Difference]: Start difference. First operand 130 states and 160 transitions. Second operand 15 states. [2020-10-13 04:43:36,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:36,114 INFO L93 Difference]: Finished difference Result 196 states and 254 transitions. [2020-10-13 04:43:36,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:43:36,114 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 80 [2020-10-13 04:43:36,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:36,116 INFO L225 Difference]: With dead ends: 196 [2020-10-13 04:43:36,117 INFO L226 Difference]: Without dead ends: 161 [2020-10-13 04:43:36,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:43:36,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-13 04:43:36,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 136. [2020-10-13 04:43:36,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 04:43:36,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 168 transitions. [2020-10-13 04:43:36,130 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 168 transitions. Word has length 80 [2020-10-13 04:43:36,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:36,131 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 168 transitions. [2020-10-13 04:43:36,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:43:36,131 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 168 transitions. [2020-10-13 04:43:36,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 04:43:36,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:36,133 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:36,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:43:36,133 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:36,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:36,134 INFO L82 PathProgramCache]: Analyzing trace with hash -997799336, now seen corresponding path program 26 times [2020-10-13 04:43:36,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:36,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547323406] [2020-10-13 04:43:36,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:36,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:36,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:41,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:41,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 04:43:41,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:41,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:43:41,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:41,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:43:41,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:41,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:43:41,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:41,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:41,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:41,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:41,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:41,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:41,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:41,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:41,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:41,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:41,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:41,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-13 04:43:41,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547323406] [2020-10-13 04:43:41,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:41,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:43:41,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673432716] [2020-10-13 04:43:41,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:43:41,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:41,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:43:41,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:43:41,366 INFO L87 Difference]: Start difference. First operand 136 states and 168 transitions. Second operand 20 states. [2020-10-13 04:43:41,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:41,503 INFO L93 Difference]: Finished difference Result 236 states and 300 transitions. [2020-10-13 04:43:41,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:43:41,504 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 83 [2020-10-13 04:43:41,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:41,505 INFO L225 Difference]: With dead ends: 236 [2020-10-13 04:43:41,505 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 04:43:41,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:43:41,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 04:43:41,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2020-10-13 04:43:41,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-13 04:43:41,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 170 transitions. [2020-10-13 04:43:41,514 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 170 transitions. Word has length 83 [2020-10-13 04:43:41,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:41,514 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 170 transitions. [2020-10-13 04:43:41,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:43:41,515 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 170 transitions. [2020-10-13 04:43:41,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 04:43:41,516 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:41,516 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:41,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:43:41,516 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:41,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:41,517 INFO L82 PathProgramCache]: Analyzing trace with hash -429696714, now seen corresponding path program 27 times [2020-10-13 04:43:41,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:41,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893455119] [2020-10-13 04:43:41,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:41,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:41,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:41,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:46,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:46,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 04:43:46,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:46,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:43:46,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:46,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:43:46,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:46,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:43:46,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:46,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:46,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:46,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:46,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:46,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:46,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:46,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:46,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:46,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:46,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:46,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:46,766 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-13 04:43:46,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893455119] [2020-10-13 04:43:46,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:46,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:43:46,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915950953] [2020-10-13 04:43:46,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:43:46,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:46,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:43:46,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:43:46,768 INFO L87 Difference]: Start difference. First operand 138 states and 170 transitions. Second operand 21 states. [2020-10-13 04:43:46,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:46,913 INFO L93 Difference]: Finished difference Result 238 states and 302 transitions. [2020-10-13 04:43:46,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:43:46,913 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 85 [2020-10-13 04:43:46,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:46,914 INFO L225 Difference]: With dead ends: 238 [2020-10-13 04:43:46,915 INFO L226 Difference]: Without dead ends: 141 [2020-10-13 04:43:46,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:43:46,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-13 04:43:46,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2020-10-13 04:43:46,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 04:43:46,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 172 transitions. [2020-10-13 04:43:46,925 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 172 transitions. Word has length 85 [2020-10-13 04:43:46,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:46,926 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 172 transitions. [2020-10-13 04:43:46,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:43:46,926 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 172 transitions. [2020-10-13 04:43:46,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 04:43:46,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:46,927 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:46,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:43:46,927 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:46,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:46,928 INFO L82 PathProgramCache]: Analyzing trace with hash 56076436, now seen corresponding path program 28 times [2020-10-13 04:43:46,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:46,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922786805] [2020-10-13 04:43:46,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:46,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:46,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:46,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:48,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:51,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:51,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 04:43:51,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:43:51,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:43:51,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:51,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:43:51,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 04:43:51,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:43:51,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:52,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:52,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:52,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:52,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:52,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:52,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:52,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:52,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:52,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:52,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:52,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2020-10-13 04:43:52,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922786805] [2020-10-13 04:43:52,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:52,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:43:52,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879145718] [2020-10-13 04:43:52,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:43:52,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:52,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:43:52,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:43:52,101 INFO L87 Difference]: Start difference. First operand 140 states and 172 transitions. Second operand 16 states. [2020-10-13 04:43:52,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:52,426 INFO L93 Difference]: Finished difference Result 206 states and 266 transitions. [2020-10-13 04:43:52,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:43:52,427 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-10-13 04:43:52,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:52,429 INFO L225 Difference]: With dead ends: 206 [2020-10-13 04:43:52,429 INFO L226 Difference]: Without dead ends: 171 [2020-10-13 04:43:52,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:43:52,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-13 04:43:52,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 146. [2020-10-13 04:43:52,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-13 04:43:52,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 180 transitions. [2020-10-13 04:43:52,437 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 180 transitions. Word has length 87 [2020-10-13 04:43:52,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:52,438 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 180 transitions. [2020-10-13 04:43:52,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:43:52,438 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 180 transitions. [2020-10-13 04:43:52,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 04:43:52,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:52,440 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:52,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:43:52,441 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:52,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:52,441 INFO L82 PathProgramCache]: Analyzing trace with hash 906829479, now seen corresponding path program 29 times [2020-10-13 04:43:52,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:52,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437239115] [2020-10-13 04:43:52,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:52,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:52,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:57,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:57,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 04:43:57,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:57,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 04:43:57,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:57,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:43:57,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:57,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:43:57,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:57,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:57,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:57,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:57,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:57,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:57,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:57,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:57,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:57,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:57,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:57,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 04:43:57,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437239115] [2020-10-13 04:43:57,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:57,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:43:57,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479949297] [2020-10-13 04:43:57,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:43:57,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:57,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:43:57,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:43:57,740 INFO L87 Difference]: Start difference. First operand 146 states and 180 transitions. Second operand 22 states. [2020-10-13 04:43:57,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:57,965 INFO L93 Difference]: Finished difference Result 252 states and 320 transitions. [2020-10-13 04:43:57,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:43:57,966 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 90 [2020-10-13 04:43:57,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:57,968 INFO L225 Difference]: With dead ends: 252 [2020-10-13 04:43:57,968 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 04:43:57,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:43:57,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 04:43:57,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2020-10-13 04:43:57,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 04:43:57,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 182 transitions. [2020-10-13 04:43:57,977 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 182 transitions. Word has length 90 [2020-10-13 04:43:57,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:57,978 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 182 transitions. [2020-10-13 04:43:57,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:43:57,979 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 182 transitions. [2020-10-13 04:43:57,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 04:43:57,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:57,980 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:57,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:43:57,980 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:57,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:57,980 INFO L82 PathProgramCache]: Analyzing trace with hash -2133214711, now seen corresponding path program 30 times [2020-10-13 04:43:57,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:57,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590959603] [2020-10-13 04:43:57,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:57,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:58,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:58,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:03,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:03,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 04:44:03,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:03,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 04:44:03,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:03,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:44:03,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 04:44:03,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 04:44:03,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:03,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:03,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:03,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:03,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:03,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:03,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:03,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:03,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:03,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:03,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:03,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:03,182 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-13 04:44:03,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590959603] [2020-10-13 04:44:03,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:03,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:44:03,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753317780] [2020-10-13 04:44:03,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:44:03,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:03,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:44:03,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:44:03,184 INFO L87 Difference]: Start difference. First operand 148 states and 182 transitions. Second operand 17 states. [2020-10-13 04:44:03,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:03,642 INFO L93 Difference]: Finished difference Result 214 states and 276 transitions. [2020-10-13 04:44:03,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:44:03,642 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-10-13 04:44:03,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:03,644 INFO L225 Difference]: With dead ends: 214 [2020-10-13 04:44:03,644 INFO L226 Difference]: Without dead ends: 179 [2020-10-13 04:44:03,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:44:03,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-13 04:44:03,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 154. [2020-10-13 04:44:03,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-13 04:44:03,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 190 transitions. [2020-10-13 04:44:03,653 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 190 transitions. Word has length 92 [2020-10-13 04:44:03,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:03,654 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 190 transitions. [2020-10-13 04:44:03,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:44:03,654 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 190 transitions. [2020-10-13 04:44:03,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 04:44:03,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:03,655 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:03,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:44:03,655 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:03,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:03,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1187341038, now seen corresponding path program 31 times [2020-10-13 04:44:03,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:03,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26175312] [2020-10-13 04:44:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:03,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:03,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:03,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:08,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:08,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 04:44:08,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:08,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-13 04:44:08,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:08,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:44:08,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:08,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:44:08,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:08,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:08,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:08,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:08,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:08,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:08,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:08,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:08,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:08,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:08,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:08,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-13 04:44:08,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26175312] [2020-10-13 04:44:08,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:08,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:44:08,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578477857] [2020-10-13 04:44:08,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:44:08,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:08,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:44:08,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:44:08,995 INFO L87 Difference]: Start difference. First operand 154 states and 190 transitions. Second operand 23 states. [2020-10-13 04:44:09,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:09,204 INFO L93 Difference]: Finished difference Result 266 states and 338 transitions. [2020-10-13 04:44:09,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:44:09,204 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 95 [2020-10-13 04:44:09,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:09,205 INFO L225 Difference]: With dead ends: 266 [2020-10-13 04:44:09,205 INFO L226 Difference]: Without dead ends: 157 [2020-10-13 04:44:09,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:44:09,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-13 04:44:09,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-10-13 04:44:09,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-13 04:44:09,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 192 transitions. [2020-10-13 04:44:09,214 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 192 transitions. Word has length 95 [2020-10-13 04:44:09,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:09,214 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 192 transitions. [2020-10-13 04:44:09,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:44:09,214 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 192 transitions. [2020-10-13 04:44:09,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 04:44:09,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:09,215 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:09,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:44:09,216 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:09,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:09,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1951518448, now seen corresponding path program 32 times [2020-10-13 04:44:09,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:09,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753650201] [2020-10-13 04:44:09,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:09,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:09,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:14,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:14,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 04:44:14,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:14,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 04:44:14,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:14,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:44:14,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:14,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:44:14,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:14,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:14,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:14,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:14,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:14,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:14,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:14,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:14,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:14,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:14,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:14,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:14,555 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-13 04:44:14,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753650201] [2020-10-13 04:44:14,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:14,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:44:14,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074067603] [2020-10-13 04:44:14,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:44:14,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:14,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:44:14,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:44:14,557 INFO L87 Difference]: Start difference. First operand 156 states and 192 transitions. Second operand 24 states. [2020-10-13 04:44:14,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:14,763 INFO L93 Difference]: Finished difference Result 268 states and 340 transitions. [2020-10-13 04:44:14,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:44:14,764 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 97 [2020-10-13 04:44:14,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:14,765 INFO L225 Difference]: With dead ends: 268 [2020-10-13 04:44:14,766 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 04:44:14,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:44:14,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 04:44:14,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2020-10-13 04:44:14,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-13 04:44:14,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 194 transitions. [2020-10-13 04:44:14,774 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 194 transitions. Word has length 97 [2020-10-13 04:44:14,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:14,774 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 194 transitions. [2020-10-13 04:44:14,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:44:14,775 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 194 transitions. [2020-10-13 04:44:14,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 04:44:14,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:14,776 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:14,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:44:14,776 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:14,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:14,776 INFO L82 PathProgramCache]: Analyzing trace with hash -966524594, now seen corresponding path program 33 times [2020-10-13 04:44:14,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:14,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921658400] [2020-10-13 04:44:14,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:14,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:14,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:19,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:19,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 04:44:19,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:19,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:44:19,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:19,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:44:19,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 04:44:19,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:44:19,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:19,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:19,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:19,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:19,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:19,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:19,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:19,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:19,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:19,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:19,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:19,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:19,984 INFO L134 CoverageAnalysis]: Checked inductivity of 688 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2020-10-13 04:44:19,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921658400] [2020-10-13 04:44:19,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:19,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:44:19,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524845516] [2020-10-13 04:44:19,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:44:19,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:19,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:44:19,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:44:19,986 INFO L87 Difference]: Start difference. First operand 158 states and 194 transitions. Second operand 18 states. [2020-10-13 04:44:20,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:20,485 INFO L93 Difference]: Finished difference Result 224 states and 288 transitions. [2020-10-13 04:44:20,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:44:20,485 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 99 [2020-10-13 04:44:20,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:20,487 INFO L225 Difference]: With dead ends: 224 [2020-10-13 04:44:20,487 INFO L226 Difference]: Without dead ends: 189 [2020-10-13 04:44:20,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:44:20,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-13 04:44:20,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 164. [2020-10-13 04:44:20,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-13 04:44:20,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 202 transitions. [2020-10-13 04:44:20,504 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 202 transitions. Word has length 99 [2020-10-13 04:44:20,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:20,505 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 202 transitions. [2020-10-13 04:44:20,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:44:20,506 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 202 transitions. [2020-10-13 04:44:20,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 04:44:20,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:20,507 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:20,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:44:20,508 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:20,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:20,509 INFO L82 PathProgramCache]: Analyzing trace with hash 802575277, now seen corresponding path program 34 times [2020-10-13 04:44:20,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:20,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56831816] [2020-10-13 04:44:20,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:20,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:21,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:21,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:25,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:25,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 04:44:25,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:44:25,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:44:25,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:25,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:44:25,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:25,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:44:25,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:25,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:25,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:25,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:25,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:25,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:25,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:25,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:25,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:25,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:25,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:25,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-13 04:44:25,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56831816] [2020-10-13 04:44:25,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:25,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:44:25,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503193944] [2020-10-13 04:44:25,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:44:25,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:25,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:44:25,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:44:25,858 INFO L87 Difference]: Start difference. First operand 164 states and 202 transitions. Second operand 25 states. [2020-10-13 04:44:26,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:26,015 INFO L93 Difference]: Finished difference Result 282 states and 358 transitions. [2020-10-13 04:44:26,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:44:26,016 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 102 [2020-10-13 04:44:26,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:26,018 INFO L225 Difference]: With dead ends: 282 [2020-10-13 04:44:26,018 INFO L226 Difference]: Without dead ends: 167 [2020-10-13 04:44:26,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:44:26,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-13 04:44:26,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2020-10-13 04:44:26,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-13 04:44:26,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 204 transitions. [2020-10-13 04:44:26,026 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 204 transitions. Word has length 102 [2020-10-13 04:44:26,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:26,026 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 204 transitions. [2020-10-13 04:44:26,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:44:26,027 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 204 transitions. [2020-10-13 04:44:26,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 04:44:26,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:26,027 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:26,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:44:26,028 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:26,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:26,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1270541327, now seen corresponding path program 35 times [2020-10-13 04:44:26,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:26,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088456521] [2020-10-13 04:44:26,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:26,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:26,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:27,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:31,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:31,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-13 04:44:31,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:44:31,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 04:44:31,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:31,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:44:31,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 04:44:31,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 04:44:31,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:31,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:31,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:31,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:31,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:31,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:31,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:31,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:31,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:31,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:31,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:31,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:44:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 771 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2020-10-13 04:44:31,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088456521] [2020-10-13 04:44:31,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:31,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:44:31,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481080624] [2020-10-13 04:44:31,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:44:31,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:31,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:44:31,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:44:31,254 INFO L87 Difference]: Start difference. First operand 166 states and 204 transitions. Second operand 19 states. [2020-10-13 04:44:31,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:31,762 INFO L93 Difference]: Finished difference Result 232 states and 298 transitions. [2020-10-13 04:44:31,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:44:31,763 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2020-10-13 04:44:31,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:31,764 INFO L225 Difference]: With dead ends: 232 [2020-10-13 04:44:31,764 INFO L226 Difference]: Without dead ends: 197 [2020-10-13 04:44:31,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:44:31,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-13 04:44:31,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 172. [2020-10-13 04:44:31,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-13 04:44:31,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 212 transitions. [2020-10-13 04:44:31,775 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 212 transitions. Word has length 104 [2020-10-13 04:44:31,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:31,776 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 212 transitions. [2020-10-13 04:44:31,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:44:31,776 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 212 transitions. [2020-10-13 04:44:31,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 04:44:31,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:31,778 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:31,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:44:31,778 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:31,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:31,778 INFO L82 PathProgramCache]: Analyzing trace with hash 225895756, now seen corresponding path program 36 times [2020-10-13 04:44:31,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:31,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015465129] [2020-10-13 04:44:31,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:31,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:32,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:32,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:36,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:36,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 04:44:36,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:44:36,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 04:44:36,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:36,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:44:36,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:36,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 04:44:36,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:37,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:37,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:37,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:37,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:37,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:37,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:37,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:37,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:37,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:37,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:37,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:37,152 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-13 04:44:37,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015465129] [2020-10-13 04:44:37,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:37,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:44:37,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754408917] [2020-10-13 04:44:37,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:44:37,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:37,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:44:37,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:44:37,154 INFO L87 Difference]: Start difference. First operand 172 states and 212 transitions. Second operand 26 states. [2020-10-13 04:44:37,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:37,379 INFO L93 Difference]: Finished difference Result 296 states and 376 transitions. [2020-10-13 04:44:37,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:44:37,379 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 107 [2020-10-13 04:44:37,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:37,381 INFO L225 Difference]: With dead ends: 296 [2020-10-13 04:44:37,381 INFO L226 Difference]: Without dead ends: 175 [2020-10-13 04:44:37,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:44:37,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-13 04:44:37,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2020-10-13 04:44:37,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-13 04:44:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 214 transitions. [2020-10-13 04:44:37,389 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 214 transitions. Word has length 107 [2020-10-13 04:44:37,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:37,389 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 214 transitions. [2020-10-13 04:44:37,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:44:37,390 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 214 transitions. [2020-10-13 04:44:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-13 04:44:37,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:37,391 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:37,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:44:37,391 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:37,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:37,391 INFO L82 PathProgramCache]: Analyzing trace with hash -940819926, now seen corresponding path program 37 times [2020-10-13 04:44:37,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:37,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679716764] [2020-10-13 04:44:37,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:37,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:37,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:38,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:38,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:42,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:42,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-13 04:44:42,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:44:42,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 04:44:42,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:42,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:44:42,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:42,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 04:44:42,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:42,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:42,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:42,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:42,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:42,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:42,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:42,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:42,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:42,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:42,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:42,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-13 04:44:42,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679716764] [2020-10-13 04:44:42,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:42,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:44:42,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852313138] [2020-10-13 04:44:42,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:44:42,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:42,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:44:42,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:44:42,801 INFO L87 Difference]: Start difference. First operand 174 states and 214 transitions. Second operand 27 states. [2020-10-13 04:44:43,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:43,039 INFO L93 Difference]: Finished difference Result 298 states and 378 transitions. [2020-10-13 04:44:43,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:44:43,040 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 109 [2020-10-13 04:44:43,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:43,041 INFO L225 Difference]: With dead ends: 298 [2020-10-13 04:44:43,042 INFO L226 Difference]: Without dead ends: 177 [2020-10-13 04:44:43,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:44:43,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-13 04:44:43,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2020-10-13 04:44:43,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-13 04:44:43,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 216 transitions. [2020-10-13 04:44:43,050 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 216 transitions. Word has length 109 [2020-10-13 04:44:43,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:43,051 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 216 transitions. [2020-10-13 04:44:43,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:44:43,051 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 216 transitions. [2020-10-13 04:44:43,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 04:44:43,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:43,052 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:43,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 04:44:43,052 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:43,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:43,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1168126072, now seen corresponding path program 38 times [2020-10-13 04:44:43,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:43,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334645541] [2020-10-13 04:44:43,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:43,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:44,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:44,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:48,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:48,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 04:44:48,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:44:48,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 04:44:48,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:48,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:44:48,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 04:44:48,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 04:44:48,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:48,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:48,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:48,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:48,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:48,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:48,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:48,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:48,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:48,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:48,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:48,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2020-10-13 04:44:48,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334645541] [2020-10-13 04:44:48,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:48,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:44:48,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470161458] [2020-10-13 04:44:48,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:44:48,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:48,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:44:48,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:44:48,328 INFO L87 Difference]: Start difference. First operand 176 states and 216 transitions. Second operand 20 states. [2020-10-13 04:44:48,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:48,865 INFO L93 Difference]: Finished difference Result 242 states and 310 transitions. [2020-10-13 04:44:48,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:44:48,866 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 111 [2020-10-13 04:44:48,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:48,869 INFO L225 Difference]: With dead ends: 242 [2020-10-13 04:44:48,869 INFO L226 Difference]: Without dead ends: 207 [2020-10-13 04:44:48,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:44:48,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-13 04:44:48,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 182. [2020-10-13 04:44:48,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-13 04:44:48,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 224 transitions. [2020-10-13 04:44:48,882 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 224 transitions. Word has length 111 [2020-10-13 04:44:48,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:48,885 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 224 transitions. [2020-10-13 04:44:48,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:44:48,886 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 224 transitions. [2020-10-13 04:44:48,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-13 04:44:48,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:48,887 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:48,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 04:44:48,888 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:48,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:48,888 INFO L82 PathProgramCache]: Analyzing trace with hash -742776013, now seen corresponding path program 39 times [2020-10-13 04:44:48,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:48,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166178152] [2020-10-13 04:44:48,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:48,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:50,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:50,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:53,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:53,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-13 04:44:53,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:44:53,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-13 04:44:53,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:53,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:44:53,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:53,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 04:44:53,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:54,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:54,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:54,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:54,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:54,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:54,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:54,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:54,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:54,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:54,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:54,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:54,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:44:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 952 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-13 04:44:54,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166178152] [2020-10-13 04:44:54,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:54,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:44:54,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496489425] [2020-10-13 04:44:54,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:44:54,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:54,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:44:54,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:44:54,490 INFO L87 Difference]: Start difference. First operand 182 states and 224 transitions. Second operand 28 states. [2020-10-13 04:44:54,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:54,815 INFO L93 Difference]: Finished difference Result 312 states and 396 transitions. [2020-10-13 04:44:54,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:44:54,816 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 114 [2020-10-13 04:44:54,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:54,818 INFO L225 Difference]: With dead ends: 312 [2020-10-13 04:44:54,818 INFO L226 Difference]: Without dead ends: 185 [2020-10-13 04:44:54,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:44:54,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-13 04:44:54,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2020-10-13 04:44:54,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-13 04:44:54,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 226 transitions. [2020-10-13 04:44:54,833 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 226 transitions. Word has length 114 [2020-10-13 04:44:54,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:54,833 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 226 transitions. [2020-10-13 04:44:54,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:44:54,834 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 226 transitions. [2020-10-13 04:44:54,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 04:44:54,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:54,835 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:54,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 04:44:54,836 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:54,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:54,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1403205781, now seen corresponding path program 40 times [2020-10-13 04:44:54,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:54,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019623164] [2020-10-13 04:44:54,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:54,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:56,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:58,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:59,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:59,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 04:44:59,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:44:59,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 04:44:59,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:59,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:44:59,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-13 04:44:59,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 04:44:59,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:00,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:00,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:00,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:00,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:00,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:00,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:00,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:00,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:00,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:00,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:00,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-10-13 04:45:00,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019623164] [2020-10-13 04:45:00,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:00,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:45:00,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033959127] [2020-10-13 04:45:00,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:45:00,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:00,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:45:00,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:45:00,189 INFO L87 Difference]: Start difference. First operand 184 states and 226 transitions. Second operand 21 states. [2020-10-13 04:45:00,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:00,733 INFO L93 Difference]: Finished difference Result 250 states and 320 transitions. [2020-10-13 04:45:00,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:45:00,733 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 116 [2020-10-13 04:45:00,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:00,736 INFO L225 Difference]: With dead ends: 250 [2020-10-13 04:45:00,736 INFO L226 Difference]: Without dead ends: 215 [2020-10-13 04:45:00,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:45:00,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-13 04:45:00,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 190. [2020-10-13 04:45:00,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-13 04:45:00,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 234 transitions. [2020-10-13 04:45:00,748 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 234 transitions. Word has length 116 [2020-10-13 04:45:00,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:00,749 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 234 transitions. [2020-10-13 04:45:00,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:45:00,749 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 234 transitions. [2020-10-13 04:45:00,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 04:45:00,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:00,750 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:00,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 04:45:00,751 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:00,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:00,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1062732550, now seen corresponding path program 41 times [2020-10-13 04:45:00,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:00,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903897624] [2020-10-13 04:45:00,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:00,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:02,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:02,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:05,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:05,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 04:45:05,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:45:05,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-13 04:45:05,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:05,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 04:45:05,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:05,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 04:45:05,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:06,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:06,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:06,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:06,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:06,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:06,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:06,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:06,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:06,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:06,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:06,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:06,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-13 04:45:06,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903897624] [2020-10-13 04:45:06,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:06,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:45:06,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401335844] [2020-10-13 04:45:06,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:45:06,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:06,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:45:06,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:45:06,279 INFO L87 Difference]: Start difference. First operand 190 states and 234 transitions. Second operand 29 states. [2020-10-13 04:45:06,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:06,445 INFO L93 Difference]: Finished difference Result 326 states and 414 transitions. [2020-10-13 04:45:06,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:45:06,445 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 119 [2020-10-13 04:45:06,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:06,446 INFO L225 Difference]: With dead ends: 326 [2020-10-13 04:45:06,447 INFO L226 Difference]: Without dead ends: 193 [2020-10-13 04:45:06,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:45:06,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-13 04:45:06,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2020-10-13 04:45:06,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-13 04:45:06,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 236 transitions. [2020-10-13 04:45:06,456 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 236 transitions. Word has length 119 [2020-10-13 04:45:06,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:06,456 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 236 transitions. [2020-10-13 04:45:06,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:45:06,456 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 236 transitions. [2020-10-13 04:45:06,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-13 04:45:06,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:06,457 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:06,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 04:45:06,458 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:06,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:06,458 INFO L82 PathProgramCache]: Analyzing trace with hash -972096796, now seen corresponding path program 42 times [2020-10-13 04:45:06,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:06,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937152005] [2020-10-13 04:45:06,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:06,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:06,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:11,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:11,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 04:45:11,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:11,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-13 04:45:11,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:11,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:45:11,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-13 04:45:11,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 04:45:11,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:11,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:11,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:11,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:11,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:11,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:11,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:11,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:11,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:11,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:11,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:11,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2020-10-13 04:45:11,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937152005] [2020-10-13 04:45:11,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:11,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:45:11,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96033242] [2020-10-13 04:45:11,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:45:11,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:11,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:45:11,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:45:11,776 INFO L87 Difference]: Start difference. First operand 192 states and 236 transitions. Second operand 22 states. [2020-10-13 04:45:12,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:12,397 INFO L93 Difference]: Finished difference Result 258 states and 330 transitions. [2020-10-13 04:45:12,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:45:12,398 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 121 [2020-10-13 04:45:12,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:12,400 INFO L225 Difference]: With dead ends: 258 [2020-10-13 04:45:12,400 INFO L226 Difference]: Without dead ends: 223 [2020-10-13 04:45:12,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:45:12,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-13 04:45:12,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 198. [2020-10-13 04:45:12,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-13 04:45:12,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 244 transitions. [2020-10-13 04:45:12,409 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 244 transitions. Word has length 121 [2020-10-13 04:45:12,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:12,409 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 244 transitions. [2020-10-13 04:45:12,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:45:12,409 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 244 transitions. [2020-10-13 04:45:12,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-13 04:45:12,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:12,410 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:12,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 04:45:12,411 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:12,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:12,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1990137257, now seen corresponding path program 43 times [2020-10-13 04:45:12,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:12,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523073864] [2020-10-13 04:45:12,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:12,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:12,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:14,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:14,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:17,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:17,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-13 04:45:17,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:45:17,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 04:45:17,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:17,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:45:17,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:17,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 04:45:17,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:17,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:17,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:17,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:17,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:17,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:17,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:17,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:17,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:17,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:17,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:17,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1153 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-10-13 04:45:17,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523073864] [2020-10-13 04:45:17,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:17,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 04:45:17,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884930304] [2020-10-13 04:45:17,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 04:45:17,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:17,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 04:45:17,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:45:17,910 INFO L87 Difference]: Start difference. First operand 198 states and 244 transitions. Second operand 30 states. [2020-10-13 04:45:18,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:18,139 INFO L93 Difference]: Finished difference Result 340 states and 432 transitions. [2020-10-13 04:45:18,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 04:45:18,140 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 124 [2020-10-13 04:45:18,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:18,141 INFO L225 Difference]: With dead ends: 340 [2020-10-13 04:45:18,142 INFO L226 Difference]: Without dead ends: 201 [2020-10-13 04:45:18,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:45:18,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-13 04:45:18,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2020-10-13 04:45:18,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-13 04:45:18,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 246 transitions. [2020-10-13 04:45:18,156 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 246 transitions. Word has length 124 [2020-10-13 04:45:18,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:18,157 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 246 transitions. [2020-10-13 04:45:18,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 04:45:18,157 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 246 transitions. [2020-10-13 04:45:18,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 04:45:18,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:18,159 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:18,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 04:45:18,159 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:18,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:18,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1136644807, now seen corresponding path program 44 times [2020-10-13 04:45:18,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:18,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808066726] [2020-10-13 04:45:18,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:18,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:19,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:21,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:23,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:23,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 04:45:23,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:45:23,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:45:23,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:23,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 04:45:23,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:23,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 04:45:23,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:23,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:23,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:23,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:23,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:23,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:23,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:23,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:23,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:23,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:23,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:23,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:23,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1206 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-10-13 04:45:23,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808066726] [2020-10-13 04:45:23,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:23,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:45:23,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431602771] [2020-10-13 04:45:23,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:45:23,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:23,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:45:23,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:45:23,708 INFO L87 Difference]: Start difference. First operand 200 states and 246 transitions. Second operand 31 states. [2020-10-13 04:45:23,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:23,940 INFO L93 Difference]: Finished difference Result 342 states and 434 transitions. [2020-10-13 04:45:23,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:45:23,940 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 126 [2020-10-13 04:45:23,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:23,942 INFO L225 Difference]: With dead ends: 342 [2020-10-13 04:45:23,942 INFO L226 Difference]: Without dead ends: 203 [2020-10-13 04:45:23,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:45:23,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-13 04:45:23,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2020-10-13 04:45:23,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-13 04:45:23,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 248 transitions. [2020-10-13 04:45:23,952 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 248 transitions. Word has length 126 [2020-10-13 04:45:23,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:23,953 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 248 transitions. [2020-10-13 04:45:23,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:45:23,953 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 248 transitions. [2020-10-13 04:45:23,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-13 04:45:23,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:23,954 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:23,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 04:45:23,954 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:23,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:23,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1269153893, now seen corresponding path program 45 times [2020-10-13 04:45:23,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:23,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16622631] [2020-10-13 04:45:23,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:23,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:25,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:26,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:29,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:29,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-13 04:45:29,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:45:29,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-13 04:45:29,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:29,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:45:29,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-13 04:45:29,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 04:45:29,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:29,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:29,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:29,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:29,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:29,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:29,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:29,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:29,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:29,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:29,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:29,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:29,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-10-13 04:45:29,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16622631] [2020-10-13 04:45:29,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:29,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:45:29,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061386874] [2020-10-13 04:45:29,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:45:29,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:29,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:45:29,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:45:29,326 INFO L87 Difference]: Start difference. First operand 202 states and 248 transitions. Second operand 23 states. [2020-10-13 04:45:29,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:29,887 INFO L93 Difference]: Finished difference Result 268 states and 342 transitions. [2020-10-13 04:45:29,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:45:29,888 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 128 [2020-10-13 04:45:29,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:29,891 INFO L225 Difference]: With dead ends: 268 [2020-10-13 04:45:29,891 INFO L226 Difference]: Without dead ends: 233 [2020-10-13 04:45:29,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:45:29,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-13 04:45:29,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 208. [2020-10-13 04:45:29,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-13 04:45:29,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 256 transitions. [2020-10-13 04:45:29,900 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 256 transitions. Word has length 128 [2020-10-13 04:45:29,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:29,900 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 256 transitions. [2020-10-13 04:45:29,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:45:29,901 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 256 transitions. [2020-10-13 04:45:29,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 04:45:29,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:29,901 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:29,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 04:45:29,902 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:29,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:29,902 INFO L82 PathProgramCache]: Analyzing trace with hash 309483072, now seen corresponding path program 46 times [2020-10-13 04:45:29,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:29,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785117176] [2020-10-13 04:45:29,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:29,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:31,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:32,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:34,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:34,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 04:45:34,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:45:34,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-13 04:45:34,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:34,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 04:45:34,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:34,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 04:45:34,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:35,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:35,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:35,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:35,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:35,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:35,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:35,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:35,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:35,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:35,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:35,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:35,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1316 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-10-13 04:45:35,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785117176] [2020-10-13 04:45:35,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:35,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 04:45:35,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114559790] [2020-10-13 04:45:35,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 04:45:35,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:35,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 04:45:35,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:45:35,505 INFO L87 Difference]: Start difference. First operand 208 states and 256 transitions. Second operand 32 states. [2020-10-13 04:45:35,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:35,778 INFO L93 Difference]: Finished difference Result 356 states and 452 transitions. [2020-10-13 04:45:35,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 04:45:35,778 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 131 [2020-10-13 04:45:35,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:35,780 INFO L225 Difference]: With dead ends: 356 [2020-10-13 04:45:35,780 INFO L226 Difference]: Without dead ends: 211 [2020-10-13 04:45:35,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:45:35,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-13 04:45:35,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2020-10-13 04:45:35,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-13 04:45:35,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 258 transitions. [2020-10-13 04:45:35,788 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 258 transitions. Word has length 131 [2020-10-13 04:45:35,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:35,789 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 258 transitions. [2020-10-13 04:45:35,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 04:45:35,789 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 258 transitions. [2020-10-13 04:45:35,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-13 04:45:35,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:35,790 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:35,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-13 04:45:35,790 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:35,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:35,791 INFO L82 PathProgramCache]: Analyzing trace with hash 2030989598, now seen corresponding path program 47 times [2020-10-13 04:45:35,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:35,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651841071] [2020-10-13 04:45:35,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:35,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:37,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:38,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:40,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:40,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-13 04:45:40,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:45:40,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-13 04:45:40,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:40,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:45:40,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-13 04:45:40,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 04:45:40,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:41,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:41,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:41,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:41,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:41,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:41,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:41,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:41,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:41,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:41,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:41,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2020-10-13 04:45:41,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651841071] [2020-10-13 04:45:41,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:41,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:45:41,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245735990] [2020-10-13 04:45:41,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:45:41,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:41,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:45:41,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:45:41,158 INFO L87 Difference]: Start difference. First operand 210 states and 258 transitions. Second operand 24 states. [2020-10-13 04:45:41,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:41,832 INFO L93 Difference]: Finished difference Result 276 states and 352 transitions. [2020-10-13 04:45:41,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:45:41,833 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 133 [2020-10-13 04:45:41,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:41,835 INFO L225 Difference]: With dead ends: 276 [2020-10-13 04:45:41,835 INFO L226 Difference]: Without dead ends: 241 [2020-10-13 04:45:41,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 04:45:41,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-13 04:45:41,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 216. [2020-10-13 04:45:41,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-13 04:45:41,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 266 transitions. [2020-10-13 04:45:41,844 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 266 transitions. Word has length 133 [2020-10-13 04:45:41,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:41,844 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 266 transitions. [2020-10-13 04:45:41,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:45:41,845 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 266 transitions. [2020-10-13 04:45:41,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 04:45:41,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:41,846 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:41,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-13 04:45:41,846 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:41,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:41,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1212149283, now seen corresponding path program 48 times [2020-10-13 04:45:41,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:41,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088410749] [2020-10-13 04:45:41,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:41,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:41,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:41,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:46,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:46,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 04:45:46,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:46,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-13 04:45:46,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:46,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:45:46,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:46,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 04:45:46,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:47,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:47,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:47,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:47,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:47,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:47,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:47,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:47,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:47,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:47,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:47,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-13 04:45:47,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088410749] [2020-10-13 04:45:47,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:47,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:45:47,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788810239] [2020-10-13 04:45:47,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:45:47,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:47,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:45:47,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:45:47,498 INFO L87 Difference]: Start difference. First operand 216 states and 266 transitions. Second operand 33 states. [2020-10-13 04:45:47,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:47,693 INFO L93 Difference]: Finished difference Result 370 states and 470 transitions. [2020-10-13 04:45:47,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 04:45:47,694 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 136 [2020-10-13 04:45:47,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:47,695 INFO L225 Difference]: With dead ends: 370 [2020-10-13 04:45:47,696 INFO L226 Difference]: Without dead ends: 219 [2020-10-13 04:45:47,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:45:47,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-13 04:45:47,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2020-10-13 04:45:47,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-13 04:45:47,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 268 transitions. [2020-10-13 04:45:47,704 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 268 transitions. Word has length 136 [2020-10-13 04:45:47,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:47,705 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 268 transitions. [2020-10-13 04:45:47,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:45:47,705 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 268 transitions. [2020-10-13 04:45:47,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-13 04:45:47,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:47,706 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:47,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-13 04:45:47,706 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:47,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:47,707 INFO L82 PathProgramCache]: Analyzing trace with hash -344452673, now seen corresponding path program 49 times [2020-10-13 04:45:47,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:47,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274339131] [2020-10-13 04:45:47,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:47,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:49,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:50,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:52,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:52,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-13 04:45:52,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:45:52,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:45:52,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:52,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 04:45:52,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:52,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 04:45:52,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:53,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:53,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:53,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:53,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:53,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:53,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:53,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:53,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:53,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:53,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:53,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:53,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1490 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-13 04:45:53,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274339131] [2020-10-13 04:45:53,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:53,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 04:45:53,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668066487] [2020-10-13 04:45:53,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 04:45:53,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:53,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 04:45:53,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:45:53,330 INFO L87 Difference]: Start difference. First operand 218 states and 268 transitions. Second operand 34 states. [2020-10-13 04:45:53,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:53,594 INFO L93 Difference]: Finished difference Result 372 states and 472 transitions. [2020-10-13 04:45:53,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 04:45:53,595 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 138 [2020-10-13 04:45:53,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:53,597 INFO L225 Difference]: With dead ends: 372 [2020-10-13 04:45:53,597 INFO L226 Difference]: Without dead ends: 221 [2020-10-13 04:45:53,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:45:53,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-13 04:45:53,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2020-10-13 04:45:53,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-13 04:45:53,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 270 transitions. [2020-10-13 04:45:53,606 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 270 transitions. Word has length 138 [2020-10-13 04:45:53,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:53,607 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 270 transitions. [2020-10-13 04:45:53,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 04:45:53,607 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 270 transitions. [2020-10-13 04:45:53,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-13 04:45:53,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:53,608 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:53,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-13 04:45:53,608 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:53,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:53,609 INFO L82 PathProgramCache]: Analyzing trace with hash 288334113, now seen corresponding path program 50 times [2020-10-13 04:45:53,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:53,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245994008] [2020-10-13 04:45:53,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:53,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:53,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:58,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:58,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-13 04:45:58,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:58,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:45:58,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:58,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 04:45:58,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:58,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 04:45:58,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:59,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:59,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:59,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:59,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:59,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:59,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:59,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:59,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:59,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:59,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:59,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:59,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1551 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-13 04:45:59,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245994008] [2020-10-13 04:45:59,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:59,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 04:45:59,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632340063] [2020-10-13 04:45:59,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 04:45:59,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:59,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 04:45:59,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:45:59,242 INFO L87 Difference]: Start difference. First operand 220 states and 270 transitions. Second operand 35 states. [2020-10-13 04:45:59,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:59,525 INFO L93 Difference]: Finished difference Result 374 states and 474 transitions. [2020-10-13 04:45:59,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 04:45:59,526 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 140 [2020-10-13 04:45:59,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:59,528 INFO L225 Difference]: With dead ends: 374 [2020-10-13 04:45:59,528 INFO L226 Difference]: Without dead ends: 223 [2020-10-13 04:45:59,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:45:59,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-13 04:45:59,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 222. [2020-10-13 04:45:59,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-13 04:45:59,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 272 transitions. [2020-10-13 04:45:59,537 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 272 transitions. Word has length 140 [2020-10-13 04:45:59,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:59,537 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 272 transitions. [2020-10-13 04:45:59,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 04:45:59,537 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 272 transitions. [2020-10-13 04:45:59,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-13 04:45:59,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:59,538 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:59,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-13 04:45:59,539 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:59,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:59,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1488920573, now seen corresponding path program 51 times [2020-10-13 04:45:59,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:59,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107575848] [2020-10-13 04:45:59,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:59,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:02,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:02,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:04,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:04,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-13 04:46:04,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:46:04,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5067 [2020-10-13 04:46:04,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:04,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:46:04,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-13 04:46:04,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 04:46:04,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:04,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:04,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:04,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:04,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:04,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:04,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:04,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:04,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:04,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:04,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:04,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1614 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 1024 trivial. 0 not checked. [2020-10-13 04:46:04,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107575848] [2020-10-13 04:46:04,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:04,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:46:04,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239428584] [2020-10-13 04:46:04,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:46:04,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:04,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:46:04,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:46:04,964 INFO L87 Difference]: Start difference. First operand 222 states and 272 transitions. Second operand 25 states. [2020-10-13 04:46:05,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:05,630 INFO L93 Difference]: Finished difference Result 288 states and 366 transitions. [2020-10-13 04:46:05,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:46:05,631 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 142 [2020-10-13 04:46:05,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:05,633 INFO L225 Difference]: With dead ends: 288 [2020-10-13 04:46:05,633 INFO L226 Difference]: Without dead ends: 253 [2020-10-13 04:46:05,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 04:46:05,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-13 04:46:05,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 228. [2020-10-13 04:46:05,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-13 04:46:05,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 280 transitions. [2020-10-13 04:46:05,643 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 280 transitions. Word has length 142 [2020-10-13 04:46:05,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:05,643 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 280 transitions. [2020-10-13 04:46:05,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:46:05,644 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 280 transitions. [2020-10-13 04:46:05,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-13 04:46:05,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:05,645 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:05,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-13 04:46:05,645 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:05,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:05,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1229521704, now seen corresponding path program 52 times [2020-10-13 04:46:05,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:05,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472709864] [2020-10-13 04:46:05,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:05,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:05,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking...