/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/Mono4_1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:14:40,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:14:40,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:14:40,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:14:40,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:14:40,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:14:40,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:14:40,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:14:40,870 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:14:40,872 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:14:40,873 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:14:40,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:14:40,875 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:14:40,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:14:40,881 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:14:40,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:14:40,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:14:40,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:14:40,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:14:40,893 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:14:40,894 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:14:40,895 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:14:40,896 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:14:40,897 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:14:40,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:14:40,910 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:14:40,910 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:14:40,911 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:14:40,912 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:14:40,913 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:14:40,913 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:14:40,914 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:14:40,915 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:14:40,916 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:14:40,917 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:14:40,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:14:40,918 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:14:40,918 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:14:40,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:14:40,919 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:14:40,921 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:14:40,922 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 16:14:40,963 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:14:40,963 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:14:40,966 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:14:40,966 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:14:40,966 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:14:40,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:14:40,967 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:14:40,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:14:40,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:14:40,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:14:40,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:14:40,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:14:40,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:14:40,969 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:14:40,970 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:14:40,970 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:14:40,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:14:40,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:14:40,970 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:14:40,970 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:14:40,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:14:40,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:14:40,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:14:40,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:14:40,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:14:40,972 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:14:40,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:14:40,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:14:40,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:14:40,972 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:14:41,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:14:41,296 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:14:41,299 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:14:41,300 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:14:41,301 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:14:41,301 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono4_1.c [2020-10-12 16:14:41,368 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd638e016/6323f3418d6a4be19e4f565c03240103/FLAGc7c40f626 [2020-10-12 16:14:41,827 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:14:41,828 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/Mono4_1.c [2020-10-12 16:14:41,834 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd638e016/6323f3418d6a4be19e4f565c03240103/FLAGc7c40f626 [2020-10-12 16:14:42,216 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dd638e016/6323f3418d6a4be19e4f565c03240103 [2020-10-12 16:14:42,227 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:14:42,229 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:14:42,230 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:14:42,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:14:42,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:14:42,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:14:42" (1/1) ... [2020-10-12 16:14:42,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a2c32e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:42, skipping insertion in model container [2020-10-12 16:14:42,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:14:42" (1/1) ... [2020-10-12 16:14:42,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:14:42,264 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:14:42,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:14:42,438 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:14:42,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:14:42,470 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:14:42,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:42 WrapperNode [2020-10-12 16:14:42,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:14:42,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:14:42,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:14:42,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:14:42,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:42" (1/1) ... [2020-10-12 16:14:42,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:42" (1/1) ... [2020-10-12 16:14:42,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:42" (1/1) ... [2020-10-12 16:14:42,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:42" (1/1) ... [2020-10-12 16:14:42,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:42" (1/1) ... [2020-10-12 16:14:42,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:42" (1/1) ... [2020-10-12 16:14:42,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:42" (1/1) ... [2020-10-12 16:14:42,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:14:42,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:14:42,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:14:42,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:14:42,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:14:42,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:14:42,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:14:42,674 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:14:42,674 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:14:42,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:14:42,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:14:42,675 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:14:42,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:14:42,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:14:42,882 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:14:42,883 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 16:14:42,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:14:42 BoogieIcfgContainer [2020-10-12 16:14:42,887 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:14:42,888 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:14:42,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:14:42,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:14:42,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:14:42" (1/3) ... [2020-10-12 16:14:42,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@406d6f0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:14:42, skipping insertion in model container [2020-10-12 16:14:42,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:14:42" (2/3) ... [2020-10-12 16:14:42,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@406d6f0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:14:42, skipping insertion in model container [2020-10-12 16:14:42,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:14:42" (3/3) ... [2020-10-12 16:14:42,895 INFO L109 eAbstractionObserver]: Analyzing ICFG Mono4_1.c [2020-10-12 16:14:42,906 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:14:42,914 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:14:42,929 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:14:42,950 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:14:42,950 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:14:42,950 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:14:42,950 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:14:42,950 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:14:42,951 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:14:42,951 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:14:42,951 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:14:42,967 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-12 16:14:42,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-12 16:14:42,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:42,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:42,975 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:42,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:42,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1712329921, now seen corresponding path program 1 times [2020-10-12 16:14:42,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:42,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455852078] [2020-10-12 16:14:42,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:43,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:43,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:43,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:43,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 16:14:43,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:14:43,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-12 16:14:43,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:43,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:14:43,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:43,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:14:43,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:14:43,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:43,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:43,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:43,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:43,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:43,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:14:43,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:43,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:43,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:43,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:43,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-12 16:14:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:43,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455852078] [2020-10-12 16:14:43,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:14:43,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 16:14:43,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663118362] [2020-10-12 16:14:43,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:14:43,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:43,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:14:43,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:14:43,351 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 5 states. [2020-10-12 16:14:43,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:43,466 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2020-10-12 16:14:43,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:14:43,469 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-12 16:14:43,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:43,478 INFO L225 Difference]: With dead ends: 41 [2020-10-12 16:14:43,478 INFO L226 Difference]: Without dead ends: 14 [2020-10-12 16:14:43,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:14:43,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-12 16:14:43,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-12 16:14:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-12 16:14:43,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-10-12 16:14:43,524 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2020-10-12 16:14:43,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:43,524 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-10-12 16:14:43,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:14:43,525 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-10-12 16:14:43,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-12 16:14:43,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:43,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:43,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:14:43,526 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:43,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:43,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1337256884, now seen corresponding path program 1 times [2020-10-12 16:14:43,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:43,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824519807] [2020-10-12 16:14:43,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:43,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:43,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:43,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:43,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:43,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 16:14:43,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:43,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-12 16:14:43,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:43,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:14:43,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:43,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 16:14:43,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:14:43,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:43,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:43,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:43,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:43,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:43,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:14:43,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:43,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:43,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:43,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:43,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:14:43,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:14:43,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824519807] [2020-10-12 16:14:43,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:14:43,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 16:14:43,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812402453] [2020-10-12 16:14:43,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:14:43,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:43,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:14:43,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:14:43,874 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2020-10-12 16:14:43,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:43,964 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2020-10-12 16:14:43,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:14:43,964 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-12 16:14:43,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:43,967 INFO L225 Difference]: With dead ends: 23 [2020-10-12 16:14:43,968 INFO L226 Difference]: Without dead ends: 18 [2020-10-12 16:14:43,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:14:43,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-12 16:14:43,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-12 16:14:43,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-12 16:14:43,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-10-12 16:14:43,975 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2020-10-12 16:14:43,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:43,976 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-10-12 16:14:43,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:14:43,976 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-10-12 16:14:43,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 16:14:43,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:43,977 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:43,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:14:43,977 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:43,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:43,978 INFO L82 PathProgramCache]: Analyzing trace with hash 2011681711, now seen corresponding path program 1 times [2020-10-12 16:14:43,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:43,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320973283] [2020-10-12 16:14:43,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:43,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:44,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:44,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:44,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:44,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 16:14:44,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:44,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-12 16:14:44,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:44,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:14:44,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:44,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:14:44,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:14:44,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:44,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:44,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:44,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:44,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:44,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:14:44,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:44,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:44,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:44,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:44,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:14:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:14:44,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320973283] [2020-10-12 16:14:44,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:44,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:14:44,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654055661] [2020-10-12 16:14:44,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:14:44,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:44,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:14:44,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:14:44,138 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 7 states. [2020-10-12 16:14:44,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:44,197 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2020-10-12 16:14:44,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:14:44,198 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-12 16:14:44,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:44,199 INFO L225 Difference]: With dead ends: 27 [2020-10-12 16:14:44,199 INFO L226 Difference]: Without dead ends: 22 [2020-10-12 16:14:44,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:14:44,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-12 16:14:44,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-12 16:14:44,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-12 16:14:44,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2020-10-12 16:14:44,207 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 14 [2020-10-12 16:14:44,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:44,222 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2020-10-12 16:14:44,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:14:44,222 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2020-10-12 16:14:44,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:14:44,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:44,223 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:44,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:14:44,224 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:44,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:44,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1593878762, now seen corresponding path program 2 times [2020-10-12 16:14:44,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:44,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636110189] [2020-10-12 16:14:44,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:44,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:44,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:44,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:44,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:44,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:14:44,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:44,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-12 16:14:44,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:44,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:14:44,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:44,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:14:44,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:44,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:44,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:44,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:44,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:44,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:44,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:44,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:44,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:44,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:44,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:44,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:14:44,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636110189] [2020-10-12 16:14:44,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:44,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:14:44,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384228818] [2020-10-12 16:14:44,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:14:44,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:44,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:14:44,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:14:44,442 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 8 states. [2020-10-12 16:14:44,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:44,494 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2020-10-12 16:14:44,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:14:44,494 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-12 16:14:44,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:44,495 INFO L225 Difference]: With dead ends: 31 [2020-10-12 16:14:44,495 INFO L226 Difference]: Without dead ends: 26 [2020-10-12 16:14:44,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:14:44,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-12 16:14:44,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-12 16:14:44,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-12 16:14:44,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-10-12 16:14:44,502 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 16 [2020-10-12 16:14:44,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:44,503 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-10-12 16:14:44,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:14:44,503 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-10-12 16:14:44,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 16:14:44,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:44,504 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:44,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:14:44,505 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:44,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:44,505 INFO L82 PathProgramCache]: Analyzing trace with hash -482796699, now seen corresponding path program 3 times [2020-10-12 16:14:44,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:44,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795396515] [2020-10-12 16:14:44,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:44,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:44,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:44,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:44,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:44,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:44,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:14:44,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:44,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-12 16:14:44,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:44,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:14:44,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:44,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:14:44,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:44,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:44,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:44,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:44,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:44,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:44,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:44,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:44,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:44,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:44,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:44,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:44,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:44,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:14:44,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795396515] [2020-10-12 16:14:44,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:44,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:14:44,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345137816] [2020-10-12 16:14:44,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:14:44,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:44,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:14:44,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:14:44,681 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-10-12 16:14:44,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:44,735 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-10-12 16:14:44,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:14:44,736 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-12 16:14:44,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:44,737 INFO L225 Difference]: With dead ends: 35 [2020-10-12 16:14:44,737 INFO L226 Difference]: Without dead ends: 30 [2020-10-12 16:14:44,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:14:44,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-12 16:14:44,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-12 16:14:44,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 16:14:44,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2020-10-12 16:14:44,745 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 18 [2020-10-12 16:14:44,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:44,746 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2020-10-12 16:14:44,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:14:44,746 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2020-10-12 16:14:44,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 16:14:44,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:44,747 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:44,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:14:44,747 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:44,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:44,748 INFO L82 PathProgramCache]: Analyzing trace with hash 991877920, now seen corresponding path program 4 times [2020-10-12 16:14:44,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:44,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031737275] [2020-10-12 16:14:44,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:44,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:44,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:44,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:44,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:44,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:14:44,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:44,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-12 16:14:44,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:44,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:14:44,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:44,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:14:44,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:44,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:44,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:44,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:44,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:44,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:44,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:44,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:44,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:44,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:44,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:44,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-12 16:14:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:14:45,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031737275] [2020-10-12 16:14:45,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:45,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:14:45,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786590365] [2020-10-12 16:14:45,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:14:45,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:45,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:14:45,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:14:45,004 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand 10 states. [2020-10-12 16:14:45,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:45,167 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2020-10-12 16:14:45,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:14:45,168 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-12 16:14:45,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:45,169 INFO L225 Difference]: With dead ends: 39 [2020-10-12 16:14:45,169 INFO L226 Difference]: Without dead ends: 34 [2020-10-12 16:14:45,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:14:45,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-12 16:14:45,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-12 16:14:45,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-12 16:14:45,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2020-10-12 16:14:45,182 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 20 [2020-10-12 16:14:45,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:45,182 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2020-10-12 16:14:45,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:14:45,183 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2020-10-12 16:14:45,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:14:45,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:45,184 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:45,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:14:45,184 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:45,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:45,185 INFO L82 PathProgramCache]: Analyzing trace with hash 814979099, now seen corresponding path program 5 times [2020-10-12 16:14:45,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:45,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307951917] [2020-10-12 16:14:45,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:45,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:45,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:45,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:45,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:45,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:14:45,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:45,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-12 16:14:45,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:45,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:14:45,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:45,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:14:45,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:45,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:45,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:45,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:45,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:45,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:45,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:45,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:14:45,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:45,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:45,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:45,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:45,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:45,402 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:14:45,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307951917] [2020-10-12 16:14:45,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:45,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:14:45,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933287352] [2020-10-12 16:14:45,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:14:45,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:45,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:14:45,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:14:45,405 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand 11 states. [2020-10-12 16:14:45,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:45,470 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2020-10-12 16:14:45,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:14:45,471 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-12 16:14:45,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:45,472 INFO L225 Difference]: With dead ends: 43 [2020-10-12 16:14:45,472 INFO L226 Difference]: Without dead ends: 38 [2020-10-12 16:14:45,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:14:45,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-12 16:14:45,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-12 16:14:45,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 16:14:45,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 52 transitions. [2020-10-12 16:14:45,484 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 52 transitions. Word has length 22 [2020-10-12 16:14:45,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:45,484 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 52 transitions. [2020-10-12 16:14:45,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:14:45,484 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 52 transitions. [2020-10-12 16:14:45,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:14:45,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:45,494 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:45,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:14:45,494 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:45,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:45,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1681063338, now seen corresponding path program 6 times [2020-10-12 16:14:45,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:45,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127790565] [2020-10-12 16:14:45,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:45,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:45,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:45,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:45,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:45,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:14:45,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:45,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-12 16:14:45,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:45,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:14:45,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:45,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:14:45,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:45,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:45,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:45,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:45,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:45,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:45,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:45,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:45,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:45,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:45,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:45,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:45,783 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:14:45,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127790565] [2020-10-12 16:14:45,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:45,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:14:45,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181155859] [2020-10-12 16:14:45,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:14:45,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:45,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:14:45,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:14:45,786 INFO L87 Difference]: Start difference. First operand 38 states and 52 transitions. Second operand 12 states. [2020-10-12 16:14:45,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:45,963 INFO L93 Difference]: Finished difference Result 47 states and 63 transitions. [2020-10-12 16:14:45,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:14:45,964 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-10-12 16:14:45,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:45,965 INFO L225 Difference]: With dead ends: 47 [2020-10-12 16:14:45,965 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 16:14:45,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:14:45,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 16:14:45,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-12 16:14:45,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 16:14:45,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 58 transitions. [2020-10-12 16:14:45,973 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 58 transitions. Word has length 24 [2020-10-12 16:14:45,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:45,974 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 58 transitions. [2020-10-12 16:14:45,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:14:45,974 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 58 transitions. [2020-10-12 16:14:45,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:14:45,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:45,975 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:45,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:14:45,975 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:45,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:45,976 INFO L82 PathProgramCache]: Analyzing trace with hash 508873169, now seen corresponding path program 7 times [2020-10-12 16:14:45,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:45,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554209919] [2020-10-12 16:14:45,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:45,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:45,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:46,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:46,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:46,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:46,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:14:46,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:46,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-12 16:14:46,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:46,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:14:46,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:46,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:14:46,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:46,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:46,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:46,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:46,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:46,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:46,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:46,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:46,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:46,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:46,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:46,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:46,297 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:14:46,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554209919] [2020-10-12 16:14:46,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:46,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:14:46,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125646770] [2020-10-12 16:14:46,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:14:46,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:46,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:14:46,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:14:46,306 INFO L87 Difference]: Start difference. First operand 42 states and 58 transitions. Second operand 13 states. [2020-10-12 16:14:46,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:46,383 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2020-10-12 16:14:46,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:14:46,383 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-10-12 16:14:46,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:46,385 INFO L225 Difference]: With dead ends: 51 [2020-10-12 16:14:46,385 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 16:14:46,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:14:46,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 16:14:46,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-12 16:14:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 16:14:46,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 64 transitions. [2020-10-12 16:14:46,402 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 64 transitions. Word has length 26 [2020-10-12 16:14:46,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:46,402 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 64 transitions. [2020-10-12 16:14:46,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:14:46,402 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 64 transitions. [2020-10-12 16:14:46,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:14:46,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:46,403 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:46,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:14:46,404 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:46,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:46,406 INFO L82 PathProgramCache]: Analyzing trace with hash 503881356, now seen corresponding path program 8 times [2020-10-12 16:14:46,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:46,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254361055] [2020-10-12 16:14:46,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:46,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:46,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:46,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:46,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:46,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:14:46,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:46,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-12 16:14:46,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:46,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:14:46,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:46,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:14:46,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:46,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:46,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:46,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:46,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:46,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:46,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:46,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:46,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:46,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:46,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:46,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:46,737 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:14:46,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254361055] [2020-10-12 16:14:46,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:46,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:14:46,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682164136] [2020-10-12 16:14:46,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:14:46,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:46,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:14:46,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:14:46,740 INFO L87 Difference]: Start difference. First operand 46 states and 64 transitions. Second operand 14 states. [2020-10-12 16:14:46,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:46,805 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2020-10-12 16:14:46,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:14:46,806 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-10-12 16:14:46,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:46,807 INFO L225 Difference]: With dead ends: 55 [2020-10-12 16:14:46,807 INFO L226 Difference]: Without dead ends: 50 [2020-10-12 16:14:46,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:14:46,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-12 16:14:46,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-12 16:14:46,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-12 16:14:46,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 70 transitions. [2020-10-12 16:14:46,815 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 70 transitions. Word has length 28 [2020-10-12 16:14:46,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:46,815 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 70 transitions. [2020-10-12 16:14:46,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:14:46,815 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 70 transitions. [2020-10-12 16:14:46,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:14:46,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:46,817 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:46,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 16:14:46,817 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:46,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:46,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1716359, now seen corresponding path program 9 times [2020-10-12 16:14:46,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:46,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443711405] [2020-10-12 16:14:46,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:46,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:46,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:46,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:47,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:47,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:14:47,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:47,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-10-12 16:14:47,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:47,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:14:47,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:47,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:14:47,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:47,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:47,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:47,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:47,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:47,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:47,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:47,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:47,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:47,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:47,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:47,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:14:47,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443711405] [2020-10-12 16:14:47,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:47,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:14:47,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314285749] [2020-10-12 16:14:47,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:14:47,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:47,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:14:47,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:14:47,202 INFO L87 Difference]: Start difference. First operand 50 states and 70 transitions. Second operand 15 states. [2020-10-12 16:14:47,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:47,441 INFO L93 Difference]: Finished difference Result 59 states and 81 transitions. [2020-10-12 16:14:47,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 16:14:47,442 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-10-12 16:14:47,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:47,444 INFO L225 Difference]: With dead ends: 59 [2020-10-12 16:14:47,444 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 16:14:47,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:14:47,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 16:14:47,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-12 16:14:47,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 16:14:47,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 76 transitions. [2020-10-12 16:14:47,452 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 76 transitions. Word has length 30 [2020-10-12 16:14:47,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:47,453 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 76 transitions. [2020-10-12 16:14:47,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:14:47,453 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 76 transitions. [2020-10-12 16:14:47,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 16:14:47,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:47,454 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:47,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 16:14:47,455 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:47,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:47,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1542508606, now seen corresponding path program 10 times [2020-10-12 16:14:47,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:47,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922976879] [2020-10-12 16:14:47,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:47,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:47,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:47,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:47,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:47,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:47,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:14:47,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:47,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-12 16:14:47,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:47,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:14:47,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:47,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 16:14:47,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:14:48,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:48,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:48,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:48,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:48,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:48,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:48,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:48,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:48,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:48,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:48,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:14:48,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922976879] [2020-10-12 16:14:48,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:48,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:14:48,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085009982] [2020-10-12 16:14:48,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:14:48,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:48,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:14:48,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:14:48,029 INFO L87 Difference]: Start difference. First operand 54 states and 76 transitions. Second operand 16 states. [2020-10-12 16:14:48,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:48,092 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2020-10-12 16:14:48,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:14:48,093 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2020-10-12 16:14:48,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:48,094 INFO L225 Difference]: With dead ends: 63 [2020-10-12 16:14:48,094 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 16:14:48,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:14:48,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 16:14:48,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-12 16:14:48,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 16:14:48,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 82 transitions. [2020-10-12 16:14:48,101 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 82 transitions. Word has length 32 [2020-10-12 16:14:48,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:48,102 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 82 transitions. [2020-10-12 16:14:48,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:14:48,102 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 82 transitions. [2020-10-12 16:14:48,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:14:48,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:48,103 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:48,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 16:14:48,104 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:48,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:48,104 INFO L82 PathProgramCache]: Analyzing trace with hash 515984445, now seen corresponding path program 11 times [2020-10-12 16:14:48,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:48,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318442540] [2020-10-12 16:14:48,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:48,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:48,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:48,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:48,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:48,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:14:48,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:48,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 320 [2020-10-12 16:14:48,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:48,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:14:48,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:48,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 16:14:48,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:48,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:48,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:48,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:48,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:48,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:48,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:48,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:48,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:48,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:48,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:48,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:48,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:14:48,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318442540] [2020-10-12 16:14:48,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:48,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:14:48,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356505401] [2020-10-12 16:14:48,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:14:48,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:48,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:14:48,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:14:48,596 INFO L87 Difference]: Start difference. First operand 58 states and 82 transitions. Second operand 17 states. [2020-10-12 16:14:48,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:48,900 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2020-10-12 16:14:48,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 16:14:48,900 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-10-12 16:14:48,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:48,901 INFO L225 Difference]: With dead ends: 67 [2020-10-12 16:14:48,901 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 16:14:48,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:14:48,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 16:14:48,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-12 16:14:48,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 16:14:48,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 88 transitions. [2020-10-12 16:14:48,915 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 88 transitions. Word has length 34 [2020-10-12 16:14:48,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:48,918 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 88 transitions. [2020-10-12 16:14:48,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:14:48,918 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 88 transitions. [2020-10-12 16:14:48,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:14:48,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:48,920 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:48,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 16:14:48,920 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:48,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:48,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1252117000, now seen corresponding path program 12 times [2020-10-12 16:14:48,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:48,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590661726] [2020-10-12 16:14:48,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:48,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:48,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:49,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:49,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:49,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:14:49,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:49,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 418 [2020-10-12 16:14:49,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:49,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:14:49,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:49,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 16:14:49,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:49,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:49,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:49,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:49,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:49,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:49,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:49,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:49,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:49,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:49,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:49,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:14:49,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590661726] [2020-10-12 16:14:49,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:49,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:14:49,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069245936] [2020-10-12 16:14:49,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:14:49,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:49,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:14:49,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:14:49,535 INFO L87 Difference]: Start difference. First operand 62 states and 88 transitions. Second operand 18 states. [2020-10-12 16:14:49,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:49,605 INFO L93 Difference]: Finished difference Result 71 states and 99 transitions. [2020-10-12 16:14:49,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:14:49,606 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-10-12 16:14:49,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:49,607 INFO L225 Difference]: With dead ends: 71 [2020-10-12 16:14:49,607 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 16:14:49,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:14:49,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 16:14:49,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-12 16:14:49,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 16:14:49,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 94 transitions. [2020-10-12 16:14:49,615 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 94 transitions. Word has length 36 [2020-10-12 16:14:49,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:49,616 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 94 transitions. [2020-10-12 16:14:49,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:14:49,616 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 94 transitions. [2020-10-12 16:14:49,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 16:14:49,617 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:49,617 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:49,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 16:14:49,617 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:49,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:49,618 INFO L82 PathProgramCache]: Analyzing trace with hash 409443571, now seen corresponding path program 13 times [2020-10-12 16:14:49,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:49,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026646259] [2020-10-12 16:14:49,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:49,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:49,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:49,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:49,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:50,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:50,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:14:50,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:50,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 391 [2020-10-12 16:14:50,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:50,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:14:50,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:50,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 16:14:50,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:50,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:50,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:50,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:50,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:50,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:50,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:50,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:50,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:50,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:50,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:50,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:14:50,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026646259] [2020-10-12 16:14:50,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:50,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:14:50,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137236697] [2020-10-12 16:14:50,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:14:50,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:50,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:14:50,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:14:50,236 INFO L87 Difference]: Start difference. First operand 66 states and 94 transitions. Second operand 19 states. [2020-10-12 16:14:50,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:50,551 INFO L93 Difference]: Finished difference Result 75 states and 105 transitions. [2020-10-12 16:14:50,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 16:14:50,552 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2020-10-12 16:14:50,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:50,553 INFO L225 Difference]: With dead ends: 75 [2020-10-12 16:14:50,553 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 16:14:50,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=368, Invalid=754, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:14:50,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 16:14:50,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-12 16:14:50,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 16:14:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 100 transitions. [2020-10-12 16:14:50,560 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 100 transitions. Word has length 38 [2020-10-12 16:14:50,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:50,561 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 100 transitions. [2020-10-12 16:14:50,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:14:50,561 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 100 transitions. [2020-10-12 16:14:50,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 16:14:50,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:50,562 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:50,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 16:14:50,562 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:50,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:50,563 INFO L82 PathProgramCache]: Analyzing trace with hash -558681810, now seen corresponding path program 14 times [2020-10-12 16:14:50,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:50,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031542471] [2020-10-12 16:14:50,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:50,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:50,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:50,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:50,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:50,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 16:14:50,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:50,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 429 [2020-10-12 16:14:50,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:50,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:14:50,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:51,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 16:14:51,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:51,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:51,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:51,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:51,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:51,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:51,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:51,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:51,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:51,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:51,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:51,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 223 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:14:51,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031542471] [2020-10-12 16:14:51,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:51,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:14:51,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691331781] [2020-10-12 16:14:51,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:14:51,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:51,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:14:51,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:14:51,206 INFO L87 Difference]: Start difference. First operand 70 states and 100 transitions. Second operand 20 states. [2020-10-12 16:14:51,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:51,283 INFO L93 Difference]: Finished difference Result 79 states and 111 transitions. [2020-10-12 16:14:51,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:14:51,284 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 40 [2020-10-12 16:14:51,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:51,285 INFO L225 Difference]: With dead ends: 79 [2020-10-12 16:14:51,285 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 16:14:51,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:14:51,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 16:14:51,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-12 16:14:51,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-12 16:14:51,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 106 transitions. [2020-10-12 16:14:51,292 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 106 transitions. Word has length 40 [2020-10-12 16:14:51,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:51,293 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 106 transitions. [2020-10-12 16:14:51,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 16:14:51,293 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 106 transitions. [2020-10-12 16:14:51,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 16:14:51,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:51,294 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:51,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 16:14:51,294 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:51,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:51,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1080730281, now seen corresponding path program 15 times [2020-10-12 16:14:51,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:51,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998893831] [2020-10-12 16:14:51,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:51,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:51,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:51,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:51,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:51,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 16:14:51,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:51,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 479 [2020-10-12 16:14:51,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:51,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:14:51,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:51,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 16:14:51,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:14:52,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:52,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:52,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:52,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:52,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:52,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:52,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:52,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:52,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:52,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:52,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:52,020 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:14:52,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998893831] [2020-10-12 16:14:52,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:52,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:14:52,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380813320] [2020-10-12 16:14:52,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:14:52,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:52,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:14:52,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:14:52,024 INFO L87 Difference]: Start difference. First operand 74 states and 106 transitions. Second operand 21 states. [2020-10-12 16:14:52,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:52,094 INFO L93 Difference]: Finished difference Result 83 states and 117 transitions. [2020-10-12 16:14:52,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 16:14:52,095 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 42 [2020-10-12 16:14:52,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:52,096 INFO L225 Difference]: With dead ends: 83 [2020-10-12 16:14:52,096 INFO L226 Difference]: Without dead ends: 78 [2020-10-12 16:14:52,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:14:52,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-12 16:14:52,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-12 16:14:52,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 16:14:52,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 112 transitions. [2020-10-12 16:14:52,106 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 112 transitions. Word has length 42 [2020-10-12 16:14:52,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:52,108 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 112 transitions. [2020-10-12 16:14:52,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:14:52,108 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 112 transitions. [2020-10-12 16:14:52,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 16:14:52,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:52,109 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:52,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 16:14:52,109 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:52,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:52,110 INFO L82 PathProgramCache]: Analyzing trace with hash 302752100, now seen corresponding path program 16 times [2020-10-12 16:14:52,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:52,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473650591] [2020-10-12 16:14:52,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:52,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:52,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:52,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:52,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:52,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 16:14:52,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:52,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 471 [2020-10-12 16:14:52,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:52,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:14:52,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:52,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 16:14:52,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:52,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:52,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:52,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:52,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:52,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:52,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:52,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:52,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:52,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:52,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:52,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:14:52,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473650591] [2020-10-12 16:14:52,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:52,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 16:14:52,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457470618] [2020-10-12 16:14:52,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 16:14:52,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:52,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 16:14:52,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:14:52,878 INFO L87 Difference]: Start difference. First operand 78 states and 112 transitions. Second operand 22 states. [2020-10-12 16:14:52,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:52,955 INFO L93 Difference]: Finished difference Result 87 states and 123 transitions. [2020-10-12 16:14:52,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:14:52,956 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 44 [2020-10-12 16:14:52,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:52,957 INFO L225 Difference]: With dead ends: 87 [2020-10-12 16:14:52,957 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 16:14:52,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:14:52,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 16:14:52,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-12 16:14:52,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-12 16:14:52,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 118 transitions. [2020-10-12 16:14:52,973 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 118 transitions. Word has length 44 [2020-10-12 16:14:52,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:52,973 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 118 transitions. [2020-10-12 16:14:52,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 16:14:52,974 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 118 transitions. [2020-10-12 16:14:52,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 16:14:52,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:52,974 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:52,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 16:14:52,975 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:52,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:52,976 INFO L82 PathProgramCache]: Analyzing trace with hash -9970337, now seen corresponding path program 17 times [2020-10-12 16:14:52,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:52,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652517140] [2020-10-12 16:14:52,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:52,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:52,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:53,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:53,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:53,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 16:14:53,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:53,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 570 [2020-10-12 16:14:53,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:53,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:14:53,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:53,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 16:14:53,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:53,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:53,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:53,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:53,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:53,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:53,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:53,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:53,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:53,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:53,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:53,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:53,857 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 322 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:14:53,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652517140] [2020-10-12 16:14:53,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:53,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 16:14:53,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962660890] [2020-10-12 16:14:53,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 16:14:53,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:53,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 16:14:53,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:14:53,862 INFO L87 Difference]: Start difference. First operand 82 states and 118 transitions. Second operand 23 states. [2020-10-12 16:14:54,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:54,322 INFO L93 Difference]: Finished difference Result 91 states and 129 transitions. [2020-10-12 16:14:54,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 16:14:54,323 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 46 [2020-10-12 16:14:54,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:54,324 INFO L225 Difference]: With dead ends: 91 [2020-10-12 16:14:54,324 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 16:14:54,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=578, Invalid=1144, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:14:54,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 16:14:54,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-12 16:14:54,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-12 16:14:54,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 124 transitions. [2020-10-12 16:14:54,332 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 124 transitions. Word has length 46 [2020-10-12 16:14:54,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:54,332 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 124 transitions. [2020-10-12 16:14:54,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 16:14:54,332 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 124 transitions. [2020-10-12 16:14:54,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 16:14:54,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:54,333 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:54,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 16:14:54,334 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:54,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:54,334 INFO L82 PathProgramCache]: Analyzing trace with hash 111478426, now seen corresponding path program 18 times [2020-10-12 16:14:54,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:54,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855130486] [2020-10-12 16:14:54,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:54,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:54,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:54,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:54,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:54,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 16:14:54,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:54,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 536 [2020-10-12 16:14:54,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:54,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:14:54,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:54,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 16:14:54,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:55,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:55,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:55,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:55,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:55,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:55,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:55,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:55,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:55,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:55,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:55,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:55,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:55,173 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 359 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:14:55,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855130486] [2020-10-12 16:14:55,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:55,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 16:14:55,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760578683] [2020-10-12 16:14:55,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 16:14:55,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:55,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 16:14:55,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:14:55,175 INFO L87 Difference]: Start difference. First operand 86 states and 124 transitions. Second operand 24 states. [2020-10-12 16:14:55,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:55,246 INFO L93 Difference]: Finished difference Result 95 states and 135 transitions. [2020-10-12 16:14:55,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 16:14:55,246 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 48 [2020-10-12 16:14:55,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:55,247 INFO L225 Difference]: With dead ends: 95 [2020-10-12 16:14:55,248 INFO L226 Difference]: Without dead ends: 90 [2020-10-12 16:14:55,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:14:55,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-12 16:14:55,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-12 16:14:55,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-12 16:14:55,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 130 transitions. [2020-10-12 16:14:55,255 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 130 transitions. Word has length 48 [2020-10-12 16:14:55,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:55,256 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 130 transitions. [2020-10-12 16:14:55,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 16:14:55,256 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 130 transitions. [2020-10-12 16:14:55,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 16:14:55,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:55,257 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:55,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 16:14:55,257 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:55,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:55,257 INFO L82 PathProgramCache]: Analyzing trace with hash 859622677, now seen corresponding path program 19 times [2020-10-12 16:14:55,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:55,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693921876] [2020-10-12 16:14:55,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:55,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:55,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:55,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:55,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:55,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 16:14:55,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:55,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 482 [2020-10-12 16:14:55,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:55,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:14:55,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:55,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 16:14:55,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:56,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:56,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:56,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:56,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:56,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:56,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:56,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:56,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:56,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:56,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:56,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 398 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:14:56,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693921876] [2020-10-12 16:14:56,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:56,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:14:56,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169053944] [2020-10-12 16:14:56,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:14:56,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:56,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:14:56,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:14:56,087 INFO L87 Difference]: Start difference. First operand 90 states and 130 transitions. Second operand 25 states. [2020-10-12 16:14:56,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:56,176 INFO L93 Difference]: Finished difference Result 99 states and 141 transitions. [2020-10-12 16:14:56,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 16:14:56,176 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 50 [2020-10-12 16:14:56,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:56,177 INFO L225 Difference]: With dead ends: 99 [2020-10-12 16:14:56,178 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 16:14:56,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=457, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:14:56,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 16:14:56,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-12 16:14:56,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-12 16:14:56,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 136 transitions. [2020-10-12 16:14:56,184 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 136 transitions. Word has length 50 [2020-10-12 16:14:56,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:56,184 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 136 transitions. [2020-10-12 16:14:56,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:14:56,184 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 136 transitions. [2020-10-12 16:14:56,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 16:14:56,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:56,185 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:56,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 16:14:56,186 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:56,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:56,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1728257840, now seen corresponding path program 20 times [2020-10-12 16:14:56,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:56,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13099472] [2020-10-12 16:14:56,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:56,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:56,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:56,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:56,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:56,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:56,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 16:14:56,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:56,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 629 [2020-10-12 16:14:56,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:56,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 16:14:56,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:56,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 16:14:56,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:57,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:57,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:57,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:57,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:57,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:57,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:57,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:57,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:57,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:57,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:57,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:57,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 439 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:14:57,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13099472] [2020-10-12 16:14:57,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:57,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 16:14:57,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872632274] [2020-10-12 16:14:57,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 16:14:57,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:57,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 16:14:57,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:14:57,152 INFO L87 Difference]: Start difference. First operand 94 states and 136 transitions. Second operand 26 states. [2020-10-12 16:14:57,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:57,693 INFO L93 Difference]: Finished difference Result 103 states and 147 transitions. [2020-10-12 16:14:57,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 16:14:57,694 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 52 [2020-10-12 16:14:57,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:57,695 INFO L225 Difference]: With dead ends: 103 [2020-10-12 16:14:57,695 INFO L226 Difference]: Without dead ends: 98 [2020-10-12 16:14:57,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=767, Invalid=1489, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:14:57,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-12 16:14:57,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-12 16:14:57,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-12 16:14:57,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 142 transitions. [2020-10-12 16:14:57,702 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 142 transitions. Word has length 52 [2020-10-12 16:14:57,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:57,703 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 142 transitions. [2020-10-12 16:14:57,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 16:14:57,703 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 142 transitions. [2020-10-12 16:14:57,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 16:14:57,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:57,704 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:57,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 16:14:57,704 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:57,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:57,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1895370293, now seen corresponding path program 21 times [2020-10-12 16:14:57,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:57,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994387918] [2020-10-12 16:14:57,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:57,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:57,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:58,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:58,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:58,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 16:14:58,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:58,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 598 [2020-10-12 16:14:58,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:58,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 16:14:58,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:58,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 16:14:58,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:58,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:58,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:58,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:58,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:58,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:58,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:58,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:58,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:58,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:58,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:58,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:58,671 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 482 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:14:58,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994387918] [2020-10-12 16:14:58,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:58,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 16:14:58,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440811927] [2020-10-12 16:14:58,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 16:14:58,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:58,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 16:14:58,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:14:58,674 INFO L87 Difference]: Start difference. First operand 98 states and 142 transitions. Second operand 27 states. [2020-10-12 16:14:59,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:59,262 INFO L93 Difference]: Finished difference Result 107 states and 153 transitions. [2020-10-12 16:14:59,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 16:14:59,262 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 54 [2020-10-12 16:14:59,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:59,264 INFO L225 Difference]: With dead ends: 107 [2020-10-12 16:14:59,264 INFO L226 Difference]: Without dead ends: 102 [2020-10-12 16:14:59,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=836, Invalid=1614, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 16:14:59,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-12 16:14:59,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-12 16:14:59,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-12 16:14:59,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 148 transitions. [2020-10-12 16:14:59,272 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 148 transitions. Word has length 54 [2020-10-12 16:14:59,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:59,273 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 148 transitions. [2020-10-12 16:14:59,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 16:14:59,273 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 148 transitions. [2020-10-12 16:14:59,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 16:14:59,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:59,274 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:59,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 16:14:59,274 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:59,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:59,275 INFO L82 PathProgramCache]: Analyzing trace with hash 718319622, now seen corresponding path program 22 times [2020-10-12 16:14:59,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:59,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75936218] [2020-10-12 16:14:59,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:59,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:59,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:59,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:59,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:59,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 16:14:59,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:59,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 624 [2020-10-12 16:14:59,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:59,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 16:14:59,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:59,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 16:14:59,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:00,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:00,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:00,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:00,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:00,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:00,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:00,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:00,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:00,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:00,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:00,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:00,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 527 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:00,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75936218] [2020-10-12 16:15:00,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:00,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 16:15:00,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496040882] [2020-10-12 16:15:00,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 16:15:00,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:00,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 16:15:00,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:15:00,292 INFO L87 Difference]: Start difference. First operand 102 states and 148 transitions. Second operand 28 states. [2020-10-12 16:15:00,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:00,401 INFO L93 Difference]: Finished difference Result 111 states and 159 transitions. [2020-10-12 16:15:00,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 16:15:00,401 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 56 [2020-10-12 16:15:00,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:00,403 INFO L225 Difference]: With dead ends: 111 [2020-10-12 16:15:00,403 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 16:15:00,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=314, Invalid=556, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:15:00,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 16:15:00,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-12 16:15:00,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-12 16:15:00,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 154 transitions. [2020-10-12 16:15:00,413 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 154 transitions. Word has length 56 [2020-10-12 16:15:00,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:00,413 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 154 transitions. [2020-10-12 16:15:00,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 16:15:00,413 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 154 transitions. [2020-10-12 16:15:00,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 16:15:00,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:00,420 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:00,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 16:15:00,420 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:00,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:00,421 INFO L82 PathProgramCache]: Analyzing trace with hash -81540223, now seen corresponding path program 23 times [2020-10-12 16:15:00,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:00,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296131663] [2020-10-12 16:15:00,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:00,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:00,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:00,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:00,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:01,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:01,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 16:15:01,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:01,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 605 [2020-10-12 16:15:01,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:01,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 16:15:01,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:01,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 16:15:01,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:01,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:01,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:01,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:01,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:01,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:01,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:01,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:01,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:01,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:01,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:01,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:15:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:01,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296131663] [2020-10-12 16:15:01,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:01,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 16:15:01,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197336192] [2020-10-12 16:15:01,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 16:15:01,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:01,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 16:15:01,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:15:01,556 INFO L87 Difference]: Start difference. First operand 106 states and 154 transitions. Second operand 29 states. [2020-10-12 16:15:01,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:01,695 INFO L93 Difference]: Finished difference Result 115 states and 165 transitions. [2020-10-12 16:15:01,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 16:15:01,695 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 58 [2020-10-12 16:15:01,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:01,697 INFO L225 Difference]: With dead ends: 115 [2020-10-12 16:15:01,697 INFO L226 Difference]: Without dead ends: 110 [2020-10-12 16:15:01,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=339, Invalid=591, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:15:01,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-12 16:15:01,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-10-12 16:15:01,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-12 16:15:01,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 160 transitions. [2020-10-12 16:15:01,704 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 160 transitions. Word has length 58 [2020-10-12 16:15:01,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:01,705 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 160 transitions. [2020-10-12 16:15:01,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 16:15:01,705 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 160 transitions. [2020-10-12 16:15:01,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 16:15:01,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:01,707 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:01,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 16:15:01,707 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:01,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:01,708 INFO L82 PathProgramCache]: Analyzing trace with hash 52294716, now seen corresponding path program 24 times [2020-10-12 16:15:01,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:01,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50811466] [2020-10-12 16:15:01,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:01,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:01,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:02,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:02,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:02,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 16:15:02,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:02,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 650 [2020-10-12 16:15:02,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:02,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 16:15:02,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:02,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 16:15:02,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:02,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:02,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:02,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:02,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:02,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:02,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:02,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:02,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:02,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:02,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:02,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 623 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:02,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50811466] [2020-10-12 16:15:02,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:02,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 16:15:02,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590051550] [2020-10-12 16:15:02,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 16:15:02,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:02,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 16:15:02,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:15:02,827 INFO L87 Difference]: Start difference. First operand 110 states and 160 transitions. Second operand 30 states. [2020-10-12 16:15:03,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:03,435 INFO L93 Difference]: Finished difference Result 119 states and 171 transitions. [2020-10-12 16:15:03,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-12 16:15:03,436 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 60 [2020-10-12 16:15:03,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:03,437 INFO L225 Difference]: With dead ends: 119 [2020-10-12 16:15:03,437 INFO L226 Difference]: Without dead ends: 114 [2020-10-12 16:15:03,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1061, Invalid=2019, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 16:15:03,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-12 16:15:03,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-10-12 16:15:03,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-12 16:15:03,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 166 transitions. [2020-10-12 16:15:03,444 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 166 transitions. Word has length 60 [2020-10-12 16:15:03,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:03,445 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 166 transitions. [2020-10-12 16:15:03,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 16:15:03,445 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 166 transitions. [2020-10-12 16:15:03,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 16:15:03,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:03,446 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:03,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 16:15:03,446 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:03,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:03,447 INFO L82 PathProgramCache]: Analyzing trace with hash -181347785, now seen corresponding path program 25 times [2020-10-12 16:15:03,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:03,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056730921] [2020-10-12 16:15:03,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:03,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:03,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:03,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:03,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:03,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:03,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 16:15:03,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:03,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 489 [2020-10-12 16:15:03,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:03,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 16:15:03,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:03,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 16:15:03,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:04,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:04,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:04,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:04,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:04,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:04,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:04,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:04,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:04,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:04,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:04,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 674 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:04,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056730921] [2020-10-12 16:15:04,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:04,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 16:15:04,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76235238] [2020-10-12 16:15:04,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 16:15:04,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:04,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 16:15:04,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:15:04,414 INFO L87 Difference]: Start difference. First operand 114 states and 166 transitions. Second operand 31 states. [2020-10-12 16:15:04,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:04,510 INFO L93 Difference]: Finished difference Result 123 states and 177 transitions. [2020-10-12 16:15:04,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 16:15:04,511 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 62 [2020-10-12 16:15:04,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:04,513 INFO L225 Difference]: With dead ends: 123 [2020-10-12 16:15:04,513 INFO L226 Difference]: Without dead ends: 118 [2020-10-12 16:15:04,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=392, Invalid=664, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:15:04,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-12 16:15:04,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-10-12 16:15:04,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-12 16:15:04,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 172 transitions. [2020-10-12 16:15:04,520 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 172 transitions. Word has length 62 [2020-10-12 16:15:04,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:04,520 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 172 transitions. [2020-10-12 16:15:04,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 16:15:04,520 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 172 transitions. [2020-10-12 16:15:04,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 16:15:04,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:04,521 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:04,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 16:15:04,521 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:04,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:04,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1373491854, now seen corresponding path program 26 times [2020-10-12 16:15:04,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:04,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676788210] [2020-10-12 16:15:04,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:04,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:04,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:04,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:04,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:05,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:05,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 16:15:05,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:05,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 625 [2020-10-12 16:15:05,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:05,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 16:15:05,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:05,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 16:15:05,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:05,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:05,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:05,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:05,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:05,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:05,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:05,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:05,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:05,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:05,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:05,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 727 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:05,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676788210] [2020-10-12 16:15:05,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:05,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 16:15:05,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807097201] [2020-10-12 16:15:05,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 16:15:05,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:05,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 16:15:05,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:15:05,703 INFO L87 Difference]: Start difference. First operand 118 states and 172 transitions. Second operand 32 states. [2020-10-12 16:15:05,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:05,814 INFO L93 Difference]: Finished difference Result 127 states and 183 transitions. [2020-10-12 16:15:05,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 16:15:05,814 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 64 [2020-10-12 16:15:05,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:05,816 INFO L225 Difference]: With dead ends: 127 [2020-10-12 16:15:05,816 INFO L226 Difference]: Without dead ends: 122 [2020-10-12 16:15:05,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=420, Invalid=702, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:15:05,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-12 16:15:05,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-10-12 16:15:05,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-12 16:15:05,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 178 transitions. [2020-10-12 16:15:05,823 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 178 transitions. Word has length 64 [2020-10-12 16:15:05,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:05,823 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 178 transitions. [2020-10-12 16:15:05,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 16:15:05,823 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 178 transitions. [2020-10-12 16:15:05,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 16:15:05,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:05,824 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:05,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 16:15:05,825 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:05,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:05,825 INFO L82 PathProgramCache]: Analyzing trace with hash -267674131, now seen corresponding path program 27 times [2020-10-12 16:15:05,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:05,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131198579] [2020-10-12 16:15:05,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:05,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:05,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:06,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:06,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:06,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 16:15:06,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:06,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 458 [2020-10-12 16:15:06,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:06,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 16:15:06,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:06,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 16:15:06,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:06,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:06,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:06,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:06,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:06,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:06,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:06,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:06,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:06,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:06,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:06,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:06,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131198579] [2020-10-12 16:15:06,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:06,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 16:15:06,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126682492] [2020-10-12 16:15:06,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 16:15:06,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:06,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 16:15:06,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:15:06,815 INFO L87 Difference]: Start difference. First operand 122 states and 178 transitions. Second operand 33 states. [2020-10-12 16:15:06,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:06,967 INFO L93 Difference]: Finished difference Result 131 states and 189 transitions. [2020-10-12 16:15:06,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 16:15:06,967 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 66 [2020-10-12 16:15:06,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:06,969 INFO L225 Difference]: With dead ends: 131 [2020-10-12 16:15:06,969 INFO L226 Difference]: Without dead ends: 126 [2020-10-12 16:15:06,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=449, Invalid=741, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:15:06,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-12 16:15:06,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-10-12 16:15:06,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-12 16:15:06,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 184 transitions. [2020-10-12 16:15:06,975 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 184 transitions. Word has length 66 [2020-10-12 16:15:06,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:06,976 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 184 transitions. [2020-10-12 16:15:06,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 16:15:06,976 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 184 transitions. [2020-10-12 16:15:06,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 16:15:06,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:06,977 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:06,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 16:15:06,977 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:06,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:06,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1566235560, now seen corresponding path program 28 times [2020-10-12 16:15:06,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:06,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972136334] [2020-10-12 16:15:06,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:06,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:07,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:07,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:07,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:07,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 16:15:07,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:07,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 528 [2020-10-12 16:15:07,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:07,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 16:15:07,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:07,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-12 16:15:07,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:08,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:08,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:08,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:08,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:08,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:08,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:08,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:08,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:08,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:08,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:08,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:08,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 839 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:08,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972136334] [2020-10-12 16:15:08,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:08,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 16:15:08,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153382201] [2020-10-12 16:15:08,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 16:15:08,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:08,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 16:15:08,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:15:08,074 INFO L87 Difference]: Start difference. First operand 126 states and 184 transitions. Second operand 34 states. [2020-10-12 16:15:08,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:08,972 INFO L93 Difference]: Finished difference Result 135 states and 195 transitions. [2020-10-12 16:15:08,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-12 16:15:08,972 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 68 [2020-10-12 16:15:08,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:08,974 INFO L225 Difference]: With dead ends: 135 [2020-10-12 16:15:08,974 INFO L226 Difference]: Without dead ends: 130 [2020-10-12 16:15:08,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1403, Invalid=2629, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 16:15:08,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-12 16:15:08,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-12 16:15:08,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-12 16:15:08,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 190 transitions. [2020-10-12 16:15:08,982 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 190 transitions. Word has length 68 [2020-10-12 16:15:08,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:08,982 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 190 transitions. [2020-10-12 16:15:08,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 16:15:08,982 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 190 transitions. [2020-10-12 16:15:08,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 16:15:08,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:08,983 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:08,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 16:15:08,984 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:08,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:08,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1278110045, now seen corresponding path program 29 times [2020-10-12 16:15:08,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:08,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145642913] [2020-10-12 16:15:08,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:08,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:09,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:09,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:09,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:09,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 16:15:09,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:09,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 769 [2020-10-12 16:15:09,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:09,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 16:15:09,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:09,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 16:15:09,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:10,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:10,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:10,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:10,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:10,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:10,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:10,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:10,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:10,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:10,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:10,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:10,347 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 898 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:10,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145642913] [2020-10-12 16:15:10,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:10,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 16:15:10,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237620781] [2020-10-12 16:15:10,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 16:15:10,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:10,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 16:15:10,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:15:10,350 INFO L87 Difference]: Start difference. First operand 130 states and 190 transitions. Second operand 35 states. [2020-10-12 16:15:11,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:11,294 INFO L93 Difference]: Finished difference Result 139 states and 201 transitions. [2020-10-12 16:15:11,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-12 16:15:11,295 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 70 [2020-10-12 16:15:11,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:11,297 INFO L225 Difference]: With dead ends: 139 [2020-10-12 16:15:11,297 INFO L226 Difference]: Without dead ends: 134 [2020-10-12 16:15:11,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1496, Invalid=2794, Unknown=0, NotChecked=0, Total=4290 [2020-10-12 16:15:11,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-12 16:15:11,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-10-12 16:15:11,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-12 16:15:11,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 196 transitions. [2020-10-12 16:15:11,306 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 196 transitions. Word has length 70 [2020-10-12 16:15:11,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:11,306 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 196 transitions. [2020-10-12 16:15:11,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 16:15:11,306 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 196 transitions. [2020-10-12 16:15:11,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 16:15:11,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:11,307 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:11,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 16:15:11,308 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:11,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:11,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1199931102, now seen corresponding path program 30 times [2020-10-12 16:15:11,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:11,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625994220] [2020-10-12 16:15:11,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:11,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:11,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:11,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:11,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:11,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 16:15:11,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:11,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 658 [2020-10-12 16:15:11,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:11,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 16:15:11,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:11,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-12 16:15:11,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:12,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:12,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:12,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:12,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:12,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:12,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:12,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:12,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:12,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:12,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:12,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:12,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 959 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:12,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625994220] [2020-10-12 16:15:12,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:12,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 16:15:12,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338749144] [2020-10-12 16:15:12,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 16:15:12,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:12,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 16:15:12,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:15:12,597 INFO L87 Difference]: Start difference. First operand 134 states and 196 transitions. Second operand 36 states. [2020-10-12 16:15:12,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:12,727 INFO L93 Difference]: Finished difference Result 143 states and 207 transitions. [2020-10-12 16:15:12,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 16:15:12,728 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 72 [2020-10-12 16:15:12,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:12,729 INFO L225 Difference]: With dead ends: 143 [2020-10-12 16:15:12,730 INFO L226 Difference]: Without dead ends: 138 [2020-10-12 16:15:12,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=542, Invalid=864, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:15:12,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-12 16:15:12,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-10-12 16:15:12,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-12 16:15:12,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 202 transitions. [2020-10-12 16:15:12,737 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 202 transitions. Word has length 72 [2020-10-12 16:15:12,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:12,738 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 202 transitions. [2020-10-12 16:15:12,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 16:15:12,738 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 202 transitions. [2020-10-12 16:15:12,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 16:15:12,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:12,739 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:12,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 16:15:12,739 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:12,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:12,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1109375911, now seen corresponding path program 31 times [2020-10-12 16:15:12,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:12,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814483882] [2020-10-12 16:15:12,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:12,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:12,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:13,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:13,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:13,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 16:15:13,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:13,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 618 [2020-10-12 16:15:13,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:13,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 16:15:13,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:13,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-12 16:15:13,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:14,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:14,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:14,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:14,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:14,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:14,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:14,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:14,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:14,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:14,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:14,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1022 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:14,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814483882] [2020-10-12 16:15:14,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:14,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 16:15:14,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51202132] [2020-10-12 16:15:14,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 16:15:14,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:14,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 16:15:14,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:15:14,043 INFO L87 Difference]: Start difference. First operand 138 states and 202 transitions. Second operand 37 states. [2020-10-12 16:15:14,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:14,177 INFO L93 Difference]: Finished difference Result 147 states and 213 transitions. [2020-10-12 16:15:14,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 16:15:14,180 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 74 [2020-10-12 16:15:14,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:14,181 INFO L225 Difference]: With dead ends: 147 [2020-10-12 16:15:14,181 INFO L226 Difference]: Without dead ends: 142 [2020-10-12 16:15:14,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=575, Invalid=907, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:15:14,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-12 16:15:14,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-12 16:15:14,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-12 16:15:14,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 208 transitions. [2020-10-12 16:15:14,187 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 208 transitions. Word has length 74 [2020-10-12 16:15:14,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:14,188 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 208 transitions. [2020-10-12 16:15:14,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 16:15:14,188 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 208 transitions. [2020-10-12 16:15:14,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 16:15:14,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:14,189 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:14,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 16:15:14,189 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:14,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:14,190 INFO L82 PathProgramCache]: Analyzing trace with hash 144676628, now seen corresponding path program 32 times [2020-10-12 16:15:14,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:14,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381972621] [2020-10-12 16:15:14,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:14,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:14,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:14,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:14,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:14,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 16:15:14,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:14,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 706 [2020-10-12 16:15:14,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:14,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 16:15:14,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:14,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-12 16:15:14,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:15,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:15,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:15,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:15,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:15,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:15,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:15,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:15,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:15,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:15,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:15,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:15,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1087 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:15,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381972621] [2020-10-12 16:15:15,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:15,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 16:15:15,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366750417] [2020-10-12 16:15:15,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 16:15:15,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:15,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 16:15:15,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=805, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:15:15,594 INFO L87 Difference]: Start difference. First operand 142 states and 208 transitions. Second operand 38 states. [2020-10-12 16:15:15,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:15,718 INFO L93 Difference]: Finished difference Result 151 states and 219 transitions. [2020-10-12 16:15:15,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 16:15:15,719 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 76 [2020-10-12 16:15:15,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:15,721 INFO L225 Difference]: With dead ends: 151 [2020-10-12 16:15:15,721 INFO L226 Difference]: Without dead ends: 146 [2020-10-12 16:15:15,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=609, Invalid=951, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:15:15,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-12 16:15:15,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2020-10-12 16:15:15,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-12 16:15:15,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 214 transitions. [2020-10-12 16:15:15,728 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 214 transitions. Word has length 76 [2020-10-12 16:15:15,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:15,729 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 214 transitions. [2020-10-12 16:15:15,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 16:15:15,729 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 214 transitions. [2020-10-12 16:15:15,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 16:15:15,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:15,730 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:15,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 16:15:15,730 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:15,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:15,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1596643569, now seen corresponding path program 33 times [2020-10-12 16:15:15,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:15,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464926318] [2020-10-12 16:15:15,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:15,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:15,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:15,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:16,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:16,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 16:15:16,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:16,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 763 [2020-10-12 16:15:16,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:16,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 16:15:16,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:16,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-12 16:15:16,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:17,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:17,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:17,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:17,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:17,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:17,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:17,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:17,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:17,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:17,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:17,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:17,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1154 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:17,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464926318] [2020-10-12 16:15:17,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:17,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 16:15:17,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728488408] [2020-10-12 16:15:17,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 16:15:17,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:17,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 16:15:17,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:15:17,252 INFO L87 Difference]: Start difference. First operand 146 states and 214 transitions. Second operand 39 states. [2020-10-12 16:15:17,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:17,388 INFO L93 Difference]: Finished difference Result 155 states and 225 transitions. [2020-10-12 16:15:17,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 16:15:17,389 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 78 [2020-10-12 16:15:17,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:17,391 INFO L225 Difference]: With dead ends: 155 [2020-10-12 16:15:17,391 INFO L226 Difference]: Without dead ends: 150 [2020-10-12 16:15:17,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=644, Invalid=996, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:15:17,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-12 16:15:17,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2020-10-12 16:15:17,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-12 16:15:17,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 220 transitions. [2020-10-12 16:15:17,398 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 220 transitions. Word has length 78 [2020-10-12 16:15:17,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:17,399 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 220 transitions. [2020-10-12 16:15:17,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 16:15:17,399 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 220 transitions. [2020-10-12 16:15:17,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 16:15:17,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:17,400 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:17,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 16:15:17,400 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:17,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:17,401 INFO L82 PathProgramCache]: Analyzing trace with hash 31892554, now seen corresponding path program 34 times [2020-10-12 16:15:17,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:17,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680072993] [2020-10-12 16:15:17,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:17,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:17,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:17,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:18,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:18,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 16:15:18,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:18,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 804 [2020-10-12 16:15:18,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:18,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 16:15:18,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:18,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-12 16:15:18,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:18,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:18,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:18,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:18,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:18,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:18,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:18,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:18,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:18,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:18,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:18,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:18,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1223 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:18,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680072993] [2020-10-12 16:15:18,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:18,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 16:15:18,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030640318] [2020-10-12 16:15:18,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 16:15:18,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:18,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 16:15:18,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:15:18,953 INFO L87 Difference]: Start difference. First operand 150 states and 220 transitions. Second operand 40 states. [2020-10-12 16:15:19,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:19,126 INFO L93 Difference]: Finished difference Result 159 states and 231 transitions. [2020-10-12 16:15:19,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 16:15:19,127 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 80 [2020-10-12 16:15:19,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:19,128 INFO L225 Difference]: With dead ends: 159 [2020-10-12 16:15:19,128 INFO L226 Difference]: Without dead ends: 154 [2020-10-12 16:15:19,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=680, Invalid=1042, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:15:19,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-12 16:15:19,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2020-10-12 16:15:19,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-12 16:15:19,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 226 transitions. [2020-10-12 16:15:19,142 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 226 transitions. Word has length 80 [2020-10-12 16:15:19,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:19,142 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 226 transitions. [2020-10-12 16:15:19,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 16:15:19,142 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 226 transitions. [2020-10-12 16:15:19,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 16:15:19,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:19,143 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:19,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 16:15:19,145 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:19,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:19,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1687011013, now seen corresponding path program 35 times [2020-10-12 16:15:19,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:19,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327544197] [2020-10-12 16:15:19,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:19,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:19,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:19,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:19,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:19,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:19,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-12 16:15:19,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:19,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 838 [2020-10-12 16:15:19,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:19,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 16:15:19,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:19,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-12 16:15:19,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:20,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:20,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:20,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:20,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:20,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:20,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:20,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:20,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:20,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:20,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:20,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1294 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:20,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327544197] [2020-10-12 16:15:20,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:20,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 16:15:20,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942931673] [2020-10-12 16:15:20,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 16:15:20,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:20,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 16:15:20,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:15:20,837 INFO L87 Difference]: Start difference. First operand 154 states and 226 transitions. Second operand 41 states. [2020-10-12 16:15:21,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:21,024 INFO L93 Difference]: Finished difference Result 163 states and 237 transitions. [2020-10-12 16:15:21,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 16:15:21,024 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 82 [2020-10-12 16:15:21,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:21,026 INFO L225 Difference]: With dead ends: 163 [2020-10-12 16:15:21,027 INFO L226 Difference]: Without dead ends: 158 [2020-10-12 16:15:21,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=717, Invalid=1089, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:15:21,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-12 16:15:21,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2020-10-12 16:15:21,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-12 16:15:21,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 232 transitions. [2020-10-12 16:15:21,035 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 232 transitions. Word has length 82 [2020-10-12 16:15:21,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:21,035 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 232 transitions. [2020-10-12 16:15:21,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 16:15:21,035 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 232 transitions. [2020-10-12 16:15:21,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-12 16:15:21,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:21,037 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:21,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 16:15:21,037 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:21,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:21,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1177016704, now seen corresponding path program 36 times [2020-10-12 16:15:21,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:21,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368365513] [2020-10-12 16:15:21,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:21,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:21,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:21,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:21,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:22,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:22,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 16:15:22,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:22,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 974 [2020-10-12 16:15:22,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:22,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 16:15:22,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:22,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-12 16:15:22,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:22,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:22,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:22,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:22,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:22,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:22,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:22,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:22,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:22,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:22,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:22,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:22,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1367 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:22,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368365513] [2020-10-12 16:15:22,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:22,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 16:15:22,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927513347] [2020-10-12 16:15:22,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 16:15:22,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:22,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 16:15:22,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:15:22,881 INFO L87 Difference]: Start difference. First operand 158 states and 232 transitions. Second operand 42 states. [2020-10-12 16:15:23,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:23,002 INFO L93 Difference]: Finished difference Result 167 states and 243 transitions. [2020-10-12 16:15:23,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 16:15:23,002 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 84 [2020-10-12 16:15:23,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:23,004 INFO L225 Difference]: With dead ends: 167 [2020-10-12 16:15:23,004 INFO L226 Difference]: Without dead ends: 162 [2020-10-12 16:15:23,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=755, Invalid=1137, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:15:23,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-12 16:15:23,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-10-12 16:15:23,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-12 16:15:23,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 238 transitions. [2020-10-12 16:15:23,011 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 238 transitions. Word has length 84 [2020-10-12 16:15:23,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:23,012 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 238 transitions. [2020-10-12 16:15:23,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 16:15:23,012 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 238 transitions. [2020-10-12 16:15:23,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-12 16:15:23,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:23,013 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:23,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 16:15:23,013 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:23,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:23,013 INFO L82 PathProgramCache]: Analyzing trace with hash -433616005, now seen corresponding path program 37 times [2020-10-12 16:15:23,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:23,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528254847] [2020-10-12 16:15:23,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:23,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:23,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:23,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:23,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:24,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:24,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 16:15:24,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:24,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 998 [2020-10-12 16:15:24,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:24,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 16:15:24,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:24,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-12 16:15:24,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:24,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:24,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:24,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:24,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:24,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:24,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:24,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:24,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:24,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:24,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:24,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1442 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:24,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528254847] [2020-10-12 16:15:24,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:24,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 16:15:24,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973238230] [2020-10-12 16:15:24,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 16:15:24,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:24,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 16:15:24,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:15:24,993 INFO L87 Difference]: Start difference. First operand 162 states and 238 transitions. Second operand 43 states. [2020-10-12 16:15:26,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:26,346 INFO L93 Difference]: Finished difference Result 171 states and 249 transitions. [2020-10-12 16:15:26,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-10-12 16:15:26,346 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 86 [2020-10-12 16:15:26,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:26,348 INFO L225 Difference]: With dead ends: 171 [2020-10-12 16:15:26,348 INFO L226 Difference]: Without dead ends: 166 [2020-10-12 16:15:26,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2348, Invalid=4294, Unknown=0, NotChecked=0, Total=6642 [2020-10-12 16:15:26,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-12 16:15:26,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2020-10-12 16:15:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-12 16:15:26,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 244 transitions. [2020-10-12 16:15:26,354 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 244 transitions. Word has length 86 [2020-10-12 16:15:26,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:26,354 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 244 transitions. [2020-10-12 16:15:26,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 16:15:26,355 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 244 transitions. [2020-10-12 16:15:26,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-12 16:15:26,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:26,356 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:26,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 16:15:26,356 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:26,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:26,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1009884598, now seen corresponding path program 38 times [2020-10-12 16:15:26,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:26,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367207009] [2020-10-12 16:15:26,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:26,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:26,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:26,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:27,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:27,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-12 16:15:27,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:27,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 911 [2020-10-12 16:15:27,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:27,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 16:15:27,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:27,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-12 16:15:27,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:28,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:28,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:28,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:28,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:28,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:28,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:28,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:28,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:28,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:28,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:28,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:28,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1519 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:28,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367207009] [2020-10-12 16:15:28,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:28,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 16:15:28,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903925560] [2020-10-12 16:15:28,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 16:15:28,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:28,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 16:15:28,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=1066, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:15:28,311 INFO L87 Difference]: Start difference. First operand 166 states and 244 transitions. Second operand 44 states. [2020-10-12 16:15:28,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:28,455 INFO L93 Difference]: Finished difference Result 175 states and 255 transitions. [2020-10-12 16:15:28,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 16:15:28,455 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 88 [2020-10-12 16:15:28,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:28,457 INFO L225 Difference]: With dead ends: 175 [2020-10-12 16:15:28,457 INFO L226 Difference]: Without dead ends: 170 [2020-10-12 16:15:28,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=834, Invalid=1236, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:15:28,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-12 16:15:28,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2020-10-12 16:15:28,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-12 16:15:28,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 250 transitions. [2020-10-12 16:15:28,463 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 250 transitions. Word has length 88 [2020-10-12 16:15:28,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:28,464 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 250 transitions. [2020-10-12 16:15:28,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 16:15:28,464 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 250 transitions. [2020-10-12 16:15:28,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-12 16:15:28,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:28,465 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:28,465 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 16:15:28,465 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:28,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:28,465 INFO L82 PathProgramCache]: Analyzing trace with hash 939527473, now seen corresponding path program 39 times [2020-10-12 16:15:28,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:28,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269661421] [2020-10-12 16:15:28,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:28,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:28,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:29,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:29,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:29,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-12 16:15:29,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:29,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 997 [2020-10-12 16:15:29,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:29,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 16:15:29,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:29,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-12 16:15:29,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:30,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:30,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:30,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:30,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:30,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:30,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:30,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:30,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:30,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:30,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:30,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1598 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:30,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269661421] [2020-10-12 16:15:30,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:30,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 16:15:30,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543266357] [2020-10-12 16:15:30,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 16:15:30,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:30,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 16:15:30,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=1113, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:15:30,655 INFO L87 Difference]: Start difference. First operand 170 states and 250 transitions. Second operand 45 states. [2020-10-12 16:15:32,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:32,090 INFO L93 Difference]: Finished difference Result 179 states and 261 transitions. [2020-10-12 16:15:32,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-12 16:15:32,091 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 90 [2020-10-12 16:15:32,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:32,093 INFO L225 Difference]: With dead ends: 179 [2020-10-12 16:15:32,093 INFO L226 Difference]: Without dead ends: 174 [2020-10-12 16:15:32,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2591, Invalid=4719, Unknown=0, NotChecked=0, Total=7310 [2020-10-12 16:15:32,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-12 16:15:32,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2020-10-12 16:15:32,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-12 16:15:32,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 256 transitions. [2020-10-12 16:15:32,100 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 256 transitions. Word has length 90 [2020-10-12 16:15:32,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:32,101 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 256 transitions. [2020-10-12 16:15:32,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 16:15:32,101 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 256 transitions. [2020-10-12 16:15:32,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-12 16:15:32,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:32,102 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:32,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 16:15:32,102 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:32,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:32,103 INFO L82 PathProgramCache]: Analyzing trace with hash 2045807084, now seen corresponding path program 40 times [2020-10-12 16:15:32,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:32,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906370590] [2020-10-12 16:15:32,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:32,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:32,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:32,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:32,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:33,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:33,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-12 16:15:33,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:33,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1043 [2020-10-12 16:15:33,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:33,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 16:15:33,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:33,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-12 16:15:33,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:34,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:34,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:34,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:34,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:34,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:34,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:34,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:34,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:34,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:34,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:34,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1679 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:34,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906370590] [2020-10-12 16:15:34,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:34,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 16:15:34,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330691738] [2020-10-12 16:15:34,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 16:15:34,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:34,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 16:15:34,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=909, Invalid=1161, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:15:34,204 INFO L87 Difference]: Start difference. First operand 174 states and 256 transitions. Second operand 46 states. [2020-10-12 16:15:34,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:34,378 INFO L93 Difference]: Finished difference Result 183 states and 267 transitions. [2020-10-12 16:15:34,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 16:15:34,379 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 92 [2020-10-12 16:15:34,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:34,381 INFO L225 Difference]: With dead ends: 183 [2020-10-12 16:15:34,381 INFO L226 Difference]: Without dead ends: 178 [2020-10-12 16:15:34,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=917, Invalid=1339, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:15:34,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-12 16:15:34,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-10-12 16:15:34,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-12 16:15:34,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 262 transitions. [2020-10-12 16:15:34,387 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 262 transitions. Word has length 92 [2020-10-12 16:15:34,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:34,387 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 262 transitions. [2020-10-12 16:15:34,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 16:15:34,387 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 262 transitions. [2020-10-12 16:15:34,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-12 16:15:34,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:34,388 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:34,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 16:15:34,388 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:34,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:34,388 INFO L82 PathProgramCache]: Analyzing trace with hash 28623847, now seen corresponding path program 41 times [2020-10-12 16:15:34,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:34,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1884713994] [2020-10-12 16:15:34,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:34,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:34,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:34,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:35,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:35,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 16:15:35,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:35,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1255 [2020-10-12 16:15:35,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:35,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-12 16:15:35,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:35,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-12 16:15:35,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:36,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:36,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:36,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:36,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:36,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:36,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:36,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:36,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:36,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:36,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:36,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:36,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:36,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1762 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:36,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1884713994] [2020-10-12 16:15:36,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:36,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-12 16:15:36,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090024747] [2020-10-12 16:15:36,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-12 16:15:36,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:36,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-12 16:15:36,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=1210, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:15:36,707 INFO L87 Difference]: Start difference. First operand 178 states and 262 transitions. Second operand 47 states. [2020-10-12 16:15:36,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:36,855 INFO L93 Difference]: Finished difference Result 187 states and 273 transitions. [2020-10-12 16:15:36,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 16:15:36,856 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 94 [2020-10-12 16:15:36,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:36,857 INFO L225 Difference]: With dead ends: 187 [2020-10-12 16:15:36,857 INFO L226 Difference]: Without dead ends: 182 [2020-10-12 16:15:36,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=960, Invalid=1392, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:15:36,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-12 16:15:36,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2020-10-12 16:15:36,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-12 16:15:36,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 268 transitions. [2020-10-12 16:15:36,864 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 268 transitions. Word has length 94 [2020-10-12 16:15:36,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:36,865 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 268 transitions. [2020-10-12 16:15:36,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-12 16:15:36,865 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 268 transitions. [2020-10-12 16:15:36,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 16:15:36,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:36,866 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:36,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 16:15:36,866 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:36,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:36,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1454216414, now seen corresponding path program 42 times [2020-10-12 16:15:36,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:36,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800856640] [2020-10-12 16:15:36,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:36,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:36,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:37,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:38,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:38,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-12 16:15:38,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:38,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1328 [2020-10-12 16:15:38,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:38,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 16:15:38,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:38,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-12 16:15:38,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:39,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:39,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:39,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:39,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:39,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:39,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:39,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:39,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:39,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:39,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:39,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:39,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1847 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:39,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800856640] [2020-10-12 16:15:39,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:39,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 16:15:39,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915827545] [2020-10-12 16:15:39,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 16:15:39,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:39,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 16:15:39,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=996, Invalid=1260, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:15:39,335 INFO L87 Difference]: Start difference. First operand 182 states and 268 transitions. Second operand 48 states. [2020-10-12 16:15:39,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:39,503 INFO L93 Difference]: Finished difference Result 191 states and 279 transitions. [2020-10-12 16:15:39,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 16:15:39,504 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 96 [2020-10-12 16:15:39,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:39,506 INFO L225 Difference]: With dead ends: 191 [2020-10-12 16:15:39,506 INFO L226 Difference]: Without dead ends: 186 [2020-10-12 16:15:39,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1004, Invalid=1446, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 16:15:39,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-12 16:15:39,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-10-12 16:15:39,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-12 16:15:39,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 274 transitions. [2020-10-12 16:15:39,514 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 274 transitions. Word has length 96 [2020-10-12 16:15:39,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:39,514 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 274 transitions. [2020-10-12 16:15:39,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 16:15:39,514 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 274 transitions. [2020-10-12 16:15:39,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-12 16:15:39,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:39,516 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:39,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 16:15:39,516 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:39,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:39,516 INFO L82 PathProgramCache]: Analyzing trace with hash -534564963, now seen corresponding path program 43 times [2020-10-12 16:15:39,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:39,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456245333] [2020-10-12 16:15:39,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:39,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:39,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:39,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:39,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:40,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:40,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-12 16:15:40,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:40,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1430 [2020-10-12 16:15:40,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:40,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 16:15:40,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:40,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-12 16:15:40,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:42,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:42,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:42,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:42,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:42,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:42,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:42,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:42,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:42,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:42,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:42,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:42,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1934 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:42,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456245333] [2020-10-12 16:15:42,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:42,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 16:15:42,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842734895] [2020-10-12 16:15:42,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 16:15:42,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:42,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 16:15:42,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1041, Invalid=1311, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:15:42,115 INFO L87 Difference]: Start difference. First operand 186 states and 274 transitions. Second operand 49 states. [2020-10-12 16:15:42,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:42,280 INFO L93 Difference]: Finished difference Result 195 states and 285 transitions. [2020-10-12 16:15:42,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 16:15:42,281 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 98 [2020-10-12 16:15:42,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:42,283 INFO L225 Difference]: With dead ends: 195 [2020-10-12 16:15:42,283 INFO L226 Difference]: Without dead ends: 190 [2020-10-12 16:15:42,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1049, Invalid=1501, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 16:15:42,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-12 16:15:42,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2020-10-12 16:15:42,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-12 16:15:42,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 280 transitions. [2020-10-12 16:15:42,289 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 280 transitions. Word has length 98 [2020-10-12 16:15:42,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:42,290 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 280 transitions. [2020-10-12 16:15:42,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 16:15:42,290 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 280 transitions. [2020-10-12 16:15:42,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-12 16:15:42,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:42,291 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:42,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 16:15:42,291 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:42,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:42,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1512783528, now seen corresponding path program 44 times [2020-10-12 16:15:42,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:42,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490326822] [2020-10-12 16:15:42,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:42,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:42,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:43,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:43,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:43,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-12 16:15:43,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:43,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1350 [2020-10-12 16:15:43,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:43,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-12 16:15:43,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:43,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-12 16:15:43,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:44,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:44,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:44,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:44,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:44,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:44,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:44,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:44,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:44,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:44,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:44,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2023 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:44,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490326822] [2020-10-12 16:15:44,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:44,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-12 16:15:44,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618957115] [2020-10-12 16:15:44,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-12 16:15:44,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:44,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-12 16:15:44,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1087, Invalid=1363, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 16:15:44,905 INFO L87 Difference]: Start difference. First operand 190 states and 280 transitions. Second operand 50 states. [2020-10-12 16:15:45,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:45,078 INFO L93 Difference]: Finished difference Result 199 states and 291 transitions. [2020-10-12 16:15:45,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-12 16:15:45,079 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 100 [2020-10-12 16:15:45,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:45,081 INFO L225 Difference]: With dead ends: 199 [2020-10-12 16:15:45,081 INFO L226 Difference]: Without dead ends: 194 [2020-10-12 16:15:45,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1095, Invalid=1557, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 16:15:45,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-12 16:15:45,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2020-10-12 16:15:45,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-12 16:15:45,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 286 transitions. [2020-10-12 16:15:45,089 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 286 transitions. Word has length 100 [2020-10-12 16:15:45,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:45,090 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 286 transitions. [2020-10-12 16:15:45,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-12 16:15:45,090 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 286 transitions. [2020-10-12 16:15:45,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-12 16:15:45,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:45,091 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:45,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 16:15:45,091 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:45,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:45,091 INFO L82 PathProgramCache]: Analyzing trace with hash -982986669, now seen corresponding path program 45 times [2020-10-12 16:15:45,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:45,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189879690] [2020-10-12 16:15:45,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:45,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:45,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:45,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:46,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:46,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:46,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-12 16:15:46,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:46,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1628 [2020-10-12 16:15:46,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:46,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-12 16:15:46,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:46,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-12 16:15:46,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:48,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:48,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:48,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:48,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:48,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:48,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:48,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:48,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:48,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:48,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:48,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:48,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189879690] [2020-10-12 16:15:48,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:48,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-12 16:15:48,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173275895] [2020-10-12 16:15:48,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-12 16:15:48,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:48,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-12 16:15:48,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1134, Invalid=1416, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 16:15:48,054 INFO L87 Difference]: Start difference. First operand 194 states and 286 transitions. Second operand 51 states. [2020-10-12 16:15:48,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:48,256 INFO L93 Difference]: Finished difference Result 203 states and 297 transitions. [2020-10-12 16:15:48,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-12 16:15:48,257 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 102 [2020-10-12 16:15:48,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:48,258 INFO L225 Difference]: With dead ends: 203 [2020-10-12 16:15:48,259 INFO L226 Difference]: Without dead ends: 198 [2020-10-12 16:15:48,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1142, Invalid=1614, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 16:15:48,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-12 16:15:48,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-10-12 16:15:48,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-12 16:15:48,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 292 transitions. [2020-10-12 16:15:48,269 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 292 transitions. Word has length 102 [2020-10-12 16:15:48,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:48,270 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 292 transitions. [2020-10-12 16:15:48,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-12 16:15:48,270 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 292 transitions. [2020-10-12 16:15:48,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-12 16:15:48,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:48,271 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:48,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 16:15:48,271 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:48,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:48,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1345653902, now seen corresponding path program 46 times [2020-10-12 16:15:48,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:48,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755145747] [2020-10-12 16:15:48,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:48,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:48,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:48,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:50,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:50,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-12 16:15:50,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:50,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2022 [2020-10-12 16:15:50,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:50,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-12 16:15:50,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:50,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-12 16:15:50,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:51,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:51,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:51,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:51,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:51,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:51,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:51,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:51,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:51,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:51,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:51,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2207 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:51,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755145747] [2020-10-12 16:15:51,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:51,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-12 16:15:51,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608951504] [2020-10-12 16:15:51,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-12 16:15:51,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:51,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-12 16:15:51,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1182, Invalid=1470, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 16:15:51,670 INFO L87 Difference]: Start difference. First operand 198 states and 292 transitions. Second operand 52 states. [2020-10-12 16:15:53,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:53,662 INFO L93 Difference]: Finished difference Result 207 states and 303 transitions. [2020-10-12 16:15:53,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-10-12 16:15:53,662 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 104 [2020-10-12 16:15:53,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:53,663 INFO L225 Difference]: With dead ends: 207 [2020-10-12 16:15:53,663 INFO L226 Difference]: Without dead ends: 202 [2020-10-12 16:15:53,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3536, Invalid=6364, Unknown=0, NotChecked=0, Total=9900 [2020-10-12 16:15:53,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-12 16:15:53,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2020-10-12 16:15:53,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-12 16:15:53,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 298 transitions. [2020-10-12 16:15:53,670 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 298 transitions. Word has length 104 [2020-10-12 16:15:53,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:53,670 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 298 transitions. [2020-10-12 16:15:53,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-12 16:15:53,670 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 298 transitions. [2020-10-12 16:15:53,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-12 16:15:53,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:53,671 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:53,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 16:15:53,672 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:53,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:53,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1491281417, now seen corresponding path program 47 times [2020-10-12 16:15:53,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:53,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388487489] [2020-10-12 16:15:53,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:53,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:53,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:54,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:55,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:55,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-12 16:15:55,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:55,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1672 [2020-10-12 16:15:55,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:55,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-12 16:15:55,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:55,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-12 16:15:55,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:56,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:56,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:56,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:56,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:56,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:56,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:56,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:56,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:56,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:56,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:56,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2302 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:15:56,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388487489] [2020-10-12 16:15:56,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:56,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-12 16:15:56,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147012847] [2020-10-12 16:15:56,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-12 16:15:56,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:56,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-12 16:15:56,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1231, Invalid=1525, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 16:15:56,759 INFO L87 Difference]: Start difference. First operand 202 states and 298 transitions. Second operand 53 states. [2020-10-12 16:15:56,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:56,940 INFO L93 Difference]: Finished difference Result 211 states and 309 transitions. [2020-10-12 16:15:56,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-12 16:15:56,941 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 106 [2020-10-12 16:15:56,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:56,943 INFO L225 Difference]: With dead ends: 211 [2020-10-12 16:15:56,943 INFO L226 Difference]: Without dead ends: 206 [2020-10-12 16:15:56,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1239, Invalid=1731, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 16:15:56,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-12 16:15:56,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2020-10-12 16:15:56,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-12 16:15:56,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 304 transitions. [2020-10-12 16:15:56,952 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 304 transitions. Word has length 106 [2020-10-12 16:15:56,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:56,952 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 304 transitions. [2020-10-12 16:15:56,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-12 16:15:56,952 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 304 transitions. [2020-10-12 16:15:56,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-12 16:15:56,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:56,953 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:56,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 16:15:56,954 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:56,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:56,954 INFO L82 PathProgramCache]: Analyzing trace with hash -294597436, now seen corresponding path program 48 times [2020-10-12 16:15:56,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:56,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116155057] [2020-10-12 16:15:56,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:56,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:57,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:58,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:58,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:58,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-12 16:15:58,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:15:58,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1861 [2020-10-12 16:15:58,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:58,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-12 16:15:58,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:58,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-12 16:15:58,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:00,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:00,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:00,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:00,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:00,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:00,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:00,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:00,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:00,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:00,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:00,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2399 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:16:00,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116155057] [2020-10-12 16:16:00,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:00,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-12 16:16:00,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452942150] [2020-10-12 16:16:00,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-12 16:16:00,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:00,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-12 16:16:00,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1281, Invalid=1581, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 16:16:00,287 INFO L87 Difference]: Start difference. First operand 206 states and 304 transitions. Second operand 54 states. [2020-10-12 16:16:00,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:00,482 INFO L93 Difference]: Finished difference Result 215 states and 315 transitions. [2020-10-12 16:16:00,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 16:16:00,483 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 108 [2020-10-12 16:16:00,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:00,484 INFO L225 Difference]: With dead ends: 215 [2020-10-12 16:16:00,484 INFO L226 Difference]: Without dead ends: 210 [2020-10-12 16:16:00,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1289, Invalid=1791, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 16:16:00,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-12 16:16:00,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2020-10-12 16:16:00,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-12 16:16:00,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 310 transitions. [2020-10-12 16:16:00,491 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 310 transitions. Word has length 108 [2020-10-12 16:16:00,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:00,492 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 310 transitions. [2020-10-12 16:16:00,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-12 16:16:00,492 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 310 transitions. [2020-10-12 16:16:00,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-12 16:16:00,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:00,493 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:00,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 16:16:00,493 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:00,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:00,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1462743231, now seen corresponding path program 49 times [2020-10-12 16:16:00,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:00,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453346808] [2020-10-12 16:16:00,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:00,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:00,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:01,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:02,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:02,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-12 16:16:02,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:16:02,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1696 [2020-10-12 16:16:02,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:02,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-12 16:16:02,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:02,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-12 16:16:02,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:03,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:03,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:03,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:03,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:03,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:03,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:03,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:03,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:03,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:03,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:03,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2498 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:16:03,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453346808] [2020-10-12 16:16:03,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:03,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-12 16:16:03,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842506249] [2020-10-12 16:16:03,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-12 16:16:03,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:03,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-12 16:16:03,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1332, Invalid=1638, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 16:16:03,745 INFO L87 Difference]: Start difference. First operand 210 states and 310 transitions. Second operand 55 states. [2020-10-12 16:16:03,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:03,917 INFO L93 Difference]: Finished difference Result 219 states and 321 transitions. [2020-10-12 16:16:03,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-12 16:16:03,918 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 110 [2020-10-12 16:16:03,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:03,920 INFO L225 Difference]: With dead ends: 219 [2020-10-12 16:16:03,920 INFO L226 Difference]: Without dead ends: 214 [2020-10-12 16:16:03,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1340, Invalid=1852, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 16:16:03,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-12 16:16:03,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-10-12 16:16:03,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-12 16:16:03,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 316 transitions. [2020-10-12 16:16:03,928 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 316 transitions. Word has length 110 [2020-10-12 16:16:03,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:03,929 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 316 transitions. [2020-10-12 16:16:03,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-12 16:16:03,929 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 316 transitions. [2020-10-12 16:16:03,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-12 16:16:03,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:03,930 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:03,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 16:16:03,930 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:03,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:03,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1949990406, now seen corresponding path program 50 times [2020-10-12 16:16:03,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:03,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345727951] [2020-10-12 16:16:03,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:03,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:03,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:04,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:05,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:05,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-12 16:16:05,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:16:05,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1825 [2020-10-12 16:16:05,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:05,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-12 16:16:05,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:05,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-12 16:16:05,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:07,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:07,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:07,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:07,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:07,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:07,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:07,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:07,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:07,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:07,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:07,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:07,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2599 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:16:07,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345727951] [2020-10-12 16:16:07,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:07,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-12 16:16:07,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270761098] [2020-10-12 16:16:07,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-12 16:16:07,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:07,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-12 16:16:07,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1384, Invalid=1696, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 16:16:07,357 INFO L87 Difference]: Start difference. First operand 214 states and 316 transitions. Second operand 56 states. [2020-10-12 16:16:07,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:07,562 INFO L93 Difference]: Finished difference Result 223 states and 327 transitions. [2020-10-12 16:16:07,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-12 16:16:07,562 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 112 [2020-10-12 16:16:07,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:07,564 INFO L225 Difference]: With dead ends: 223 [2020-10-12 16:16:07,564 INFO L226 Difference]: Without dead ends: 218 [2020-10-12 16:16:07,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1392, Invalid=1914, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 16:16:07,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-12 16:16:07,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2020-10-12 16:16:07,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-12 16:16:07,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 322 transitions. [2020-10-12 16:16:07,571 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 322 transitions. Word has length 112 [2020-10-12 16:16:07,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:07,571 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 322 transitions. [2020-10-12 16:16:07,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-12 16:16:07,571 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 322 transitions. [2020-10-12 16:16:07,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-12 16:16:07,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:07,572 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:07,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 16:16:07,573 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:07,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:07,573 INFO L82 PathProgramCache]: Analyzing trace with hash -232001419, now seen corresponding path program 51 times [2020-10-12 16:16:07,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:07,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464465556] [2020-10-12 16:16:07,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:07,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:07,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:08,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:09,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:09,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-12 16:16:09,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:16:09,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1950 [2020-10-12 16:16:09,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:09,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-12 16:16:09,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:09,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-12 16:16:09,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:11,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:11,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:11,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:11,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:11,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:11,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:11,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:11,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:11,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:11,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:11,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:11,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2702 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:16:11,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464465556] [2020-10-12 16:16:11,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:11,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-12 16:16:11,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797214307] [2020-10-12 16:16:11,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-12 16:16:11,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:11,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-12 16:16:11,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1437, Invalid=1755, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 16:16:11,154 INFO L87 Difference]: Start difference. First operand 218 states and 322 transitions. Second operand 57 states. [2020-10-12 16:16:11,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:11,394 INFO L93 Difference]: Finished difference Result 227 states and 333 transitions. [2020-10-12 16:16:11,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-12 16:16:11,394 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 114 [2020-10-12 16:16:11,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:11,396 INFO L225 Difference]: With dead ends: 227 [2020-10-12 16:16:11,396 INFO L226 Difference]: Without dead ends: 222 [2020-10-12 16:16:11,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1445, Invalid=1977, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 16:16:11,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-12 16:16:11,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2020-10-12 16:16:11,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-12 16:16:11,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 328 transitions. [2020-10-12 16:16:11,402 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 328 transitions. Word has length 114 [2020-10-12 16:16:11,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:11,402 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 328 transitions. [2020-10-12 16:16:11,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-12 16:16:11,403 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 328 transitions. [2020-10-12 16:16:11,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-12 16:16:11,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:11,404 INFO L422 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:11,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 16:16:11,404 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:11,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:11,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1487973424, now seen corresponding path program 52 times [2020-10-12 16:16:11,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:11,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989372382] [2020-10-12 16:16:11,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:11,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:11,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:11,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:12,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:13,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:13,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-12 16:16:13,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:16:13,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1893 [2020-10-12 16:16:13,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:13,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-12 16:16:13,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:13,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-12 16:16:13,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:15,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:15,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:15,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:15,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:15,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:15,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:15,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:15,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:15,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:15,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:15,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:15,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2807 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:16:15,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989372382] [2020-10-12 16:16:15,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:15,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-12 16:16:15,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723890611] [2020-10-12 16:16:15,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-12 16:16:15,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:15,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-12 16:16:15,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1491, Invalid=1815, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 16:16:15,045 INFO L87 Difference]: Start difference. First operand 222 states and 328 transitions. Second operand 58 states. [2020-10-12 16:16:15,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:15,214 INFO L93 Difference]: Finished difference Result 231 states and 339 transitions. [2020-10-12 16:16:15,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-12 16:16:15,215 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 116 [2020-10-12 16:16:15,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:15,217 INFO L225 Difference]: With dead ends: 231 [2020-10-12 16:16:15,217 INFO L226 Difference]: Without dead ends: 226 [2020-10-12 16:16:15,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1499, Invalid=2041, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 16:16:15,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-12 16:16:15,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2020-10-12 16:16:15,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-12 16:16:15,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 334 transitions. [2020-10-12 16:16:15,224 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 334 transitions. Word has length 116 [2020-10-12 16:16:15,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:15,224 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 334 transitions. [2020-10-12 16:16:15,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-12 16:16:15,225 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 334 transitions. [2020-10-12 16:16:15,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-12 16:16:15,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:15,226 INFO L422 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:15,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 16:16:15,226 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:15,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:15,226 INFO L82 PathProgramCache]: Analyzing trace with hash 821388587, now seen corresponding path program 53 times [2020-10-12 16:16:15,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:15,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997111307] [2020-10-12 16:16:15,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:15,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:15,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:16,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:17,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:17,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-12 16:16:17,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:16:17,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1984 [2020-10-12 16:16:17,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:17,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-12 16:16:17,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:17,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-12 16:16:17,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:18,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:18,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:18,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:18,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:18,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:18,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:18,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:18,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:18,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:18,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:18,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:18,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2914 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:16:18,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997111307] [2020-10-12 16:16:18,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:18,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-12 16:16:18,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195744298] [2020-10-12 16:16:18,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-12 16:16:18,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:18,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-12 16:16:18,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1546, Invalid=1876, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 16:16:18,964 INFO L87 Difference]: Start difference. First operand 226 states and 334 transitions. Second operand 59 states. [2020-10-12 16:16:21,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:21,410 INFO L93 Difference]: Finished difference Result 235 states and 345 transitions. [2020-10-12 16:16:21,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2020-10-12 16:16:21,410 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 118 [2020-10-12 16:16:21,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:21,413 INFO L225 Difference]: With dead ends: 235 [2020-10-12 16:16:21,413 INFO L226 Difference]: Without dead ends: 230 [2020-10-12 16:16:21,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4628, Invalid=8254, Unknown=0, NotChecked=0, Total=12882 [2020-10-12 16:16:21,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-12 16:16:21,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2020-10-12 16:16:21,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-12 16:16:21,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 340 transitions. [2020-10-12 16:16:21,420 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 340 transitions. Word has length 118 [2020-10-12 16:16:21,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:21,420 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 340 transitions. [2020-10-12 16:16:21,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-12 16:16:21,421 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 340 transitions. [2020-10-12 16:16:21,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-12 16:16:21,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:21,422 INFO L422 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:21,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 16:16:21,422 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:21,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:21,422 INFO L82 PathProgramCache]: Analyzing trace with hash 183487334, now seen corresponding path program 54 times [2020-10-12 16:16:21,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:21,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865365079] [2020-10-12 16:16:21,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:21,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:21,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:21,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:22,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:23,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:23,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-12 16:16:23,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:16:23,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2552 [2020-10-12 16:16:23,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:23,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-12 16:16:23,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:23,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-12 16:16:23,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:25,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:25,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:25,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:25,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:25,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:25,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:25,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:25,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:25,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:25,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:25,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:25,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:25,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3023 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:16:25,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865365079] [2020-10-12 16:16:25,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:25,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-12 16:16:25,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763356797] [2020-10-12 16:16:25,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-12 16:16:25,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:25,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-12 16:16:25,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1602, Invalid=1938, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 16:16:25,801 INFO L87 Difference]: Start difference. First operand 230 states and 340 transitions. Second operand 60 states. [2020-10-12 16:16:26,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:26,054 INFO L93 Difference]: Finished difference Result 239 states and 351 transitions. [2020-10-12 16:16:26,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-12 16:16:26,055 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 120 [2020-10-12 16:16:26,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:26,057 INFO L225 Difference]: With dead ends: 239 [2020-10-12 16:16:26,057 INFO L226 Difference]: Without dead ends: 234 [2020-10-12 16:16:26,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1610, Invalid=2172, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 16:16:26,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-12 16:16:26,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2020-10-12 16:16:26,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-12 16:16:26,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 346 transitions. [2020-10-12 16:16:26,064 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 346 transitions. Word has length 120 [2020-10-12 16:16:26,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:26,065 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 346 transitions. [2020-10-12 16:16:26,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-12 16:16:26,065 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 346 transitions. [2020-10-12 16:16:26,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-12 16:16:26,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:26,066 INFO L422 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:26,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 16:16:26,066 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:26,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:26,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1340706529, now seen corresponding path program 55 times [2020-10-12 16:16:26,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:26,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780555383] [2020-10-12 16:16:26,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:26,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:26,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:27,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:28,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:28,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-12 16:16:28,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:16:28,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2171 [2020-10-12 16:16:28,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:28,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-12 16:16:28,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:28,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-12 16:16:28,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:30,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:30,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:30,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:30,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:30,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:30,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:30,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:30,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:30,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:30,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:30,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:30,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:16:30,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780555383] [2020-10-12 16:16:30,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:30,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-12 16:16:30,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496198549] [2020-10-12 16:16:30,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-12 16:16:30,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:30,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-12 16:16:30,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1659, Invalid=2001, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 16:16:30,152 INFO L87 Difference]: Start difference. First operand 234 states and 346 transitions. Second operand 61 states. [2020-10-12 16:16:30,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:30,405 INFO L93 Difference]: Finished difference Result 243 states and 357 transitions. [2020-10-12 16:16:30,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-12 16:16:30,405 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 122 [2020-10-12 16:16:30,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:30,407 INFO L225 Difference]: With dead ends: 243 [2020-10-12 16:16:30,407 INFO L226 Difference]: Without dead ends: 238 [2020-10-12 16:16:30,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1667, Invalid=2239, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 16:16:30,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-12 16:16:30,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2020-10-12 16:16:30,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-12 16:16:30,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 352 transitions. [2020-10-12 16:16:30,415 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 352 transitions. Word has length 122 [2020-10-12 16:16:30,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:30,415 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 352 transitions. [2020-10-12 16:16:30,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-12 16:16:30,415 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 352 transitions. [2020-10-12 16:16:30,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-12 16:16:30,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:30,416 INFO L422 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:30,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-12 16:16:30,417 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:30,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:30,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1031823260, now seen corresponding path program 56 times [2020-10-12 16:16:30,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:30,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114310749] [2020-10-12 16:16:30,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:30,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:30,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:30,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:31,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:32,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:32,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-12 16:16:32,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:16:32,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2228 [2020-10-12 16:16:32,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:32,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-12 16:16:32,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:32,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-12 16:16:32,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:34,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:34,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:34,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:34,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:34,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:34,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:34,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:34,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:34,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:34,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:34,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3247 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:16:34,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114310749] [2020-10-12 16:16:34,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:34,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-12 16:16:34,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742113222] [2020-10-12 16:16:34,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-12 16:16:34,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:34,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-12 16:16:34,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1717, Invalid=2065, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 16:16:34,666 INFO L87 Difference]: Start difference. First operand 238 states and 352 transitions. Second operand 62 states. [2020-10-12 16:16:37,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:37,465 INFO L93 Difference]: Finished difference Result 247 states and 363 transitions. [2020-10-12 16:16:37,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-10-12 16:16:37,465 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 124 [2020-10-12 16:16:37,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:37,468 INFO L225 Difference]: With dead ends: 247 [2020-10-12 16:16:37,468 INFO L226 Difference]: Without dead ends: 242 [2020-10-12 16:16:37,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1821 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5141, Invalid=9139, Unknown=0, NotChecked=0, Total=14280 [2020-10-12 16:16:37,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-12 16:16:37,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2020-10-12 16:16:37,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-12 16:16:37,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 358 transitions. [2020-10-12 16:16:37,476 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 358 transitions. Word has length 124 [2020-10-12 16:16:37,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:37,476 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 358 transitions. [2020-10-12 16:16:37,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-12 16:16:37,477 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 358 transitions. [2020-10-12 16:16:37,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-12 16:16:37,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:37,478 INFO L422 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:37,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-12 16:16:37,478 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:37,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:37,478 INFO L82 PathProgramCache]: Analyzing trace with hash 547745175, now seen corresponding path program 57 times [2020-10-12 16:16:37,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:37,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784810540] [2020-10-12 16:16:37,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:37,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:37,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:38,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:39,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:39,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-12 16:16:39,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:16:39,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2499 [2020-10-12 16:16:39,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:39,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-12 16:16:39,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:39,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-12 16:16:39,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:42,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:42,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:42,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:42,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:42,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:42,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:42,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:42,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:42,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:42,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:42,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:42,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3362 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:16:42,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784810540] [2020-10-12 16:16:42,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:42,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-12 16:16:42,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098378906] [2020-10-12 16:16:42,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-12 16:16:42,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:42,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-12 16:16:42,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1776, Invalid=2130, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 16:16:42,020 INFO L87 Difference]: Start difference. First operand 242 states and 358 transitions. Second operand 63 states. [2020-10-12 16:16:42,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:42,232 INFO L93 Difference]: Finished difference Result 251 states and 369 transitions. [2020-10-12 16:16:42,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-12 16:16:42,232 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 126 [2020-10-12 16:16:42,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:42,234 INFO L225 Difference]: With dead ends: 251 [2020-10-12 16:16:42,234 INFO L226 Difference]: Without dead ends: 246 [2020-10-12 16:16:42,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1784, Invalid=2376, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 16:16:42,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-12 16:16:42,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2020-10-12 16:16:42,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-12 16:16:42,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 364 transitions. [2020-10-12 16:16:42,240 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 364 transitions. Word has length 126 [2020-10-12 16:16:42,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:42,240 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 364 transitions. [2020-10-12 16:16:42,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-12 16:16:42,241 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 364 transitions. [2020-10-12 16:16:42,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-12 16:16:42,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:42,242 INFO L422 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:42,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-12 16:16:42,242 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:42,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:42,242 INFO L82 PathProgramCache]: Analyzing trace with hash -794826542, now seen corresponding path program 58 times [2020-10-12 16:16:42,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:42,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496250211] [2020-10-12 16:16:42,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:42,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:42,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:43,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:44,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:44,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-12 16:16:44,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:16:44,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2515 [2020-10-12 16:16:44,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:44,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-12 16:16:44,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:44,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-12 16:16:44,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:46,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:46,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:46,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:46,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:46,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:46,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:46,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:46,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:46,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:46,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:46,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3479 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:16:46,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496250211] [2020-10-12 16:16:46,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:46,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-12 16:16:46,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496176525] [2020-10-12 16:16:46,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-12 16:16:46,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:46,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-12 16:16:46,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1836, Invalid=2196, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 16:16:46,869 INFO L87 Difference]: Start difference. First operand 246 states and 364 transitions. Second operand 64 states. [2020-10-12 16:16:49,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:49,840 INFO L93 Difference]: Finished difference Result 255 states and 375 transitions. [2020-10-12 16:16:49,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-10-12 16:16:49,841 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 128 [2020-10-12 16:16:49,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:49,843 INFO L225 Difference]: With dead ends: 255 [2020-10-12 16:16:49,843 INFO L226 Difference]: Without dead ends: 250 [2020-10-12 16:16:49,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1944 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=5498, Invalid=9754, Unknown=0, NotChecked=0, Total=15252 [2020-10-12 16:16:49,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-12 16:16:49,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2020-10-12 16:16:49,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-12 16:16:49,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 370 transitions. [2020-10-12 16:16:49,850 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 370 transitions. Word has length 128 [2020-10-12 16:16:49,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:49,850 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 370 transitions. [2020-10-12 16:16:49,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-12 16:16:49,850 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 370 transitions. [2020-10-12 16:16:49,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-12 16:16:49,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:49,851 INFO L422 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:49,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-12 16:16:49,852 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:49,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:49,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1778909517, now seen corresponding path program 59 times [2020-10-12 16:16:49,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:49,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297151255] [2020-10-12 16:16:49,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:49,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:49,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:51,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:52,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:52,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-12 16:16:52,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:16:52,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2502 [2020-10-12 16:16:52,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:52,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-12 16:16:52,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:52,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-12 16:16:52,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:54,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:54,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:54,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:54,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:54,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:54,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:54,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:54,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:54,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:54,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:54,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3598 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:16:54,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297151255] [2020-10-12 16:16:54,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:54,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-12 16:16:54,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139490776] [2020-10-12 16:16:54,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-12 16:16:54,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:54,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-12 16:16:54,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1897, Invalid=2263, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 16:16:54,562 INFO L87 Difference]: Start difference. First operand 250 states and 370 transitions. Second operand 65 states. [2020-10-12 16:16:54,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:54,804 INFO L93 Difference]: Finished difference Result 259 states and 381 transitions. [2020-10-12 16:16:54,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-12 16:16:54,805 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 130 [2020-10-12 16:16:54,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:54,807 INFO L225 Difference]: With dead ends: 259 [2020-10-12 16:16:54,807 INFO L226 Difference]: Without dead ends: 254 [2020-10-12 16:16:54,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1905, Invalid=2517, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 16:16:54,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-12 16:16:54,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2020-10-12 16:16:54,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-12 16:16:54,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 376 transitions. [2020-10-12 16:16:54,813 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 376 transitions. Word has length 130 [2020-10-12 16:16:54,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:54,814 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 376 transitions. [2020-10-12 16:16:54,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-12 16:16:54,814 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 376 transitions. [2020-10-12 16:16:54,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-12 16:16:54,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:54,815 INFO L422 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:54,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-12 16:16:54,815 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:54,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:54,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1238099720, now seen corresponding path program 60 times [2020-10-12 16:16:54,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:54,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138674671] [2020-10-12 16:16:54,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:54,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:54,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:55,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:57,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:57,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-12 16:16:57,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:16:57,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2604 [2020-10-12 16:16:57,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:57,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-12 16:16:57,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:57,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-12 16:16:57,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:59,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:59,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:59,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:59,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:59,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:59,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:59,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:59,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:59,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:59,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:59,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:59,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3719 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:16:59,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138674671] [2020-10-12 16:16:59,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:59,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-12 16:16:59,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741264447] [2020-10-12 16:16:59,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-12 16:16:59,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:59,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-12 16:16:59,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1959, Invalid=2331, Unknown=0, NotChecked=0, Total=4290 [2020-10-12 16:16:59,746 INFO L87 Difference]: Start difference. First operand 254 states and 376 transitions. Second operand 66 states. [2020-10-12 16:17:02,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:02,914 INFO L93 Difference]: Finished difference Result 263 states and 387 transitions. [2020-10-12 16:17:02,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-10-12 16:17:02,915 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 132 [2020-10-12 16:17:02,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:02,917 INFO L225 Difference]: With dead ends: 263 [2020-10-12 16:17:02,917 INFO L226 Difference]: Without dead ends: 258 [2020-10-12 16:17:02,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2071 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5867, Invalid=10389, Unknown=0, NotChecked=0, Total=16256 [2020-10-12 16:17:02,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-12 16:17:02,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2020-10-12 16:17:02,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-12 16:17:02,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 382 transitions. [2020-10-12 16:17:02,926 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 382 transitions. Word has length 132 [2020-10-12 16:17:02,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:02,926 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 382 transitions. [2020-10-12 16:17:02,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-12 16:17:02,927 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 382 transitions. [2020-10-12 16:17:02,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-12 16:17:02,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:02,928 INFO L422 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:02,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-12 16:17:02,928 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:02,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:02,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1210927619, now seen corresponding path program 61 times [2020-10-12 16:17:02,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:02,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753107990] [2020-10-12 16:17:02,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:02,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:03,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:04,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:05,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:05,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-12 16:17:05,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:17:05,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2816 [2020-10-12 16:17:05,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:05,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-12 16:17:05,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:05,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-12 16:17:05,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:08,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:08,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:08,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:08,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:08,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:08,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:08,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:08,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:08,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:08,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:08,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:08,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:08,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3842 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:17:08,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753107990] [2020-10-12 16:17:08,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:08,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-12 16:17:08,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830825222] [2020-10-12 16:17:08,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-12 16:17:08,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:08,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-12 16:17:08,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2022, Invalid=2400, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 16:17:08,052 INFO L87 Difference]: Start difference. First operand 258 states and 382 transitions. Second operand 67 states. [2020-10-12 16:17:11,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:11,435 INFO L93 Difference]: Finished difference Result 267 states and 393 transitions. [2020-10-12 16:17:11,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2020-10-12 16:17:11,436 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 134 [2020-10-12 16:17:11,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:11,438 INFO L225 Difference]: With dead ends: 267 [2020-10-12 16:17:11,438 INFO L226 Difference]: Without dead ends: 262 [2020-10-12 16:17:11,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2136 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=6056, Invalid=10714, Unknown=0, NotChecked=0, Total=16770 [2020-10-12 16:17:11,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-12 16:17:11,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2020-10-12 16:17:11,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-12 16:17:11,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 388 transitions. [2020-10-12 16:17:11,445 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 388 transitions. Word has length 134 [2020-10-12 16:17:11,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:11,445 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 388 transitions. [2020-10-12 16:17:11,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-12 16:17:11,445 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 388 transitions. [2020-10-12 16:17:11,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-12 16:17:11,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:11,446 INFO L422 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:11,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-12 16:17:11,446 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:11,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:11,447 INFO L82 PathProgramCache]: Analyzing trace with hash 868342334, now seen corresponding path program 62 times [2020-10-12 16:17:11,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:11,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438980373] [2020-10-12 16:17:11,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:11,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:11,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:11,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:12,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:14,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:14,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-12 16:17:14,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:17:14,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2945 [2020-10-12 16:17:14,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:14,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-12 16:17:14,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:14,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-10-12 16:17:14,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:16,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:16,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:16,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:16,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:16,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:16,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:17:16,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:16,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:16,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:16,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:16,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:16,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3967 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:17:16,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438980373] [2020-10-12 16:17:16,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:16,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-12 16:17:16,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154945308] [2020-10-12 16:17:16,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-12 16:17:16,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:16,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-12 16:17:16,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2086, Invalid=2470, Unknown=0, NotChecked=0, Total=4556 [2020-10-12 16:17:16,899 INFO L87 Difference]: Start difference. First operand 262 states and 388 transitions. Second operand 68 states. [2020-10-12 16:17:20,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:20,574 INFO L93 Difference]: Finished difference Result 271 states and 399 transitions. [2020-10-12 16:17:20,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2020-10-12 16:17:20,575 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 136 [2020-10-12 16:17:20,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:20,577 INFO L225 Difference]: With dead ends: 271 [2020-10-12 16:17:20,577 INFO L226 Difference]: Without dead ends: 266 [2020-10-12 16:17:20,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=6248, Invalid=11044, Unknown=0, NotChecked=0, Total=17292 [2020-10-12 16:17:20,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-12 16:17:20,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2020-10-12 16:17:20,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-12 16:17:20,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 394 transitions. [2020-10-12 16:17:20,583 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 394 transitions. Word has length 136 [2020-10-12 16:17:20,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:20,584 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 394 transitions. [2020-10-12 16:17:20,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-12 16:17:20,584 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 394 transitions. [2020-10-12 16:17:20,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-12 16:17:20,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:20,585 INFO L422 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:20,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-12 16:17:20,585 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:20,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:20,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1938602055, now seen corresponding path program 63 times [2020-10-12 16:17:20,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:20,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486532071] [2020-10-12 16:17:20,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:20,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:20,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:21,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:23,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:23,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-12 16:17:23,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:17:23,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3180 [2020-10-12 16:17:23,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:23,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-12 16:17:23,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:23,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 135 [2020-10-12 16:17:23,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:26,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:26,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:26,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:26,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:26,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:26,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:17:26,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:26,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:26,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:26,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:26,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4094 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:17:26,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486532071] [2020-10-12 16:17:26,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:26,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-12 16:17:26,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627340609] [2020-10-12 16:17:26,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-12 16:17:26,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:26,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-12 16:17:26,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2151, Invalid=2541, Unknown=0, NotChecked=0, Total=4692 [2020-10-12 16:17:26,444 INFO L87 Difference]: Start difference. First operand 266 states and 394 transitions. Second operand 69 states. [2020-10-12 16:17:29,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:29,919 INFO L93 Difference]: Finished difference Result 275 states and 405 transitions. [2020-10-12 16:17:29,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2020-10-12 16:17:29,920 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 138 [2020-10-12 16:17:29,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:29,922 INFO L225 Difference]: With dead ends: 275 [2020-10-12 16:17:29,922 INFO L226 Difference]: Without dead ends: 270 [2020-10-12 16:17:29,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2269 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=6443, Invalid=11379, Unknown=0, NotChecked=0, Total=17822 [2020-10-12 16:17:29,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-12 16:17:29,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2020-10-12 16:17:29,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-12 16:17:29,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 400 transitions. [2020-10-12 16:17:29,929 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 400 transitions. Word has length 138 [2020-10-12 16:17:29,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:29,929 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 400 transitions. [2020-10-12 16:17:29,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-12 16:17:29,929 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 400 transitions. [2020-10-12 16:17:29,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-12 16:17:29,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:29,930 INFO L422 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:29,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-12 16:17:29,931 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:29,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:29,931 INFO L82 PathProgramCache]: Analyzing trace with hash 2122269300, now seen corresponding path program 64 times [2020-10-12 16:17:29,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:29,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062084810] [2020-10-12 16:17:29,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:29,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:29,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:30,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:30,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:33,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:33,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-12 16:17:33,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:17:33,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3216 [2020-10-12 16:17:33,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:33,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-12 16:17:33,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:33,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-12 16:17:33,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:35,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:35,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:35,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:35,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:35,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:35,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:35,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:35,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:35,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:35,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:35,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:35,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4223 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:17:35,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062084810] [2020-10-12 16:17:35,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:35,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-12 16:17:35,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651869234] [2020-10-12 16:17:35,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-12 16:17:35,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:35,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-12 16:17:35,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2217, Invalid=2613, Unknown=0, NotChecked=0, Total=4830 [2020-10-12 16:17:35,757 INFO L87 Difference]: Start difference. First operand 270 states and 400 transitions. Second operand 70 states. [2020-10-12 16:17:36,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:36,066 INFO L93 Difference]: Finished difference Result 279 states and 411 transitions. [2020-10-12 16:17:36,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-12 16:17:36,067 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 140 [2020-10-12 16:17:36,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:36,069 INFO L225 Difference]: With dead ends: 279 [2020-10-12 16:17:36,069 INFO L226 Difference]: Without dead ends: 274 [2020-10-12 16:17:36,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2225, Invalid=2887, Unknown=0, NotChecked=0, Total=5112 [2020-10-12 16:17:36,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-12 16:17:36,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2020-10-12 16:17:36,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-12 16:17:36,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 406 transitions. [2020-10-12 16:17:36,076 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 406 transitions. Word has length 140 [2020-10-12 16:17:36,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:36,076 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 406 transitions. [2020-10-12 16:17:36,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-12 16:17:36,076 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 406 transitions. [2020-10-12 16:17:36,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-12 16:17:36,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:36,078 INFO L422 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:36,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-12 16:17:36,078 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:36,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:36,078 INFO L82 PathProgramCache]: Analyzing trace with hash 494369391, now seen corresponding path program 65 times [2020-10-12 16:17:36,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:36,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226681232] [2020-10-12 16:17:36,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:36,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:36,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:36,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:37,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:39,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:39,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-12 16:17:39,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:17:39,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3220 [2020-10-12 16:17:39,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:39,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-12 16:17:39,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:39,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-10-12 16:17:39,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:42,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:42,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:42,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:42,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:42,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:42,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:42,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:42,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:42,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:42,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:42,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4354 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:17:42,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226681232] [2020-10-12 16:17:42,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:42,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-12 16:17:42,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217194922] [2020-10-12 16:17:42,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-12 16:17:42,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:42,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-12 16:17:42,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2284, Invalid=2686, Unknown=0, NotChecked=0, Total=4970 [2020-10-12 16:17:42,125 INFO L87 Difference]: Start difference. First operand 274 states and 406 transitions. Second operand 71 states. [2020-10-12 16:17:42,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:42,508 INFO L93 Difference]: Finished difference Result 283 states and 417 transitions. [2020-10-12 16:17:42,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-12 16:17:42,509 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 142 [2020-10-12 16:17:42,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:42,511 INFO L225 Difference]: With dead ends: 283 [2020-10-12 16:17:42,511 INFO L226 Difference]: Without dead ends: 278 [2020-10-12 16:17:42,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2292, Invalid=2964, Unknown=0, NotChecked=0, Total=5256 [2020-10-12 16:17:42,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-12 16:17:42,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2020-10-12 16:17:42,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-12 16:17:42,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 412 transitions. [2020-10-12 16:17:42,517 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 412 transitions. Word has length 142 [2020-10-12 16:17:42,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:42,517 INFO L479 AbstractCegarLoop]: Abstraction has 278 states and 412 transitions. [2020-10-12 16:17:42,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-12 16:17:42,517 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 412 transitions. [2020-10-12 16:17:42,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-12 16:17:42,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:42,518 INFO L422 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:42,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-12 16:17:42,519 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:42,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:42,519 INFO L82 PathProgramCache]: Analyzing trace with hash -549347414, now seen corresponding path program 66 times [2020-10-12 16:17:42,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:42,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108148091] [2020-10-12 16:17:42,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:42,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:42,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:44,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:45,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:45,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-12 16:17:45,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:17:45,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3415 [2020-10-12 16:17:45,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:45,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-12 16:17:45,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:45,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-12 16:17:45,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:48,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:48,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:48,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:48,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:48,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:48,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:48,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:48,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:48,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:48,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:48,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:48,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:48,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4487 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:17:48,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108148091] [2020-10-12 16:17:48,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:48,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-12 16:17:48,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450913046] [2020-10-12 16:17:48,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-12 16:17:48,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:48,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-12 16:17:48,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2352, Invalid=2760, Unknown=0, NotChecked=0, Total=5112 [2020-10-12 16:17:48,833 INFO L87 Difference]: Start difference. First operand 278 states and 412 transitions. Second operand 72 states. [2020-10-12 16:17:49,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:49,140 INFO L93 Difference]: Finished difference Result 287 states and 423 transitions. [2020-10-12 16:17:49,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-12 16:17:49,140 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 144 [2020-10-12 16:17:49,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:49,142 INFO L225 Difference]: With dead ends: 287 [2020-10-12 16:17:49,143 INFO L226 Difference]: Without dead ends: 282 [2020-10-12 16:17:49,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2360, Invalid=3042, Unknown=0, NotChecked=0, Total=5402 [2020-10-12 16:17:49,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-12 16:17:49,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2020-10-12 16:17:49,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-12 16:17:49,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 418 transitions. [2020-10-12 16:17:49,149 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 418 transitions. Word has length 144 [2020-10-12 16:17:49,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:49,149 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 418 transitions. [2020-10-12 16:17:49,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-12 16:17:49,150 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 418 transitions. [2020-10-12 16:17:49,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-12 16:17:49,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:49,150 INFO L422 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:49,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-12 16:17:49,151 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:49,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:49,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1461150245, now seen corresponding path program 67 times [2020-10-12 16:17:49,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:49,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694884005] [2020-10-12 16:17:49,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:49,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:49,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:49,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:50,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:52,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:52,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-12 16:17:52,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:17:52,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3484 [2020-10-12 16:17:52,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:52,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 72 [2020-10-12 16:17:52,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:52,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-12 16:17:52,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:55,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:55,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:55,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:55,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:55,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:55,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:55,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:55,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:55,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:55,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:55,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:55,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4622 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:17:55,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694884005] [2020-10-12 16:17:55,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:55,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-12 16:17:55,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277505052] [2020-10-12 16:17:55,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-12 16:17:55,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:55,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-12 16:17:55,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2421, Invalid=2835, Unknown=0, NotChecked=0, Total=5256 [2020-10-12 16:17:55,531 INFO L87 Difference]: Start difference. First operand 282 states and 418 transitions. Second operand 73 states. [2020-10-12 16:17:59,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:59,682 INFO L93 Difference]: Finished difference Result 291 states and 429 transitions. [2020-10-12 16:17:59,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2020-10-12 16:17:59,683 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 146 [2020-10-12 16:17:59,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:59,685 INFO L225 Difference]: With dead ends: 291 [2020-10-12 16:17:59,685 INFO L226 Difference]: Without dead ends: 286 [2020-10-12 16:17:59,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2547 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=7253, Invalid=12769, Unknown=0, NotChecked=0, Total=20022 [2020-10-12 16:17:59,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-12 16:17:59,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2020-10-12 16:17:59,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-10-12 16:17:59,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 424 transitions. [2020-10-12 16:17:59,693 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 424 transitions. Word has length 146 [2020-10-12 16:17:59,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:59,693 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 424 transitions. [2020-10-12 16:17:59,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-12 16:17:59,693 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 424 transitions. [2020-10-12 16:17:59,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-12 16:17:59,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:59,694 INFO L422 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:59,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-12 16:17:59,695 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:59,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:59,695 INFO L82 PathProgramCache]: Analyzing trace with hash 814117344, now seen corresponding path program 68 times [2020-10-12 16:17:59,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:59,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204816508] [2020-10-12 16:17:59,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:59,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:59,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:59,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:01,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:03,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:03,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-12 16:18:03,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:18:03,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3690 [2020-10-12 16:18:03,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:03,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-12 16:18:03,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:03,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 145 [2020-10-12 16:18:03,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:06,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:06,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:06,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:06,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:06,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:06,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:06,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:06,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:06,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:06,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:06,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4759 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:18:06,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204816508] [2020-10-12 16:18:06,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:06,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-12 16:18:06,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066763345] [2020-10-12 16:18:06,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-12 16:18:06,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:06,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-12 16:18:06,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2491, Invalid=2911, Unknown=0, NotChecked=0, Total=5402 [2020-10-12 16:18:06,492 INFO L87 Difference]: Start difference. First operand 286 states and 424 transitions. Second operand 74 states. [2020-10-12 16:18:06,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:06,891 INFO L93 Difference]: Finished difference Result 295 states and 435 transitions. [2020-10-12 16:18:06,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-12 16:18:06,892 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 148 [2020-10-12 16:18:06,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:06,894 INFO L225 Difference]: With dead ends: 295 [2020-10-12 16:18:06,894 INFO L226 Difference]: Without dead ends: 290 [2020-10-12 16:18:06,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2499, Invalid=3201, Unknown=0, NotChecked=0, Total=5700 [2020-10-12 16:18:06,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-12 16:18:06,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2020-10-12 16:18:06,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-10-12 16:18:06,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 430 transitions. [2020-10-12 16:18:06,902 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 430 transitions. Word has length 148 [2020-10-12 16:18:06,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:06,903 INFO L479 AbstractCegarLoop]: Abstraction has 290 states and 430 transitions. [2020-10-12 16:18:06,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-12 16:18:06,903 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 430 transitions. [2020-10-12 16:18:06,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-12 16:18:06,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:06,904 INFO L422 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:06,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-12 16:18:06,904 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:06,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:06,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1785757403, now seen corresponding path program 69 times [2020-10-12 16:18:06,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:06,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957965990] [2020-10-12 16:18:06,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:06,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:07,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:08,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:10,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:10,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-12 16:18:10,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:18:10,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3759 [2020-10-12 16:18:10,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:10,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 74 [2020-10-12 16:18:10,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:10,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 147 [2020-10-12 16:18:10,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:13,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:13,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:13,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:13,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:13,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:13,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:13,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:13,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:13,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:13,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:13,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4898 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:18:13,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957965990] [2020-10-12 16:18:13,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:13,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-12 16:18:13,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817427028] [2020-10-12 16:18:13,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-12 16:18:13,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:13,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-12 16:18:13,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2562, Invalid=2988, Unknown=0, NotChecked=0, Total=5550 [2020-10-12 16:18:13,736 INFO L87 Difference]: Start difference. First operand 290 states and 430 transitions. Second operand 75 states. [2020-10-12 16:18:18,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:18,148 INFO L93 Difference]: Finished difference Result 299 states and 441 transitions. [2020-10-12 16:18:18,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2020-10-12 16:18:18,149 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 150 [2020-10-12 16:18:18,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:18,151 INFO L225 Difference]: With dead ends: 299 [2020-10-12 16:18:18,151 INFO L226 Difference]: Without dead ends: 294 [2020-10-12 16:18:18,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2692 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=7676, Invalid=13494, Unknown=0, NotChecked=0, Total=21170 [2020-10-12 16:18:18,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-12 16:18:18,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2020-10-12 16:18:18,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-12 16:18:18,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 436 transitions. [2020-10-12 16:18:18,157 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 436 transitions. Word has length 150 [2020-10-12 16:18:18,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:18,158 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 436 transitions. [2020-10-12 16:18:18,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-12 16:18:18,158 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 436 transitions. [2020-10-12 16:18:18,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-12 16:18:18,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:18,159 INFO L422 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:18,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-12 16:18:18,159 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:18,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:18,160 INFO L82 PathProgramCache]: Analyzing trace with hash -771016426, now seen corresponding path program 70 times [2020-10-12 16:18:18,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:18,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762069399] [2020-10-12 16:18:18,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:18,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:18,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:18,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:19,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:22,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:22,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-12 16:18:22,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:18:22,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4070 [2020-10-12 16:18:22,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:22,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 75 [2020-10-12 16:18:22,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:22,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-12 16:18:22,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:25,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:25,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:25,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:25,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:25,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:25,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:25,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:25,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:25,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:25,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:25,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5039 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:18:25,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762069399] [2020-10-12 16:18:25,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:25,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-12 16:18:25,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099726360] [2020-10-12 16:18:25,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-12 16:18:25,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:25,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-12 16:18:25,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2634, Invalid=3066, Unknown=0, NotChecked=0, Total=5700 [2020-10-12 16:18:25,506 INFO L87 Difference]: Start difference. First operand 294 states and 436 transitions. Second operand 76 states. [2020-10-12 16:18:25,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:25,869 INFO L93 Difference]: Finished difference Result 303 states and 447 transitions. [2020-10-12 16:18:25,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-12 16:18:25,870 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 152 [2020-10-12 16:18:25,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:25,872 INFO L225 Difference]: With dead ends: 303 [2020-10-12 16:18:25,872 INFO L226 Difference]: Without dead ends: 298 [2020-10-12 16:18:25,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2642, Invalid=3364, Unknown=0, NotChecked=0, Total=6006 [2020-10-12 16:18:25,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-12 16:18:25,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2020-10-12 16:18:25,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-10-12 16:18:25,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 442 transitions. [2020-10-12 16:18:25,879 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 442 transitions. Word has length 152 [2020-10-12 16:18:25,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:25,879 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 442 transitions. [2020-10-12 16:18:25,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-12 16:18:25,879 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 442 transitions. [2020-10-12 16:18:25,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-12 16:18:25,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:25,880 INFO L422 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:25,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-12 16:18:25,880 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:25,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:25,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1109372783, now seen corresponding path program 71 times [2020-10-12 16:18:25,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:25,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329678246] [2020-10-12 16:18:25,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:25,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:25,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:27,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:29,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:29,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-12 16:18:29,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:18:29,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4108 [2020-10-12 16:18:29,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:29,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 76 [2020-10-12 16:18:29,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:29,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 151 [2020-10-12 16:18:29,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:33,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:33,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:33,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:33,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:33,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:33,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:33,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:33,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:33,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:33,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:33,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5182 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:18:33,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329678246] [2020-10-12 16:18:33,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:33,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-10-12 16:18:33,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427349936] [2020-10-12 16:18:33,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-10-12 16:18:33,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:33,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-10-12 16:18:33,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2707, Invalid=3145, Unknown=0, NotChecked=0, Total=5852 [2020-10-12 16:18:33,286 INFO L87 Difference]: Start difference. First operand 298 states and 442 transitions. Second operand 77 states. [2020-10-12 16:18:38,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:38,032 INFO L93 Difference]: Finished difference Result 307 states and 453 transitions. [2020-10-12 16:18:38,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2020-10-12 16:18:38,033 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 154 [2020-10-12 16:18:38,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:38,035 INFO L225 Difference]: With dead ends: 307 [2020-10-12 16:18:38,035 INFO L226 Difference]: Without dead ends: 302 [2020-10-12 16:18:38,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2841 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=8111, Invalid=14239, Unknown=0, NotChecked=0, Total=22350 [2020-10-12 16:18:38,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-10-12 16:18:38,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2020-10-12 16:18:38,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-10-12 16:18:38,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 448 transitions. [2020-10-12 16:18:38,044 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 448 transitions. Word has length 154 [2020-10-12 16:18:38,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:38,044 INFO L479 AbstractCegarLoop]: Abstraction has 302 states and 448 transitions. [2020-10-12 16:18:38,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-10-12 16:18:38,044 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 448 transitions. [2020-10-12 16:18:38,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-12 16:18:38,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:38,045 INFO L422 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:38,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-12 16:18:38,046 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:38,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:38,046 INFO L82 PathProgramCache]: Analyzing trace with hash 147682636, now seen corresponding path program 72 times [2020-10-12 16:18:38,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:38,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402448844] [2020-10-12 16:18:38,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:38,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:38,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:40,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:42,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:42,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-12 16:18:42,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:18:42,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4375 [2020-10-12 16:18:42,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:42,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 77 [2020-10-12 16:18:42,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:42,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-10-12 16:18:42,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0