/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/in-de41.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:10:44,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:10:44,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:10:44,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:10:44,908 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:10:44,909 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:10:44,911 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:10:44,912 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:10:44,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:10:44,915 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:10:44,916 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:10:44,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:10:44,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:10:44,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:10:44,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:10:44,920 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:10:44,921 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:10:44,922 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:10:44,924 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:10:44,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:10:44,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:10:44,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:10:44,929 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:10:44,930 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:10:44,932 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:10:44,933 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:10:44,933 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:10:44,934 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:10:44,934 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:10:44,935 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:10:44,935 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:10:44,936 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:10:44,937 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:10:44,937 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:10:44,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:10:44,939 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:10:44,939 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:10:44,939 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:10:44,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:10:44,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:10:44,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:10:44,942 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 16:10:44,965 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:10:44,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:10:44,967 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:10:44,967 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:10:44,967 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:10:44,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:10:44,968 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:10:44,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:10:44,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:10:44,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:10:44,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:10:44,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:10:44,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:10:44,969 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:10:44,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:10:44,970 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:10:44,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:10:44,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:10:44,970 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:10:44,970 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:10:44,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:10:44,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:10:44,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:10:44,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:10:44,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:10:44,971 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:10:44,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:10:44,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:10:44,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:10:44,972 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 16:10:45,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:10:45,292 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:10:45,295 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:10:45,297 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:10:45,297 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:10:45,298 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de41.c [2020-10-12 16:10:45,359 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/54765b840/1f065deb275143c2bb9c943bb38c3962/FLAGa9d722e10 [2020-10-12 16:10:45,801 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:10:45,802 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de41.c [2020-10-12 16:10:45,808 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/54765b840/1f065deb275143c2bb9c943bb38c3962/FLAGa9d722e10 [2020-10-12 16:10:46,204 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/54765b840/1f065deb275143c2bb9c943bb38c3962 [2020-10-12 16:10:46,213 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:10:46,215 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:10:46,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:10:46,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:10:46,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:10:46,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:10:46" (1/1) ... [2020-10-12 16:10:46,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@770ea115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:46, skipping insertion in model container [2020-10-12 16:10:46,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:10:46" (1/1) ... [2020-10-12 16:10:46,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:10:46,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:10:46,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:10:46,441 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:10:46,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:10:46,471 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:10:46,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:46 WrapperNode [2020-10-12 16:10:46,472 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:10:46,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:10:46,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:10:46,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:10:46,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:46" (1/1) ... [2020-10-12 16:10:46,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:46" (1/1) ... [2020-10-12 16:10:46,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:46" (1/1) ... [2020-10-12 16:10:46,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:46" (1/1) ... [2020-10-12 16:10:46,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:46" (1/1) ... [2020-10-12 16:10:46,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:46" (1/1) ... [2020-10-12 16:10:46,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:46" (1/1) ... [2020-10-12 16:10:46,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:10:46,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:10:46,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:10:46,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:10:46,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:46" (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 16:10:46,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:10:46,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:10:46,650 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:10:46,650 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:10:46,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:10:46,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-12 16:10:46,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:10:46,652 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:10:46,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:10:46,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:10:46,856 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:10:46,857 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-12 16:10:46,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:10:46 BoogieIcfgContainer [2020-10-12 16:10:46,861 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:10:46,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:10:46,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:10:46,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:10:46,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:10:46" (1/3) ... [2020-10-12 16:10:46,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@689b616e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:10:46, skipping insertion in model container [2020-10-12 16:10:46,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:10:46" (2/3) ... [2020-10-12 16:10:46,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@689b616e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:10:46, skipping insertion in model container [2020-10-12 16:10:46,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:10:46" (3/3) ... [2020-10-12 16:10:46,869 INFO L109 eAbstractionObserver]: Analyzing ICFG in-de41.c [2020-10-12 16:10:46,879 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:10:46,886 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:10:46,901 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:10:46,922 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:10:46,923 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:10:46,923 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:10:46,923 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:10:46,923 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:10:46,923 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:10:46,923 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:10:46,924 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:10:46,939 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-12 16:10:46,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 16:10:46,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:46,946 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:46,946 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:46,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:46,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1870796656, now seen corresponding path program 1 times [2020-10-12 16:10:46,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:46,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580207166] [2020-10-12 16:10:46,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:47,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:47,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:47,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:47,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 16:10:47,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:47,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 241 [2020-10-12 16:10:47,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:47,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:10:47,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:47,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:10:47,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:10:47,489 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2020-10-12 16:10:47,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:47,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:47,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:47,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:47,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:47,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:10:47,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:47,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:47,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:47,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:47,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:10:47,608 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 16:10:47,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580207166] [2020-10-12 16:10:47,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:10:47,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 16:10:47,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539843614] [2020-10-12 16:10:47,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:10:47,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:47,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:10:47,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:10:47,637 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-10-12 16:10:47,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:47,758 INFO L93 Difference]: Finished difference Result 51 states and 76 transitions. [2020-10-12 16:10:47,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:10:47,760 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-12 16:10:47,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:47,769 INFO L225 Difference]: With dead ends: 51 [2020-10-12 16:10:47,769 INFO L226 Difference]: Without dead ends: 20 [2020-10-12 16:10:47,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:10:47,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-12 16:10:47,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-12 16:10:47,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-12 16:10:47,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2020-10-12 16:10:47,816 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 14 [2020-10-12 16:10:47,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:47,817 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-12 16:10:47,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:10:47,817 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2020-10-12 16:10:47,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 16:10:47,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:47,818 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:47,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:10:47,819 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:47,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:47,820 INFO L82 PathProgramCache]: Analyzing trace with hash 2081142662, now seen corresponding path program 1 times [2020-10-12 16:10:47,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:47,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35375525] [2020-10-12 16:10:47,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:47,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:47,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:48,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:48,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 16:10:48,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:48,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-12 16:10:48,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:48,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:10:48,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:48,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:10:48,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:10:48,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:48,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:48,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:48,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:48,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:48,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:48,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:48,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:48,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:48,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:48,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:48,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:10:48,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:48,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35375525] [2020-10-12 16:10:48,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:48,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:10:48,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581494232] [2020-10-12 16:10:48,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:10:48,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:48,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:10:48,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:10:48,251 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand 7 states. [2020-10-12 16:10:48,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:48,364 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2020-10-12 16:10:48,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:10:48,365 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-12 16:10:48,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:48,367 INFO L225 Difference]: With dead ends: 38 [2020-10-12 16:10:48,368 INFO L226 Difference]: Without dead ends: 26 [2020-10-12 16:10:48,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:10:48,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-12 16:10:48,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2020-10-12 16:10:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-12 16:10:48,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-10-12 16:10:48,377 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 15 [2020-10-12 16:10:48,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:48,378 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-10-12 16:10:48,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:10:48,378 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2020-10-12 16:10:48,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 16:10:48,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:48,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:48,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:10:48,379 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:48,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:48,380 INFO L82 PathProgramCache]: Analyzing trace with hash -810996235, now seen corresponding path program 1 times [2020-10-12 16:10:48,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:48,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519266518] [2020-10-12 16:10:48,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:48,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:48,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:48,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:48,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:48,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:48,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:48,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 16:10:48,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:10:48,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-12 16:10:48,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:48,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:10:48,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:48,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:10:48,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:48,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:48,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:48,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:48,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:48,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:48,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:48,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:48,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:48,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:48,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:48,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:48,681 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 16:10:48,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519266518] [2020-10-12 16:10:48,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:10:48,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 16:10:48,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982123184] [2020-10-12 16:10:48,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:10:48,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:48,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:10:48,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:10:48,684 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 7 states. [2020-10-12 16:10:48,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:48,807 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2020-10-12 16:10:48,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:10:48,808 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-10-12 16:10:48,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:48,810 INFO L225 Difference]: With dead ends: 42 [2020-10-12 16:10:48,810 INFO L226 Difference]: Without dead ends: 29 [2020-10-12 16:10:48,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:10:48,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-12 16:10:48,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2020-10-12 16:10:48,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-12 16:10:48,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2020-10-12 16:10:48,820 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 15 [2020-10-12 16:10:48,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:48,820 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2020-10-12 16:10:48,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:10:48,820 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2020-10-12 16:10:48,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:10:48,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:48,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:48,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:10:48,822 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:48,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:48,822 INFO L82 PathProgramCache]: Analyzing trace with hash 162818764, now seen corresponding path program 1 times [2020-10-12 16:10:48,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:48,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426618025] [2020-10-12 16:10:48,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:48,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:48,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:48,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:48,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:48,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:10:48,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:48,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-12 16:10:48,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:48,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:10:48,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:48,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 16:10:48,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:48,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:48,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:48,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:48,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:48,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:48,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:48,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:48,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:48,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:48,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:48,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:48,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:10:48,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426618025] [2020-10-12 16:10:48,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:10:48,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 16:10:48,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046102945] [2020-10-12 16:10:48,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:10:48,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:48,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:10:48,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:10:48,902 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand 4 states. [2020-10-12 16:10:48,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:48,932 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2020-10-12 16:10:48,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:10:48,932 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-12 16:10:48,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:48,933 INFO L225 Difference]: With dead ends: 31 [2020-10-12 16:10:48,933 INFO L226 Difference]: Without dead ends: 20 [2020-10-12 16:10:48,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:10:48,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-12 16:10:48,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-12 16:10:48,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-12 16:10:48,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2020-10-12 16:10:48,939 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 16 [2020-10-12 16:10:48,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:48,939 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2020-10-12 16:10:48,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:10:48,940 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2020-10-12 16:10:48,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:10:48,940 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:48,941 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:48,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:10:48,941 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:48,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:48,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1761953542, now seen corresponding path program 1 times [2020-10-12 16:10:48,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:48,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818621843] [2020-10-12 16:10:48,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:48,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:48,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:49,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:49,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:10:49,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:49,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-12 16:10:49,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:49,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:10:49,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:49,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 16:10:49,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:10:49,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:49,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:49,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:49,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:49,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:49,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:49,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:49,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:49,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:49,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:49,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:10:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:10:49,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818621843] [2020-10-12 16:10:49,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:49,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:10:49,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270484434] [2020-10-12 16:10:49,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:10:49,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:49,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:10:49,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:10:49,136 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 5 states. [2020-10-12 16:10:49,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:49,204 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-10-12 16:10:49,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:10:49,205 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-12 16:10:49,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:49,206 INFO L225 Difference]: With dead ends: 39 [2020-10-12 16:10:49,206 INFO L226 Difference]: Without dead ends: 30 [2020-10-12 16:10:49,206 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 16:10:49,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-12 16:10:49,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2020-10-12 16:10:49,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-12 16:10:49,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2020-10-12 16:10:49,214 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 16 [2020-10-12 16:10:49,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:49,215 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2020-10-12 16:10:49,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:10:49,215 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2020-10-12 16:10:49,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 16:10:49,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:49,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:49,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:10:49,217 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:49,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:49,217 INFO L82 PathProgramCache]: Analyzing trace with hash -2144225578, now seen corresponding path program 1 times [2020-10-12 16:10:49,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:49,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052118345] [2020-10-12 16:10:49,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:49,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:49,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:49,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:49,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:49,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 16:10:49,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:49,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-12 16:10:49,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:49,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:10:49,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:10:49,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:10:49,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:49,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:49,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:49,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:49,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:49,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:49,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:49,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:49,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:49,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:49,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:49,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:49,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:49,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:10:49,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052118345] [2020-10-12 16:10:49,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:49,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-12 16:10:49,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214326158] [2020-10-12 16:10:49,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:10:49,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:49,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:10:49,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:10:49,334 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 4 states. [2020-10-12 16:10:49,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:49,371 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2020-10-12 16:10:49,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:10:49,372 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-12 16:10:49,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:49,373 INFO L225 Difference]: With dead ends: 41 [2020-10-12 16:10:49,373 INFO L226 Difference]: Without dead ends: 36 [2020-10-12 16:10:49,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:10:49,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-12 16:10:49,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2020-10-12 16:10:49,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 16:10:49,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2020-10-12 16:10:49,381 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2020-10-12 16:10:49,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:49,381 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2020-10-12 16:10:49,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:10:49,382 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2020-10-12 16:10:49,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 16:10:49,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:49,383 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:49,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:10:49,383 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:49,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:49,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1176858987, now seen corresponding path program 2 times [2020-10-12 16:10:49,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:49,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381597730] [2020-10-12 16:10:49,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:49,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:49,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:49,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:49,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:49,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 16:10:49,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:10:49,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-12 16:10:49,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:49,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:10:49,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:49,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:10:49,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:49,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:49,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:49,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:49,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:49,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:49,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:49,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:49,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:49,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:49,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:49,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:49,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381597730] [2020-10-12 16:10:49,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:49,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:10:49,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567088979] [2020-10-12 16:10:49,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:10:49,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:49,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:10:49,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:10:49,648 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand 6 states. [2020-10-12 16:10:49,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:49,727 INFO L93 Difference]: Finished difference Result 69 states and 101 transitions. [2020-10-12 16:10:49,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:10:49,729 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-12 16:10:49,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:49,730 INFO L225 Difference]: With dead ends: 69 [2020-10-12 16:10:49,730 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 16:10:49,730 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 16:10:49,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 16:10:49,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-12 16:10:49,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 16:10:49,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 62 transitions. [2020-10-12 16:10:49,747 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 62 transitions. Word has length 17 [2020-10-12 16:10:49,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:49,747 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 62 transitions. [2020-10-12 16:10:49,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:10:49,748 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 62 transitions. [2020-10-12 16:10:49,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 16:10:49,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:49,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:49,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:10:49,750 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:49,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:49,750 INFO L82 PathProgramCache]: Analyzing trace with hash -2010945700, now seen corresponding path program 1 times [2020-10-12 16:10:49,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:49,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985968883] [2020-10-12 16:10:49,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:49,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:49,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:49,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:49,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:50,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:10:50,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:10:50,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-12 16:10:50,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:50,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:10:50,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:50,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:10:50,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:50,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:50,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:50,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:50,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:50,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:50,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:50,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:50,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:50,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:50,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:50,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985968883] [2020-10-12 16:10:50,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:50,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:10:50,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655584605] [2020-10-12 16:10:50,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:10:50,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:50,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:10:50,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:10:50,499 INFO L87 Difference]: Start difference. First operand 44 states and 62 transitions. Second operand 10 states. [2020-10-12 16:10:50,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:50,739 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2020-10-12 16:10:50,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:10:50,739 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-12 16:10:50,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:50,740 INFO L225 Difference]: With dead ends: 54 [2020-10-12 16:10:50,741 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 16:10:50,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:10:50,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 16:10:50,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-12 16:10:50,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 16:10:50,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 65 transitions. [2020-10-12 16:10:50,750 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 65 transitions. Word has length 18 [2020-10-12 16:10:50,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:50,751 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 65 transitions. [2020-10-12 16:10:50,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:10:50,751 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 65 transitions. [2020-10-12 16:10:50,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 16:10:50,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:50,752 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:50,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:10:50,752 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:50,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:50,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1109756806, now seen corresponding path program 2 times [2020-10-12 16:10:50,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:50,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550747700] [2020-10-12 16:10:50,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:50,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:50,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:51,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:51,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:10:51,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:10:51,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-12 16:10:51,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:51,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:10:51,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 16:10:51,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:10:51,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:10:51,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:51,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:51,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:51,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:51,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:51,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:51,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:51,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:51,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:51,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:51,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:10:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:10:51,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550747700] [2020-10-12 16:10:51,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:51,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:10:51,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852253064] [2020-10-12 16:10:51,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:10:51,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:51,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:10:51,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:10:51,210 INFO L87 Difference]: Start difference. First operand 47 states and 65 transitions. Second operand 6 states. [2020-10-12 16:10:51,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:51,322 INFO L93 Difference]: Finished difference Result 63 states and 84 transitions. [2020-10-12 16:10:51,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:10:51,323 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-12 16:10:51,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:51,324 INFO L225 Difference]: With dead ends: 63 [2020-10-12 16:10:51,324 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 16:10:51,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:10:51,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 16:10:51,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2020-10-12 16:10:51,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 16:10:51,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2020-10-12 16:10:51,339 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 18 [2020-10-12 16:10:51,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:51,339 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2020-10-12 16:10:51,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:10:51,340 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2020-10-12 16:10:51,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 16:10:51,344 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:51,344 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:51,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:10:51,345 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:51,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:51,347 INFO L82 PathProgramCache]: Analyzing trace with hash -684524052, now seen corresponding path program 3 times [2020-10-12 16:10:51,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:51,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475524843] [2020-10-12 16:10:51,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:51,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:51,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:51,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:51,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:10:51,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:51,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-12 16:10:51,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:51,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:10:51,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:51,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:10:51,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:51,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:51,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:51,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:51,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:51,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:51,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:51,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:51,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:51,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:51,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:51,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:10:51,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:10:51,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475524843] [2020-10-12 16:10:51,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:51,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:10:51,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640884452] [2020-10-12 16:10:51,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:10:51,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:51,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:10:51,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:10:51,523 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand 6 states. [2020-10-12 16:10:51,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:51,609 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2020-10-12 16:10:51,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:10:51,610 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-12 16:10:51,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:51,611 INFO L225 Difference]: With dead ends: 58 [2020-10-12 16:10:51,611 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 16:10:51,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:10:51,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 16:10:51,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-10-12 16:10:51,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 16:10:51,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2020-10-12 16:10:51,622 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 18 [2020-10-12 16:10:51,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:51,623 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2020-10-12 16:10:51,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:10:51,623 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2020-10-12 16:10:51,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 16:10:51,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:51,624 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:51,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 16:10:51,625 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:51,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:51,625 INFO L82 PathProgramCache]: Analyzing trace with hash 2120730518, now seen corresponding path program 2 times [2020-10-12 16:10:51,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:51,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87810143] [2020-10-12 16:10:51,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:51,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:51,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:51,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:51,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:51,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 16:10:51,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:10:51,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-12 16:10:51,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:51,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:10:51,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:51,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:10:51,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:52,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:52,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:52,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:52,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:52,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:52,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:52,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:52,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:52,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:52,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:52,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 16:10:52,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87810143] [2020-10-12 16:10:52,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:52,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:10:52,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253650935] [2020-10-12 16:10:52,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:10:52,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:52,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:10:52,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:10:52,078 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 10 states. [2020-10-12 16:10:52,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:52,385 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2020-10-12 16:10:52,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:10:52,386 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-12 16:10:52,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:52,386 INFO L225 Difference]: With dead ends: 51 [2020-10-12 16:10:52,386 INFO L226 Difference]: Without dead ends: 36 [2020-10-12 16:10:52,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:10:52,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-12 16:10:52,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-12 16:10:52,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 16:10:52,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2020-10-12 16:10:52,394 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 19 [2020-10-12 16:10:52,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:52,395 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2020-10-12 16:10:52,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:10:52,395 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2020-10-12 16:10:52,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 16:10:52,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:52,396 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:52,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 16:10:52,396 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:52,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:52,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1049372473, now seen corresponding path program 4 times [2020-10-12 16:10:52,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:52,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887659639] [2020-10-12 16:10:52,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:52,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:52,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:52,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:52,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:52,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 16:10:52,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:10:52,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-12 16:10:52,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:52,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:10:52,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:52,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:10:52,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:52,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:52,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:52,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:52,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:52,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:52,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:52,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:52,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:52,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:52,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:52,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:52,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887659639] [2020-10-12 16:10:52,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:52,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:10:52,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321695060] [2020-10-12 16:10:52,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:10:52,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:52,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:10:52,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:10:52,701 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 7 states. [2020-10-12 16:10:52,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:52,782 INFO L93 Difference]: Finished difference Result 75 states and 104 transitions. [2020-10-12 16:10:52,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:10:52,783 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-10-12 16:10:52,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:52,784 INFO L225 Difference]: With dead ends: 75 [2020-10-12 16:10:52,784 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 16:10:52,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:10:52,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 16:10:52,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 42. [2020-10-12 16:10:52,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 16:10:52,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2020-10-12 16:10:52,794 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 19 [2020-10-12 16:10:52,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:52,794 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2020-10-12 16:10:52,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:10:52,794 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2020-10-12 16:10:52,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 16:10:52,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:52,795 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:52,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 16:10:52,795 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:52,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:52,796 INFO L82 PathProgramCache]: Analyzing trace with hash -61628532, now seen corresponding path program 3 times [2020-10-12 16:10:52,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:52,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429748059] [2020-10-12 16:10:52,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:52,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:52,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:53,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:53,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:10:53,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:53,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-12 16:10:53,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:53,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:10:53,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:53,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:10:53,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:53,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:53,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:53,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:53,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:53,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:53,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:53,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:53,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:53,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:53,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:53,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:53,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 16:10:53,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429748059] [2020-10-12 16:10:53,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:53,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:10:53,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992225437] [2020-10-12 16:10:53,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:10:53,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:53,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:10:53,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:10:53,115 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand 7 states. [2020-10-12 16:10:53,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:53,207 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2020-10-12 16:10:53,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:10:53,207 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-12 16:10:53,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:53,208 INFO L225 Difference]: With dead ends: 61 [2020-10-12 16:10:53,208 INFO L226 Difference]: Without dead ends: 51 [2020-10-12 16:10:53,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:10:53,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-12 16:10:53,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2020-10-12 16:10:53,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 16:10:53,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 54 transitions. [2020-10-12 16:10:53,217 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 54 transitions. Word has length 20 [2020-10-12 16:10:53,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:53,217 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 54 transitions. [2020-10-12 16:10:53,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:10:53,218 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 54 transitions. [2020-10-12 16:10:53,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 16:10:53,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:53,219 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:53,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 16:10:53,219 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:53,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:53,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1324722900, now seen corresponding path program 3 times [2020-10-12 16:10:53,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:53,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472665258] [2020-10-12 16:10:53,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:53,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:53,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:53,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:53,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:10:53,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:53,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 104 [2020-10-12 16:10:53,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:53,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:10:53,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:10:53,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:10:53,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:53,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:53,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:53,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:53,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:53,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:53,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:53,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:53,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:53,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:53,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:53,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:10:53,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472665258] [2020-10-12 16:10:53,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:53,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:10:53,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065666565] [2020-10-12 16:10:53,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:10:53,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:53,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:10:53,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:10:53,376 INFO L87 Difference]: Start difference. First operand 42 states and 54 transitions. Second operand 5 states. [2020-10-12 16:10:53,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:53,490 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2020-10-12 16:10:53,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:10:53,491 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-12 16:10:53,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:53,492 INFO L225 Difference]: With dead ends: 67 [2020-10-12 16:10:53,492 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 16:10:53,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:10:53,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 16:10:53,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2020-10-12 16:10:53,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 16:10:53,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2020-10-12 16:10:53,503 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 20 [2020-10-12 16:10:53,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:53,503 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2020-10-12 16:10:53,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:10:53,503 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2020-10-12 16:10:53,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 16:10:53,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:53,504 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:53,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 16:10:53,505 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:53,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:53,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1027409414, now seen corresponding path program 5 times [2020-10-12 16:10:53,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:53,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53934964] [2020-10-12 16:10:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:53,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:53,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:53,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:53,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:53,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:10:53,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:53,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-12 16:10:53,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:53,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:10:53,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:53,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:10:53,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:53,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:53,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:53,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:53,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:53,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:53,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:53,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:53,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:53,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:53,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:53,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:53,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 16:10:53,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53934964] [2020-10-12 16:10:53,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:53,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:10:53,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702492415] [2020-10-12 16:10:53,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:10:53,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:53,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:10:53,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:10:53,686 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand 7 states. [2020-10-12 16:10:53,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:53,776 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2020-10-12 16:10:53,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:10:53,777 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-10-12 16:10:53,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:53,778 INFO L225 Difference]: With dead ends: 65 [2020-10-12 16:10:53,778 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 16:10:53,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:10:53,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 16:10:53,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-12 16:10:53,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 16:10:53,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2020-10-12 16:10:53,787 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 20 [2020-10-12 16:10:53,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:53,788 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2020-10-12 16:10:53,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:10:53,788 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2020-10-12 16:10:53,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 16:10:53,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:53,789 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:53,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 16:10:53,789 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:53,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:53,789 INFO L82 PathProgramCache]: Analyzing trace with hash 525228364, now seen corresponding path program 6 times [2020-10-12 16:10:53,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:53,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347254415] [2020-10-12 16:10:53,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:53,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:53,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:53,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:54,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:54,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:10:54,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:10:54,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-12 16:10:54,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:54,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:10:54,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:54,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:10:54,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:54,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:54,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:54,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:54,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:54,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:54,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:54,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:54,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:54,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:54,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:54,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:54,190 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:54,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347254415] [2020-10-12 16:10:54,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:54,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:10:54,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682805640] [2020-10-12 16:10:54,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:10:54,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:54,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:10:54,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:10:54,192 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand 8 states. [2020-10-12 16:10:54,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:54,302 INFO L93 Difference]: Finished difference Result 95 states and 134 transitions. [2020-10-12 16:10:54,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:10:54,303 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-12 16:10:54,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:54,304 INFO L225 Difference]: With dead ends: 95 [2020-10-12 16:10:54,304 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 16:10:54,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:10:54,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 16:10:54,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2020-10-12 16:10:54,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 16:10:54,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2020-10-12 16:10:54,315 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 20 [2020-10-12 16:10:54,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:54,315 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2020-10-12 16:10:54,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:10:54,316 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2020-10-12 16:10:54,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:10:54,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:54,316 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:54,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 16:10:54,317 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:54,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:54,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1918800838, now seen corresponding path program 4 times [2020-10-12 16:10:54,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:54,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904491031] [2020-10-12 16:10:54,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:54,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:54,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:54,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:54,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:54,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 16:10:54,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:54,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-12 16:10:54,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:54,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:10:54,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:10:54,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:10:54,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:54,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:54,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:54,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:54,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:54,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:54,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:54,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:54,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:54,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:54,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:54,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:54,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 16:10:54,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904491031] [2020-10-12 16:10:54,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:54,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:10:54,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565241642] [2020-10-12 16:10:54,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:10:54,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:54,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:10:54,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:10:54,504 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand 5 states. [2020-10-12 16:10:54,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:54,598 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2020-10-12 16:10:54,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:10:54,599 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-12 16:10:54,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:54,600 INFO L225 Difference]: With dead ends: 78 [2020-10-12 16:10:54,600 INFO L226 Difference]: Without dead ends: 73 [2020-10-12 16:10:54,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:10:54,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-12 16:10:54,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-10-12 16:10:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-12 16:10:54,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2020-10-12 16:10:54,612 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 21 [2020-10-12 16:10:54,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:54,612 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2020-10-12 16:10:54,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:10:54,612 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2020-10-12 16:10:54,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:10:54,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:54,613 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:54,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 16:10:54,613 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:54,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:54,614 INFO L82 PathProgramCache]: Analyzing trace with hash 655706470, now seen corresponding path program 4 times [2020-10-12 16:10:54,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:54,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863944051] [2020-10-12 16:10:54,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:54,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:54,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:54,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:55,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:55,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 16:10:55,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:10:55,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 706 [2020-10-12 16:10:55,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:55,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:10:55,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:55,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:10:55,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:55,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:55,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:55,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:55,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:55,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:55,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:55,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:55,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:55,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:55,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:55,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-12 16:10:55,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863944051] [2020-10-12 16:10:55,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:55,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:10:55,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110239324] [2020-10-12 16:10:55,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:10:55,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:55,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:10:55,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:10:55,410 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand 8 states. [2020-10-12 16:10:55,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:55,568 INFO L93 Difference]: Finished difference Result 89 states and 113 transitions. [2020-10-12 16:10:55,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:10:55,568 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-12 16:10:55,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:55,570 INFO L225 Difference]: With dead ends: 89 [2020-10-12 16:10:55,570 INFO L226 Difference]: Without dead ends: 79 [2020-10-12 16:10:55,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:10:55,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-12 16:10:55,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2020-10-12 16:10:55,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 16:10:55,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2020-10-12 16:10:55,586 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 21 [2020-10-12 16:10:55,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:55,586 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2020-10-12 16:10:55,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:10:55,586 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2020-10-12 16:10:55,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:10:55,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:55,587 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:55,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 16:10:55,588 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:55,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:55,588 INFO L82 PathProgramCache]: Analyzing trace with hash 2093214055, now seen corresponding path program 7 times [2020-10-12 16:10:55,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:55,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836806854] [2020-10-12 16:10:55,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:55,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:55,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:55,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:56,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:56,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 16:10:56,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:10:56,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 406 [2020-10-12 16:10:56,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:56,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:10:56,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:56,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:10:56,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:56,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:56,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:56,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:56,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:56,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:56,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:56,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:56,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:56,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:56,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:56,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:56,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836806854] [2020-10-12 16:10:56,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:56,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:10:56,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504699301] [2020-10-12 16:10:56,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:10:56,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:56,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:10:56,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:10:56,096 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand 9 states. [2020-10-12 16:10:56,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:56,277 INFO L93 Difference]: Finished difference Result 141 states and 201 transitions. [2020-10-12 16:10:56,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:10:56,278 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-12 16:10:56,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:56,280 INFO L225 Difference]: With dead ends: 141 [2020-10-12 16:10:56,280 INFO L226 Difference]: Without dead ends: 128 [2020-10-12 16:10:56,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:10:56,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-12 16:10:56,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 80. [2020-10-12 16:10:56,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 16:10:56,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 105 transitions. [2020-10-12 16:10:56,296 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 105 transitions. Word has length 21 [2020-10-12 16:10:56,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:56,297 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 105 transitions. [2020-10-12 16:10:56,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:10:56,297 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 105 transitions. [2020-10-12 16:10:56,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:10:56,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:56,298 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:56,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 16:10:56,299 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:56,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:56,299 INFO L82 PathProgramCache]: Analyzing trace with hash -611178388, now seen corresponding path program 5 times [2020-10-12 16:10:56,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:56,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156443582] [2020-10-12 16:10:56,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:56,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:56,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:56,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:56,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:56,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:56,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:10:56,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:10:56,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 581 [2020-10-12 16:10:56,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:56,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:10:56,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:56,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:10:56,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:57,078 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2020-10-12 16:10:57,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:57,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:57,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:57,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:57,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:57,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:57,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:57,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:57,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:57,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:57,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:57,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 16:10:57,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156443582] [2020-10-12 16:10:57,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:57,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:10:57,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575446316] [2020-10-12 16:10:57,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:10:57,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:57,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:10:57,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:10:57,154 INFO L87 Difference]: Start difference. First operand 80 states and 105 transitions. Second operand 9 states. [2020-10-12 16:10:57,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:57,452 INFO L93 Difference]: Finished difference Result 106 states and 133 transitions. [2020-10-12 16:10:57,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:10:57,453 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-12 16:10:57,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:57,454 INFO L225 Difference]: With dead ends: 106 [2020-10-12 16:10:57,454 INFO L226 Difference]: Without dead ends: 91 [2020-10-12 16:10:57,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:10:57,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-12 16:10:57,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 78. [2020-10-12 16:10:57,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 16:10:57,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2020-10-12 16:10:57,469 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 22 [2020-10-12 16:10:57,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:57,469 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2020-10-12 16:10:57,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:10:57,469 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2020-10-12 16:10:57,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:10:57,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:57,470 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:57,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 16:10:57,470 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:57,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:57,471 INFO L82 PathProgramCache]: Analyzing trace with hash 25976860, now seen corresponding path program 6 times [2020-10-12 16:10:57,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:57,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648613763] [2020-10-12 16:10:57,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:57,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:57,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:57,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:57,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:10:57,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:57,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-12 16:10:57,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:57,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:10:57,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:57,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:10:57,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:57,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:57,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:57,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:57,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:57,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:57,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:57,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:57,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:57,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:57,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:57,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:57,818 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 16:10:57,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648613763] [2020-10-12 16:10:57,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:57,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:10:57,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209365405] [2020-10-12 16:10:57,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:10:57,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:57,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:10:57,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:10:57,821 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand 8 states. [2020-10-12 16:10:57,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:57,942 INFO L93 Difference]: Finished difference Result 107 states and 135 transitions. [2020-10-12 16:10:57,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:10:57,943 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-12 16:10:57,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:57,944 INFO L225 Difference]: With dead ends: 107 [2020-10-12 16:10:57,944 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 16:10:57,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:10:57,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 16:10:57,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 78. [2020-10-12 16:10:57,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 16:10:57,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2020-10-12 16:10:57,957 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 22 [2020-10-12 16:10:57,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:57,958 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2020-10-12 16:10:57,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:10:57,958 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2020-10-12 16:10:57,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:10:57,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:57,960 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:57,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 16:10:57,961 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:57,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:57,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1016361580, now seen corresponding path program 8 times [2020-10-12 16:10:57,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:57,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444416736] [2020-10-12 16:10:57,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:57,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:57,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:58,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:10:58,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:58,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-12 16:10:58,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:58,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:10:58,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:58,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:10:58,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:58,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:58,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:58,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:58,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:58,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:58,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:58,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:58,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:58,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:58,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:58,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:58,206 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 16:10:58,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444416736] [2020-10-12 16:10:58,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:58,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:10:58,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385261877] [2020-10-12 16:10:58,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:10:58,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:58,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:10:58,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:10:58,212 INFO L87 Difference]: Start difference. First operand 78 states and 101 transitions. Second operand 8 states. [2020-10-12 16:10:58,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:58,332 INFO L93 Difference]: Finished difference Result 119 states and 148 transitions. [2020-10-12 16:10:58,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:10:58,335 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-12 16:10:58,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:58,336 INFO L225 Difference]: With dead ends: 119 [2020-10-12 16:10:58,336 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 16:10:58,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:10:58,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 16:10:58,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2020-10-12 16:10:58,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 16:10:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2020-10-12 16:10:58,352 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 22 [2020-10-12 16:10:58,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:58,352 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2020-10-12 16:10:58,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:10:58,353 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2020-10-12 16:10:58,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:10:58,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:58,353 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:58,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 16:10:58,354 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:58,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:58,354 INFO L82 PathProgramCache]: Analyzing trace with hash -838837076, now seen corresponding path program 9 times [2020-10-12 16:10:58,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:58,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612471631] [2020-10-12 16:10:58,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:58,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:58,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:58,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:10:58,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:10:58,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 367 [2020-10-12 16:10:58,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:58,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:10:58,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:58,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:10:58,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:58,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:58,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:58,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:58,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:58,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:58,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:58,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:58,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:58,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:58,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:58,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:58,844 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:58,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612471631] [2020-10-12 16:10:58,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:58,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:10:58,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545915951] [2020-10-12 16:10:58,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:10:58,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:58,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:10:58,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:10:58,846 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand 10 states. [2020-10-12 16:10:59,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:59,020 INFO L93 Difference]: Finished difference Result 155 states and 220 transitions. [2020-10-12 16:10:59,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:10:59,020 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-10-12 16:10:59,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:59,021 INFO L225 Difference]: With dead ends: 155 [2020-10-12 16:10:59,021 INFO L226 Difference]: Without dead ends: 142 [2020-10-12 16:10:59,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:10:59,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-12 16:10:59,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 88. [2020-10-12 16:10:59,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-12 16:10:59,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 115 transitions. [2020-10-12 16:10:59,035 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 115 transitions. Word has length 22 [2020-10-12 16:10:59,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:59,036 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 115 transitions. [2020-10-12 16:10:59,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:10:59,036 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 115 transitions. [2020-10-12 16:10:59,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 16:10:59,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:59,037 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:59,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 16:10:59,037 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:59,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:59,037 INFO L82 PathProgramCache]: Analyzing trace with hash -408841578, now seen corresponding path program 5 times [2020-10-12 16:10:59,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:59,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632792143] [2020-10-12 16:10:59,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:59,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:59,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:59,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:59,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:59,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 16:10:59,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:10:59,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-12 16:10:59,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:59,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:10:59,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:10:59,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:10:59,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:59,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:59,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:59,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:59,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:59,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:59,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:59,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:59,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:59,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:59,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:59,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 16:10:59,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632792143] [2020-10-12 16:10:59,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:59,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:10:59,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097793831] [2020-10-12 16:10:59,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:10:59,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:59,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:10:59,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:10:59,245 INFO L87 Difference]: Start difference. First operand 88 states and 115 transitions. Second operand 6 states. [2020-10-12 16:10:59,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:59,572 INFO L93 Difference]: Finished difference Result 114 states and 150 transitions. [2020-10-12 16:10:59,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:10:59,573 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-12 16:10:59,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:59,574 INFO L225 Difference]: With dead ends: 114 [2020-10-12 16:10:59,574 INFO L226 Difference]: Without dead ends: 109 [2020-10-12 16:10:59,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:10:59,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-12 16:10:59,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 93. [2020-10-12 16:10:59,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-12 16:10:59,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2020-10-12 16:10:59,592 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 125 transitions. Word has length 23 [2020-10-12 16:10:59,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:59,592 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 125 transitions. [2020-10-12 16:10:59,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:10:59,592 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 125 transitions. [2020-10-12 16:10:59,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 16:10:59,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:59,593 INFO L422 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:59,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 16:10:59,593 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:59,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:59,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1538108921, now seen corresponding path program 10 times [2020-10-12 16:10:59,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:59,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976644434] [2020-10-12 16:10:59,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:59,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:59,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:59,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:59,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:00,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:00,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 16:11:00,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:00,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 527 [2020-10-12 16:11:00,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:00,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:11:00,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:00,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:11:00,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:00,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:00,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:00,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:00,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:00,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:00,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:00,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:00,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:00,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:00,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:00,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:00,255 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:00,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976644434] [2020-10-12 16:11:00,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:00,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:11:00,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076614039] [2020-10-12 16:11:00,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:11:00,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:00,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:11:00,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:11:00,258 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 11 states. [2020-10-12 16:11:00,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:00,521 INFO L93 Difference]: Finished difference Result 178 states and 260 transitions. [2020-10-12 16:11:00,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:11:00,525 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-10-12 16:11:00,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:00,526 INFO L225 Difference]: With dead ends: 178 [2020-10-12 16:11:00,526 INFO L226 Difference]: Without dead ends: 165 [2020-10-12 16:11:00,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:11:00,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-12 16:11:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 104. [2020-10-12 16:11:00,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-12 16:11:00,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 142 transitions. [2020-10-12 16:11:00,545 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 142 transitions. Word has length 23 [2020-10-12 16:11:00,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:00,545 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 142 transitions. [2020-10-12 16:11:00,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:11:00,545 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 142 transitions. [2020-10-12 16:11:00,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:11:00,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:00,546 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:00,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 16:11:00,547 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:00,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:00,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1859614010, now seen corresponding path program 7 times [2020-10-12 16:11:00,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:00,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654289018] [2020-10-12 16:11:00,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:00,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:00,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:01,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:01,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:11:01,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:11:01,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 529 [2020-10-12 16:11:01,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:01,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:11:01,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:01,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 16:11:01,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:01,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:01,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:01,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:01,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:01,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:01,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:01,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:01,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:01,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:01,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:01,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-12 16:11:01,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654289018] [2020-10-12 16:11:01,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:01,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:11:01,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243392904] [2020-10-12 16:11:01,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:11:01,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:01,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:11:01,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:11:01,212 INFO L87 Difference]: Start difference. First operand 104 states and 142 transitions. Second operand 9 states. [2020-10-12 16:11:01,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:01,380 INFO L93 Difference]: Finished difference Result 133 states and 175 transitions. [2020-10-12 16:11:01,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:11:01,380 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-12 16:11:01,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:01,381 INFO L225 Difference]: With dead ends: 133 [2020-10-12 16:11:01,382 INFO L226 Difference]: Without dead ends: 121 [2020-10-12 16:11:01,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:11:01,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-12 16:11:01,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 104. [2020-10-12 16:11:01,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-12 16:11:01,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 141 transitions. [2020-10-12 16:11:01,400 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 141 transitions. Word has length 24 [2020-10-12 16:11:01,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:01,401 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 141 transitions. [2020-10-12 16:11:01,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:11:01,401 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 141 transitions. [2020-10-12 16:11:01,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:11:01,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:01,402 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:01,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 16:11:01,402 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:01,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:01,402 INFO L82 PathProgramCache]: Analyzing trace with hash 246350748, now seen corresponding path program 8 times [2020-10-12 16:11:01,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:01,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654945513] [2020-10-12 16:11:01,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:01,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:01,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:01,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:01,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:11:01,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:11:01,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-12 16:11:01,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:01,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:11:01,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:11:01,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:11:01,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:01,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:01,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:01,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:01,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:01,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:01,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:01,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:01,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:01,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:01,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:01,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:01,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:01,690 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 16:11:01,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654945513] [2020-10-12 16:11:01,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:01,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:11:01,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950210567] [2020-10-12 16:11:01,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:11:01,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:01,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:11:01,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:11:01,692 INFO L87 Difference]: Start difference. First operand 104 states and 141 transitions. Second operand 6 states. [2020-10-12 16:11:01,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:01,968 INFO L93 Difference]: Finished difference Result 125 states and 165 transitions. [2020-10-12 16:11:01,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:11:01,969 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-12 16:11:01,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:01,970 INFO L225 Difference]: With dead ends: 125 [2020-10-12 16:11:01,971 INFO L226 Difference]: Without dead ends: 120 [2020-10-12 16:11:01,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:11:01,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-12 16:11:01,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 104. [2020-10-12 16:11:01,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-12 16:11:02,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 141 transitions. [2020-10-12 16:11:02,000 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 141 transitions. Word has length 24 [2020-10-12 16:11:02,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:02,001 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 141 transitions. [2020-10-12 16:11:02,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:11:02,001 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 141 transitions. [2020-10-12 16:11:02,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:11:02,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:02,002 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:02,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 16:11:02,003 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:02,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:02,003 INFO L82 PathProgramCache]: Analyzing trace with hash 609951994, now seen corresponding path program 6 times [2020-10-12 16:11:02,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:02,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133384565] [2020-10-12 16:11:02,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:02,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:02,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:02,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:03,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:03,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:11:03,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:03,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1197 [2020-10-12 16:11:03,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:03,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:11:03,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:03,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:11:03,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:03,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:03,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:03,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:03,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:03,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:03,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:03,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:03,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:03,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:03,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:03,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:03,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:03,326 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 16:11:03,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133384565] [2020-10-12 16:11:03,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:03,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:11:03,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424681336] [2020-10-12 16:11:03,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:11:03,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:03,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:11:03,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:11:03,329 INFO L87 Difference]: Start difference. First operand 104 states and 141 transitions. Second operand 10 states. [2020-10-12 16:11:03,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:03,680 INFO L93 Difference]: Finished difference Result 126 states and 166 transitions. [2020-10-12 16:11:03,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:11:03,681 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-12 16:11:03,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:03,683 INFO L225 Difference]: With dead ends: 126 [2020-10-12 16:11:03,683 INFO L226 Difference]: Without dead ends: 115 [2020-10-12 16:11:03,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:11:03,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-12 16:11:03,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 103. [2020-10-12 16:11:03,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 16:11:03,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 138 transitions. [2020-10-12 16:11:03,718 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 138 transitions. Word has length 24 [2020-10-12 16:11:03,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:03,718 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 138 transitions. [2020-10-12 16:11:03,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:11:03,719 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 138 transitions. [2020-10-12 16:11:03,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:11:03,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:03,720 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:03,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 16:11:03,720 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:03,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:03,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1176237132, now seen corresponding path program 9 times [2020-10-12 16:11:03,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:03,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950749214] [2020-10-12 16:11:03,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:03,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:03,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:04,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:04,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:11:04,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:11:04,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-10-12 16:11:04,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:04,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:11:04,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:04,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 16:11:04,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:04,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:04,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:04,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:04,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:04,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:04,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:04,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:04,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:04,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:04,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:04,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:04,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-12 16:11:04,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950749214] [2020-10-12 16:11:04,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:04,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:11:04,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218994128] [2020-10-12 16:11:04,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:11:04,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:04,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:11:04,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:11:04,106 INFO L87 Difference]: Start difference. First operand 103 states and 138 transitions. Second operand 9 states. [2020-10-12 16:11:04,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:04,296 INFO L93 Difference]: Finished difference Result 137 states and 177 transitions. [2020-10-12 16:11:04,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:11:04,297 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-12 16:11:04,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:04,298 INFO L225 Difference]: With dead ends: 137 [2020-10-12 16:11:04,298 INFO L226 Difference]: Without dead ends: 125 [2020-10-12 16:11:04,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:11:04,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-12 16:11:04,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 103. [2020-10-12 16:11:04,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 16:11:04,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 137 transitions. [2020-10-12 16:11:04,317 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 137 transitions. Word has length 24 [2020-10-12 16:11:04,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:04,317 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 137 transitions. [2020-10-12 16:11:04,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:11:04,317 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 137 transitions. [2020-10-12 16:11:04,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:11:04,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:04,318 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:04,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 16:11:04,318 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:04,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:04,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1616753926, now seen corresponding path program 11 times [2020-10-12 16:11:04,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:04,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855018019] [2020-10-12 16:11:04,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:04,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:04,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:04,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:04,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:11:04,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:11:04,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-12 16:11:04,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:04,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:11:04,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:04,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 16:11:04,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:04,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:04,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:04,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:04,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:04,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:04,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:04,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:04,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:04,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:04,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:04,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:04,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-12 16:11:04,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855018019] [2020-10-12 16:11:04,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:04,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:11:04,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920342827] [2020-10-12 16:11:04,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:11:04,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:04,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:11:04,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:11:04,547 INFO L87 Difference]: Start difference. First operand 103 states and 137 transitions. Second operand 9 states. [2020-10-12 16:11:04,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:04,747 INFO L93 Difference]: Finished difference Result 150 states and 191 transitions. [2020-10-12 16:11:04,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:11:04,748 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-12 16:11:04,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:04,749 INFO L225 Difference]: With dead ends: 150 [2020-10-12 16:11:04,749 INFO L226 Difference]: Without dead ends: 136 [2020-10-12 16:11:04,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:11:04,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-12 16:11:04,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 103. [2020-10-12 16:11:04,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 16:11:04,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 136 transitions. [2020-10-12 16:11:04,774 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 136 transitions. Word has length 24 [2020-10-12 16:11:04,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:04,774 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 136 transitions. [2020-10-12 16:11:04,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:11:04,774 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 136 transitions. [2020-10-12 16:11:04,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:11:04,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:04,775 INFO L422 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:04,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 16:11:04,776 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:04,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:04,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1740699636, now seen corresponding path program 12 times [2020-10-12 16:11:04,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:04,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185860004] [2020-10-12 16:11:04,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:04,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:04,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:04,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:05,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:05,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:11:05,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:05,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 589 [2020-10-12 16:11:05,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:05,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:11:05,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:05,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:11:05,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:05,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:05,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:05,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:05,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:05,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:05,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:05,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:05,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:05,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:05,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:05,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:05,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:05,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185860004] [2020-10-12 16:11:05,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:05,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:11:05,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122017952] [2020-10-12 16:11:05,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:11:05,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:05,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:11:05,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:11:05,518 INFO L87 Difference]: Start difference. First operand 103 states and 136 transitions. Second operand 12 states. [2020-10-12 16:11:05,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:05,826 INFO L93 Difference]: Finished difference Result 198 states and 287 transitions. [2020-10-12 16:11:05,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:11:05,826 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-10-12 16:11:05,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:05,828 INFO L225 Difference]: With dead ends: 198 [2020-10-12 16:11:05,828 INFO L226 Difference]: Without dead ends: 185 [2020-10-12 16:11:05,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:11:05,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-12 16:11:05,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 114. [2020-10-12 16:11:05,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-12 16:11:05,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 153 transitions. [2020-10-12 16:11:05,852 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 153 transitions. Word has length 24 [2020-10-12 16:11:05,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:05,853 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 153 transitions. [2020-10-12 16:11:05,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:11:05,853 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 153 transitions. [2020-10-12 16:11:05,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:11:05,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:05,854 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:05,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 16:11:05,854 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:05,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:05,855 INFO L82 PathProgramCache]: Analyzing trace with hash -917523626, now seen corresponding path program 10 times [2020-10-12 16:11:05,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:05,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822487474] [2020-10-12 16:11:05,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:05,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:05,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:06,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:06,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:11:06,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:11:06,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-12 16:11:06,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:06,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:11:06,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 16:11:06,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:11:06,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:06,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:06,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:06,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:06,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:06,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:06,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:06,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:06,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:06,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:06,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:06,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-12 16:11:06,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822487474] [2020-10-12 16:11:06,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:06,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:11:06,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397610903] [2020-10-12 16:11:06,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:11:06,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:06,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:11:06,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:11:06,090 INFO L87 Difference]: Start difference. First operand 114 states and 153 transitions. Second operand 6 states. [2020-10-12 16:11:06,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:06,350 INFO L93 Difference]: Finished difference Result 138 states and 180 transitions. [2020-10-12 16:11:06,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:11:06,351 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-12 16:11:06,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:06,352 INFO L225 Difference]: With dead ends: 138 [2020-10-12 16:11:06,353 INFO L226 Difference]: Without dead ends: 133 [2020-10-12 16:11:06,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:11:06,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-12 16:11:06,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2020-10-12 16:11:06,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-12 16:11:06,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 170 transitions. [2020-10-12 16:11:06,385 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 170 transitions. Word has length 25 [2020-10-12 16:11:06,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:06,385 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 170 transitions. [2020-10-12 16:11:06,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:11:06,385 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 170 transitions. [2020-10-12 16:11:06,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:11:06,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:06,389 INFO L422 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:06,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 16:11:06,390 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:06,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:06,390 INFO L82 PathProgramCache]: Analyzing trace with hash 568922791, now seen corresponding path program 13 times [2020-10-12 16:11:06,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:06,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29240445] [2020-10-12 16:11:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:06,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:06,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:06,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:07,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:11:07,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:07,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 605 [2020-10-12 16:11:07,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:07,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:11:07,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:07,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:11:07,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:07,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:07,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:07,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:07,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:07,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:07,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:07,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:07,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:07,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:07,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:07,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:07,224 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:07,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29240445] [2020-10-12 16:11:07,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:07,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:11:07,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471197961] [2020-10-12 16:11:07,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:11:07,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:07,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:11:07,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:11:07,226 INFO L87 Difference]: Start difference. First operand 129 states and 170 transitions. Second operand 13 states. [2020-10-12 16:11:07,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:07,634 INFO L93 Difference]: Finished difference Result 245 states and 357 transitions. [2020-10-12 16:11:07,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:11:07,635 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-10-12 16:11:07,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:07,636 INFO L225 Difference]: With dead ends: 245 [2020-10-12 16:11:07,636 INFO L226 Difference]: Without dead ends: 228 [2020-10-12 16:11:07,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:11:07,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-12 16:11:07,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-10-12 16:11:07,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-12 16:11:07,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 188 transitions. [2020-10-12 16:11:07,667 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 188 transitions. Word has length 25 [2020-10-12 16:11:07,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:07,667 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 188 transitions. [2020-10-12 16:11:07,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:11:07,667 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 188 transitions. [2020-10-12 16:11:07,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:11:07,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:07,668 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:07,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 16:11:07,668 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:07,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:07,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1657076444, now seen corresponding path program 11 times [2020-10-12 16:11:07,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:07,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420295531] [2020-10-12 16:11:07,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:07,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:07,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:08,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:08,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:08,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:11:08,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:11:08,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 943 [2020-10-12 16:11:08,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:08,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:11:08,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:08,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:11:08,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:18,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:18,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:18,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:18,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:18,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:18,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:18,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:18,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:18,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:18,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:18,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:18,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420295531] [2020-10-12 16:11:18,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:18,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:11:18,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474092075] [2020-10-12 16:11:18,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:11:18,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:18,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:11:18,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=263, Unknown=4, NotChecked=0, Total=306 [2020-10-12 16:11:18,686 INFO L87 Difference]: Start difference. First operand 141 states and 188 transitions. Second operand 18 states. [2020-10-12 16:11:23,253 WARN L193 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 43 DAG size of output: 29 [2020-10-12 16:11:39,573 WARN L193 SmtUtils]: Spent 13.42 s on a formula simplification. DAG size of input: 83 DAG size of output: 44 [2020-10-12 16:11:51,237 WARN L193 SmtUtils]: Spent 4.40 s on a formula simplification. DAG size of input: 73 DAG size of output: 39 [2020-10-12 16:11:53,472 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* 4294967296 (div c_main_~n~0 4294967296))) (.cse2 (* c_main_~n~0 (- 1))) (.cse8 (* c_main_~x~0 (- 1)))) (let ((.cse1 (div (+ .cse8 4294967294) 4294967296)) (.cse3 (* 4294967296 (div (+ c_main_~y~0 .cse2 4294967295) 4294967296))) (.cse5 (div (+ .cse8 4294967295) 4294967296)) (.cse7 (+ c_main_~n~0 (* 4294967296 (div c_main_~y~0 4294967296)))) (.cse6 (+ .cse0 c_main_~y~0)) (.cse4 (div (+ .cse8 4294967296) 4294967296))) (and (<= c_main_~y~0 (+ .cse0 (* 4294967296 (div (+ c_main_~x~0 (* .cse1 4294967296) .cse2 3) 4294967296)) 3)) (<= (+ .cse3 c_main_~n~0 2) (+ c_main_~x~0 c_main_~y~0 (* 4294967296 .cse4))) (<= (+ .cse3 c_main_~n~0) (+ c_main_~x~0 c_main_~y~0 (* 4294967296 .cse1))) (<= (+ .cse3 c_main_~n~0 1) (+ c_main_~x~0 c_main_~y~0 (* 4294967296 .cse5))) (<= .cse6 .cse7) (<= c_main_~y~0 (+ .cse0 (* 4294967296 (div (+ c_main_~x~0 .cse2 (* .cse5 4294967296) 2) 4294967296)) 3)) (<= .cse7 .cse6) (<= 3 c_main_~y~0) (<= c_main_~y~0 (+ .cse0 (* 4294967296 (div (+ c_main_~x~0 (* .cse4 4294967296) .cse2 1) 4294967296)) 3))))) is different from false [2020-10-12 16:12:16,775 WARN L193 SmtUtils]: Spent 12.94 s on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-10-12 16:12:29,593 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 49 DAG size of output: 26 [2020-10-12 16:12:29,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:29,679 INFO L93 Difference]: Finished difference Result 154 states and 201 transitions. [2020-10-12 16:12:29,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:12:29,680 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-12 16:12:29,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:29,681 INFO L225 Difference]: With dead ends: 154 [2020-10-12 16:12:29,681 INFO L226 Difference]: Without dead ends: 149 [2020-10-12 16:12:29,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 64.7s TimeCoverageRelationStatistics Valid=81, Invalid=465, Unknown=10, NotChecked=44, Total=600 [2020-10-12 16:12:29,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-12 16:12:29,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2020-10-12 16:12:29,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-12 16:12:29,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 193 transitions. [2020-10-12 16:12:29,724 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 193 transitions. Word has length 26 [2020-10-12 16:12:29,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:29,724 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 193 transitions. [2020-10-12 16:12:29,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:12:29,724 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 193 transitions. [2020-10-12 16:12:29,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:12:29,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:29,726 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:29,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 16:12:29,727 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:29,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:29,727 INFO L82 PathProgramCache]: Analyzing trace with hash -68791060, now seen corresponding path program 12 times [2020-10-12 16:12:29,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:29,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803151525] [2020-10-12 16:12:29,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:29,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:29,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:29,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:30,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:30,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:12:30,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:12:30,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 535 [2020-10-12 16:12:30,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:30,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:12:30,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:30,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:12:30,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:30,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:30,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:30,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:30,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:30,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:30,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:12:30,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:30,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:30,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:30,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:30,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:30,407 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-12 16:12:30,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803151525] [2020-10-12 16:12:30,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:30,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:12:30,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461935448] [2020-10-12 16:12:30,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:12:30,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:30,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:12:30,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:12:30,412 INFO L87 Difference]: Start difference. First operand 146 states and 193 transitions. Second operand 10 states. [2020-10-12 16:12:30,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:30,719 INFO L93 Difference]: Finished difference Result 185 states and 237 transitions. [2020-10-12 16:12:30,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:12:30,721 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-12 16:12:30,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:30,722 INFO L225 Difference]: With dead ends: 185 [2020-10-12 16:12:30,722 INFO L226 Difference]: Without dead ends: 172 [2020-10-12 16:12:30,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:12:30,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-12 16:12:30,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 146. [2020-10-12 16:12:30,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-12 16:12:30,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 192 transitions. [2020-10-12 16:12:30,745 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 192 transitions. Word has length 26 [2020-10-12 16:12:30,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:30,745 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 192 transitions. [2020-10-12 16:12:30,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:12:30,746 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 192 transitions. [2020-10-12 16:12:30,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:12:30,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:30,746 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:30,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 16:12:30,747 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:30,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:30,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1750860012, now seen corresponding path program 7 times [2020-10-12 16:12:30,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:30,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25743041] [2020-10-12 16:12:30,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:30,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:30,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:30,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:31,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:31,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:12:31,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:12:31,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 268 [2020-10-12 16:12:31,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:31,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:12:31,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:12:31,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:12:31,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:31,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:31,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:31,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:31,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:31,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:31,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:31,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:31,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:31,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:31,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:31,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 16:12:31,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25743041] [2020-10-12 16:12:31,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:31,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:12:31,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566730422] [2020-10-12 16:12:31,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:12:31,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:31,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:12:31,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:12:31,112 INFO L87 Difference]: Start difference. First operand 146 states and 192 transitions. Second operand 7 states. [2020-10-12 16:12:31,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:31,534 INFO L93 Difference]: Finished difference Result 181 states and 239 transitions. [2020-10-12 16:12:31,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:12:31,535 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-12 16:12:31,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:31,537 INFO L225 Difference]: With dead ends: 181 [2020-10-12 16:12:31,537 INFO L226 Difference]: Without dead ends: 176 [2020-10-12 16:12:31,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:12:31,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-12 16:12:31,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 166. [2020-10-12 16:12:31,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-12 16:12:31,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 220 transitions. [2020-10-12 16:12:31,557 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 220 transitions. Word has length 26 [2020-10-12 16:12:31,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:31,558 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 220 transitions. [2020-10-12 16:12:31,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:12:31,558 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 220 transitions. [2020-10-12 16:12:31,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:12:31,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:31,559 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:31,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 16:12:31,559 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:31,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:31,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1261009116, now seen corresponding path program 13 times [2020-10-12 16:12:31,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:31,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035158535] [2020-10-12 16:12:31,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:31,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:31,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:31,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:31,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:12:31,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:12:31,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 336 [2020-10-12 16:12:31,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:31,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:12:31,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:31,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:12:31,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:12:32,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:32,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:32,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:32,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:32,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:32,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:32,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:32,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:32,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:32,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:32,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:32,063 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-12 16:12:32,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035158535] [2020-10-12 16:12:32,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:32,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:12:32,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768848710] [2020-10-12 16:12:32,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:12:32,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:32,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:12:32,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:12:32,065 INFO L87 Difference]: Start difference. First operand 166 states and 220 transitions. Second operand 10 states. [2020-10-12 16:12:32,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:32,346 INFO L93 Difference]: Finished difference Result 226 states and 287 transitions. [2020-10-12 16:12:32,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:12:32,348 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-12 16:12:32,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:32,349 INFO L225 Difference]: With dead ends: 226 [2020-10-12 16:12:32,349 INFO L226 Difference]: Without dead ends: 211 [2020-10-12 16:12:32,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:12:32,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-12 16:12:32,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 166. [2020-10-12 16:12:32,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-12 16:12:32,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 219 transitions. [2020-10-12 16:12:32,380 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 219 transitions. Word has length 26 [2020-10-12 16:12:32,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:32,380 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 219 transitions. [2020-10-12 16:12:32,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:12:32,380 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 219 transitions. [2020-10-12 16:12:32,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:12:32,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:32,381 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:32,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 16:12:32,381 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:32,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:32,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1442453228, now seen corresponding path program 14 times [2020-10-12 16:12:32,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:32,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84681750] [2020-10-12 16:12:32,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:32,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:32,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:32,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:32,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:12:32,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:12:32,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-12 16:12:32,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:32,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:12:32,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:32,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:12:32,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:32,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:32,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:32,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:32,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:32,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:32,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:32,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:32,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:32,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:32,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:32,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:32,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:32,670 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 16:12:32,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84681750] [2020-10-12 16:12:32,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:32,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:12:32,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40789977] [2020-10-12 16:12:32,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:12:32,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:32,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:12:32,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:12:32,672 INFO L87 Difference]: Start difference. First operand 166 states and 219 transitions. Second operand 10 states. [2020-10-12 16:12:32,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:32,932 INFO L93 Difference]: Finished difference Result 242 states and 304 transitions. [2020-10-12 16:12:32,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:12:32,936 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-12 16:12:32,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:32,937 INFO L225 Difference]: With dead ends: 242 [2020-10-12 16:12:32,937 INFO L226 Difference]: Without dead ends: 226 [2020-10-12 16:12:32,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:12:32,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-12 16:12:32,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 166. [2020-10-12 16:12:32,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-12 16:12:32,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 218 transitions. [2020-10-12 16:12:32,957 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 218 transitions. Word has length 26 [2020-10-12 16:12:32,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:32,957 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 218 transitions. [2020-10-12 16:12:32,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:12:32,957 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 218 transitions. [2020-10-12 16:12:32,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:12:32,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:32,958 INFO L422 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:32,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 16:12:32,959 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:32,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:32,959 INFO L82 PathProgramCache]: Analyzing trace with hash -847226004, now seen corresponding path program 15 times [2020-10-12 16:12:32,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:32,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027463498] [2020-10-12 16:12:32,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:32,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:32,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:33,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:12:33,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:12:33,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 677 [2020-10-12 16:12:33,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:33,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:12:33,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:33,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:12:33,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:33,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:33,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:33,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:33,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:33,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:33,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:33,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:33,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:33,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:33,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:33,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:33,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027463498] [2020-10-12 16:12:33,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:33,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:12:33,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173670597] [2020-10-12 16:12:33,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:12:33,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:33,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:12:33,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:12:33,865 INFO L87 Difference]: Start difference. First operand 166 states and 218 transitions. Second operand 14 states. [2020-10-12 16:12:34,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:34,399 INFO L93 Difference]: Finished difference Result 308 states and 449 transitions. [2020-10-12 16:12:34,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:12:34,399 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-10-12 16:12:34,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:34,402 INFO L225 Difference]: With dead ends: 308 [2020-10-12 16:12:34,403 INFO L226 Difference]: Without dead ends: 290 [2020-10-12 16:12:34,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:12:34,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-12 16:12:34,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 180. [2020-10-12 16:12:34,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-12 16:12:34,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 239 transitions. [2020-10-12 16:12:34,432 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 239 transitions. Word has length 26 [2020-10-12 16:12:34,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:34,432 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 239 transitions. [2020-10-12 16:12:34,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:12:34,432 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 239 transitions. [2020-10-12 16:12:34,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:12:34,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:34,433 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:34,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 16:12:34,434 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:34,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:34,434 INFO L82 PathProgramCache]: Analyzing trace with hash -134700010, now seen corresponding path program 14 times [2020-10-12 16:12:34,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:34,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747706863] [2020-10-12 16:12:34,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:34,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:34,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:34,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:34,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:34,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:12:34,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:12:34,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 512 [2020-10-12 16:12:34,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:34,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:12:34,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:34,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:12:34,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:35,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:35,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:35,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:35,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:35,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:35,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:12:35,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:35,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:35,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:35,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:35,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 16:12:35,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747706863] [2020-10-12 16:12:35,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:35,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:12:35,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872454309] [2020-10-12 16:12:35,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:12:35,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:35,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:12:35,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:12:35,255 INFO L87 Difference]: Start difference. First operand 180 states and 239 transitions. Second operand 12 states. [2020-10-12 16:12:35,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:35,922 INFO L93 Difference]: Finished difference Result 258 states and 320 transitions. [2020-10-12 16:12:35,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:12:35,923 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-12 16:12:35,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:35,925 INFO L225 Difference]: With dead ends: 258 [2020-10-12 16:12:35,926 INFO L226 Difference]: Without dead ends: 239 [2020-10-12 16:12:35,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:12:35,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-12 16:12:35,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 172. [2020-10-12 16:12:35,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-12 16:12:35,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 231 transitions. [2020-10-12 16:12:35,951 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 231 transitions. Word has length 27 [2020-10-12 16:12:35,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:35,951 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 231 transitions. [2020-10-12 16:12:35,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:12:35,951 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 231 transitions. [2020-10-12 16:12:35,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:12:35,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:35,952 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:35,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 16:12:35,952 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:35,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:35,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1522376698, now seen corresponding path program 15 times [2020-10-12 16:12:35,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:35,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616202575] [2020-10-12 16:12:35,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:35,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:35,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:36,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:36,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:12:36,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:12:36,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 272 [2020-10-12 16:12:36,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:36,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:12:36,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:12:36,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:12:36,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:36,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:36,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:36,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:36,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:36,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:36,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:36,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:36,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:36,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:36,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:36,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:36,319 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-12 16:12:36,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616202575] [2020-10-12 16:12:36,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:36,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:12:36,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325873759] [2020-10-12 16:12:36,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:12:36,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:36,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:12:36,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:12:36,320 INFO L87 Difference]: Start difference. First operand 172 states and 231 transitions. Second operand 7 states. [2020-10-12 16:12:36,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:36,753 INFO L93 Difference]: Finished difference Result 186 states and 248 transitions. [2020-10-12 16:12:36,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:12:36,755 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-12 16:12:36,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:36,756 INFO L225 Difference]: With dead ends: 186 [2020-10-12 16:12:36,756 INFO L226 Difference]: Without dead ends: 181 [2020-10-12 16:12:36,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:12:36,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-12 16:12:36,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 158. [2020-10-12 16:12:36,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-12 16:12:36,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 216 transitions. [2020-10-12 16:12:36,783 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 216 transitions. Word has length 27 [2020-10-12 16:12:36,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:36,783 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 216 transitions. [2020-10-12 16:12:36,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:12:36,783 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 216 transitions. [2020-10-12 16:12:36,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:12:36,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:36,784 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:36,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 16:12:36,785 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:36,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:36,785 INFO L82 PathProgramCache]: Analyzing trace with hash 2024148326, now seen corresponding path program 8 times [2020-10-12 16:12:36,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:36,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716596977] [2020-10-12 16:12:36,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:36,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:36,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:36,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:36,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:37,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:37,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:12:37,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:12:37,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1126 [2020-10-12 16:12:37,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:37,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:12:37,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:37,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:12:37,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:38,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:38,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:38,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:38,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:38,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:38,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:38,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:38,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:38,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:38,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:38,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 16:12:38,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716596977] [2020-10-12 16:12:38,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:38,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:12:38,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232294615] [2020-10-12 16:12:38,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:12:38,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:38,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:12:38,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:12:38,082 INFO L87 Difference]: Start difference. First operand 158 states and 216 transitions. Second operand 12 states. [2020-10-12 16:12:38,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:38,530 INFO L93 Difference]: Finished difference Result 192 states and 254 transitions. [2020-10-12 16:12:38,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:12:38,531 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-12 16:12:38,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:38,532 INFO L225 Difference]: With dead ends: 192 [2020-10-12 16:12:38,532 INFO L226 Difference]: Without dead ends: 172 [2020-10-12 16:12:38,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:12:38,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-12 16:12:38,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 157. [2020-10-12 16:12:38,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-12 16:12:38,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 212 transitions. [2020-10-12 16:12:38,558 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 212 transitions. Word has length 27 [2020-10-12 16:12:38,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:38,558 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 212 transitions. [2020-10-12 16:12:38,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:12:38,559 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 212 transitions. [2020-10-12 16:12:38,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:12:38,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:38,559 INFO L422 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:38,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 16:12:38,560 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:38,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:38,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1798165689, now seen corresponding path program 16 times [2020-10-12 16:12:38,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:38,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047528124] [2020-10-12 16:12:38,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:38,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:38,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:38,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:39,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:39,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:12:39,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:12:39,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 573 [2020-10-12 16:12:39,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:39,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:12:39,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:39,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:12:39,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:39,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:39,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:39,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:39,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:39,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:39,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:12:39,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:39,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:39,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:39,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:39,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:39,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047528124] [2020-10-12 16:12:39,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:39,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:12:39,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375529951] [2020-10-12 16:12:39,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:12:39,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:39,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:12:39,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:12:39,379 INFO L87 Difference]: Start difference. First operand 157 states and 212 transitions. Second operand 15 states. [2020-10-12 16:12:39,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:39,963 INFO L93 Difference]: Finished difference Result 293 states and 433 transitions. [2020-10-12 16:12:39,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:12:39,964 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-10-12 16:12:39,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:39,965 INFO L225 Difference]: With dead ends: 293 [2020-10-12 16:12:39,965 INFO L226 Difference]: Without dead ends: 276 [2020-10-12 16:12:39,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:12:39,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-12 16:12:39,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 170. [2020-10-12 16:12:39,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-12 16:12:39,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 232 transitions. [2020-10-12 16:12:39,993 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 232 transitions. Word has length 27 [2020-10-12 16:12:39,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:39,993 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 232 transitions. [2020-10-12 16:12:39,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:12:39,994 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 232 transitions. [2020-10-12 16:12:39,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:12:39,994 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:39,995 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:39,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 16:12:39,995 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:39,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:39,995 INFO L82 PathProgramCache]: Analyzing trace with hash 86500396, now seen corresponding path program 16 times [2020-10-12 16:12:39,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:39,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154440201] [2020-10-12 16:12:39,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:40,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:40,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:40,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:40,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:40,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:12:40,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:12:40,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-12 16:12:40,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:40,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:12:40,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 16:12:40,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:12:40,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:40,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:40,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:40,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:40,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:40,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:40,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:40,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:40,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:40,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:40,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:40,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:40,230 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-12 16:12:40,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154440201] [2020-10-12 16:12:40,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:40,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:12:40,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158506388] [2020-10-12 16:12:40,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:12:40,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:40,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:12:40,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:12:40,231 INFO L87 Difference]: Start difference. First operand 170 states and 232 transitions. Second operand 7 states. [2020-10-12 16:12:40,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:40,941 INFO L93 Difference]: Finished difference Result 198 states and 263 transitions. [2020-10-12 16:12:40,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:12:40,942 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-12 16:12:40,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:40,943 INFO L225 Difference]: With dead ends: 198 [2020-10-12 16:12:40,944 INFO L226 Difference]: Without dead ends: 193 [2020-10-12 16:12:40,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:12:40,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-12 16:12:40,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 171. [2020-10-12 16:12:40,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-12 16:12:40,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 233 transitions. [2020-10-12 16:12:40,974 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 233 transitions. Word has length 28 [2020-10-12 16:12:40,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:40,974 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 233 transitions. [2020-10-12 16:12:40,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:12:40,974 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 233 transitions. [2020-10-12 16:12:40,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:12:40,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:40,975 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:40,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 16:12:40,975 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:40,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:40,976 INFO L82 PathProgramCache]: Analyzing trace with hash -2012983750, now seen corresponding path program 17 times [2020-10-12 16:12:40,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:40,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589534987] [2020-10-12 16:12:40,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:40,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:41,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:41,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:41,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:12:41,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:12:41,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 298 [2020-10-12 16:12:41,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:41,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:12:41,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:41,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:12:41,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:41,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:41,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:41,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:41,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:41,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:41,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:12:41,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:41,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:41,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:41,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:41,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-12 16:12:41,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589534987] [2020-10-12 16:12:41,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:41,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:12:41,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295748721] [2020-10-12 16:12:41,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:12:41,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:41,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:12:41,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:12:41,436 INFO L87 Difference]: Start difference. First operand 171 states and 233 transitions. Second operand 11 states. [2020-10-12 16:12:41,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:41,767 INFO L93 Difference]: Finished difference Result 212 states and 280 transitions. [2020-10-12 16:12:41,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:12:41,768 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-12 16:12:41,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:41,769 INFO L225 Difference]: With dead ends: 212 [2020-10-12 16:12:41,769 INFO L226 Difference]: Without dead ends: 198 [2020-10-12 16:12:41,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:12:41,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-12 16:12:41,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 171. [2020-10-12 16:12:41,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-12 16:12:41,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 232 transitions. [2020-10-12 16:12:41,799 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 232 transitions. Word has length 28 [2020-10-12 16:12:41,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:41,800 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 232 transitions. [2020-10-12 16:12:41,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:12:41,800 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 232 transitions. [2020-10-12 16:12:41,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:12:41,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:41,801 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:41,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 16:12:41,801 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:41,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:41,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1595762956, now seen corresponding path program 18 times [2020-10-12 16:12:41,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:41,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128312831] [2020-10-12 16:12:41,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:41,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:41,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:42,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:42,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:12:42,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:12:42,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-12 16:12:42,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:42,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:12:42,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:42,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:12:42,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:42,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:42,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:42,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:42,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:42,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:42,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:42,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:42,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:42,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:42,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:42,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:42,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:42,206 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-12 16:12:42,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128312831] [2020-10-12 16:12:42,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:42,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:12:42,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199674410] [2020-10-12 16:12:42,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:12:42,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:42,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:12:42,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:12:42,207 INFO L87 Difference]: Start difference. First operand 171 states and 232 transitions. Second operand 11 states. [2020-10-12 16:12:42,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:42,538 INFO L93 Difference]: Finished difference Result 227 states and 296 transitions. [2020-10-12 16:12:42,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:12:42,542 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-12 16:12:42,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:42,543 INFO L225 Difference]: With dead ends: 227 [2020-10-12 16:12:42,543 INFO L226 Difference]: Without dead ends: 211 [2020-10-12 16:12:42,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:12:42,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-12 16:12:42,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 171. [2020-10-12 16:12:42,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-12 16:12:42,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 231 transitions. [2020-10-12 16:12:42,567 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 231 transitions. Word has length 28 [2020-10-12 16:12:42,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:42,568 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 231 transitions. [2020-10-12 16:12:42,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:12:42,568 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 231 transitions. [2020-10-12 16:12:42,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:12:42,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:42,569 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:42,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 16:12:42,569 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:42,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:42,569 INFO L82 PathProgramCache]: Analyzing trace with hash -504583174, now seen corresponding path program 17 times [2020-10-12 16:12:42,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:42,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973569945] [2020-10-12 16:12:42,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:42,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:42,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:42,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:42,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:42,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:12:42,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:12:42,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-12 16:12:42,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:42,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:12:42,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:42,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:12:42,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:42,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:42,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:42,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:42,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:42,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:42,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:42,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:42,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:42,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:42,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:42,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-12 16:12:42,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973569945] [2020-10-12 16:12:42,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:42,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:12:42,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581383884] [2020-10-12 16:12:42,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:12:42,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:42,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:12:42,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:12:42,901 INFO L87 Difference]: Start difference. First operand 171 states and 231 transitions. Second operand 11 states. [2020-10-12 16:12:43,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:43,207 INFO L93 Difference]: Finished difference Result 243 states and 313 transitions. [2020-10-12 16:12:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:12:43,208 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-12 16:12:43,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:43,209 INFO L225 Difference]: With dead ends: 243 [2020-10-12 16:12:43,209 INFO L226 Difference]: Without dead ends: 226 [2020-10-12 16:12:43,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:12:43,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-12 16:12:43,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 171. [2020-10-12 16:12:43,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-12 16:12:43,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 230 transitions. [2020-10-12 16:12:43,232 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 230 transitions. Word has length 28 [2020-10-12 16:12:43,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:43,233 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 230 transitions. [2020-10-12 16:12:43,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:12:43,233 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 230 transitions. [2020-10-12 16:12:43,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:12:43,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:43,234 INFO L422 BasicCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:43,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 16:12:43,234 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:43,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:43,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1212524852, now seen corresponding path program 18 times [2020-10-12 16:12:43,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:43,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041431765] [2020-10-12 16:12:43,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:43,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:43,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:43,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:44,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:44,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:12:44,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:12:44,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 910 [2020-10-12 16:12:44,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:44,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:12:44,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:44,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:12:44,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:44,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:44,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:44,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:44,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:44,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:44,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:12:44,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:44,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:44,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:44,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:44,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:12:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:44,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041431765] [2020-10-12 16:12:44,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:44,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:12:44,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388751326] [2020-10-12 16:12:44,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:12:44,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:44,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:12:44,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:12:44,510 INFO L87 Difference]: Start difference. First operand 171 states and 230 transitions. Second operand 16 states. [2020-10-12 16:12:45,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:45,296 INFO L93 Difference]: Finished difference Result 315 states and 466 transitions. [2020-10-12 16:12:45,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:12:45,297 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2020-10-12 16:12:45,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:45,298 INFO L225 Difference]: With dead ends: 315 [2020-10-12 16:12:45,298 INFO L226 Difference]: Without dead ends: 298 [2020-10-12 16:12:45,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:12:45,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-12 16:12:45,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 184. [2020-10-12 16:12:45,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-12 16:12:45,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 250 transitions. [2020-10-12 16:12:45,333 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 250 transitions. Word has length 28 [2020-10-12 16:12:45,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:45,333 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 250 transitions. [2020-10-12 16:12:45,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:12:45,334 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 250 transitions. [2020-10-12 16:12:45,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 16:12:45,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:45,334 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:45,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 16:12:45,335 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:45,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:45,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1577917242, now seen corresponding path program 19 times [2020-10-12 16:12:45,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:45,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449212248] [2020-10-12 16:12:45,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:45,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:45,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:45,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:45,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 16:12:45,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:12:45,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 293 [2020-10-12 16:12:45,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:45,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:12:45,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 16:12:45,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:12:45,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:45,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:45,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:45,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:45,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:45,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:45,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:45,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:45,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:45,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:45,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:45,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-12 16:12:45,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449212248] [2020-10-12 16:12:45,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:45,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:12:45,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239511610] [2020-10-12 16:12:45,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:12:45,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:45,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:12:45,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:12:45,741 INFO L87 Difference]: Start difference. First operand 184 states and 250 transitions. Second operand 8 states. [2020-10-12 16:12:45,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:45,865 INFO L93 Difference]: Finished difference Result 238 states and 318 transitions. [2020-10-12 16:12:45,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:12:45,866 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-12 16:12:45,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:45,867 INFO L225 Difference]: With dead ends: 238 [2020-10-12 16:12:45,867 INFO L226 Difference]: Without dead ends: 230 [2020-10-12 16:12:45,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:12:45,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-12 16:12:45,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 224. [2020-10-12 16:12:45,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-12 16:12:45,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 299 transitions. [2020-10-12 16:12:45,925 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 299 transitions. Word has length 29 [2020-10-12 16:12:45,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:45,926 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 299 transitions. [2020-10-12 16:12:45,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:12:45,926 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 299 transitions. [2020-10-12 16:12:45,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 16:12:45,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:45,928 INFO L422 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:45,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 16:12:45,928 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:45,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:45,929 INFO L82 PathProgramCache]: Analyzing trace with hash -237528089, now seen corresponding path program 19 times [2020-10-12 16:12:45,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:45,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848987761] [2020-10-12 16:12:45,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:45,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:45,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:46,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:46,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 16:12:46,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:12:46,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 988 [2020-10-12 16:12:46,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:46,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:12:46,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:46,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:12:46,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:47,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:47,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:47,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:47,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:47,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:47,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:47,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:47,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:47,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:47,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:47,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:47,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848987761] [2020-10-12 16:12:47,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:47,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:12:47,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512969664] [2020-10-12 16:12:47,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:12:47,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:47,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:12:47,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:12:47,221 INFO L87 Difference]: Start difference. First operand 224 states and 299 transitions. Second operand 17 states. [2020-10-12 16:12:47,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:47,992 INFO L93 Difference]: Finished difference Result 412 states and 607 transitions. [2020-10-12 16:12:47,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 16:12:47,993 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2020-10-12 16:12:47,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:47,995 INFO L225 Difference]: With dead ends: 412 [2020-10-12 16:12:47,995 INFO L226 Difference]: Without dead ends: 393 [2020-10-12 16:12:47,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:12:47,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-10-12 16:12:48,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 240. [2020-10-12 16:12:48,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-12 16:12:48,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 323 transitions. [2020-10-12 16:12:48,036 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 323 transitions. Word has length 29 [2020-10-12 16:12:48,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:48,036 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 323 transitions. [2020-10-12 16:12:48,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:12:48,036 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 323 transitions. [2020-10-12 16:12:48,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:12:48,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:48,037 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:48,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 16:12:48,038 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:48,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:48,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1635256468, now seen corresponding path program 20 times [2020-10-12 16:12:48,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:48,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328960896] [2020-10-12 16:12:48,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:48,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:48,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:48,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:48,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:48,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:48,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:12:48,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:12:48,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 837 [2020-10-12 16:12:48,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:48,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:12:48,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:48,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:12:48,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:49,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:49,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:49,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:49,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:49,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:49,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:49,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:49,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:49,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:49,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:49,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:49,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-12 16:12:49,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328960896] [2020-10-12 16:12:49,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:49,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:12:49,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329232170] [2020-10-12 16:12:49,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:12:49,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:49,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:12:49,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:12:49,189 INFO L87 Difference]: Start difference. First operand 240 states and 323 transitions. Second operand 13 states. [2020-10-12 16:12:49,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:49,975 INFO L93 Difference]: Finished difference Result 397 states and 482 transitions. [2020-10-12 16:12:49,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:12:49,975 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-12 16:12:49,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:49,978 INFO L225 Difference]: With dead ends: 397 [2020-10-12 16:12:49,978 INFO L226 Difference]: Without dead ends: 376 [2020-10-12 16:12:49,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:12:49,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-10-12 16:12:50,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 237. [2020-10-12 16:12:50,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-12 16:12:50,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 321 transitions. [2020-10-12 16:12:50,017 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 321 transitions. Word has length 30 [2020-10-12 16:12:50,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:50,018 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 321 transitions. [2020-10-12 16:12:50,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:12:50,018 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 321 transitions. [2020-10-12 16:12:50,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:12:50,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:50,019 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:50,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 16:12:50,019 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:50,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:50,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1879747484, now seen corresponding path program 21 times [2020-10-12 16:12:50,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:50,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408171371] [2020-10-12 16:12:50,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:50,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:50,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:50,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:50,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:12:50,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:12:50,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 833 [2020-10-12 16:12:50,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:50,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:12:50,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:50,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:12:50,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:51,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:51,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:51,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:51,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:51,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:51,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:51,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:51,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:51,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:51,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:51,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 16:12:51,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408171371] [2020-10-12 16:12:51,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:51,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:12:51,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360379634] [2020-10-12 16:12:51,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:12:51,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:51,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:12:51,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:12:51,027 INFO L87 Difference]: Start difference. First operand 237 states and 321 transitions. Second operand 12 states. [2020-10-12 16:12:51,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:51,349 INFO L93 Difference]: Finished difference Result 288 states and 377 transitions. [2020-10-12 16:12:51,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:12:51,350 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-12 16:12:51,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:51,351 INFO L225 Difference]: With dead ends: 288 [2020-10-12 16:12:51,351 INFO L226 Difference]: Without dead ends: 273 [2020-10-12 16:12:51,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:12:51,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-12 16:12:51,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 237. [2020-10-12 16:12:51,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-12 16:12:51,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 320 transitions. [2020-10-12 16:12:51,390 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 320 transitions. Word has length 30 [2020-10-12 16:12:51,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:51,390 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 320 transitions. [2020-10-12 16:12:51,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:12:51,390 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 320 transitions. [2020-10-12 16:12:51,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:12:51,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:51,391 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:51,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 16:12:51,392 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:51,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:51,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1421701084, now seen corresponding path program 22 times [2020-10-12 16:12:51,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:51,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984165087] [2020-10-12 16:12:51,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:51,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:51,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:51,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:51,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:51,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:12:51,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:12:51,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-12 16:12:51,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:51,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:12:51,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:12:51,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:12:51,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:51,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:51,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:51,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:51,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:51,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:51,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:51,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:51,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:51,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:51,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:51,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:51,838 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-12 16:12:51,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984165087] [2020-10-12 16:12:51,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:51,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:12:51,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861644870] [2020-10-12 16:12:51,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:12:51,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:51,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:12:51,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:12:51,840 INFO L87 Difference]: Start difference. First operand 237 states and 320 transitions. Second operand 11 states. [2020-10-12 16:12:52,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:52,281 INFO L93 Difference]: Finished difference Result 251 states and 341 transitions. [2020-10-12 16:12:52,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:12:52,282 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-12 16:12:52,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:52,283 INFO L225 Difference]: With dead ends: 251 [2020-10-12 16:12:52,284 INFO L226 Difference]: Without dead ends: 246 [2020-10-12 16:12:52,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:12:52,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-12 16:12:52,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 241. [2020-10-12 16:12:52,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-12 16:12:52,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 324 transitions. [2020-10-12 16:12:52,322 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 324 transitions. Word has length 30 [2020-10-12 16:12:52,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:52,323 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 324 transitions. [2020-10-12 16:12:52,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:12:52,323 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 324 transitions. [2020-10-12 16:12:52,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:12:52,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:52,324 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:52,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 16:12:52,324 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:52,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:52,325 INFO L82 PathProgramCache]: Analyzing trace with hash 559648122, now seen corresponding path program 9 times [2020-10-12 16:12:52,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:52,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613827456] [2020-10-12 16:12:52,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:52,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:52,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:52,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:52,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:53,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:53,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:12:53,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:12:53,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1536 [2020-10-12 16:12:53,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:53,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:12:53,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 16:12:53,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:12:53,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:54,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:54,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:54,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:54,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:54,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:54,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:54,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:54,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:54,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:54,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:54,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:54,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-12 16:12:54,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613827456] [2020-10-12 16:12:54,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:54,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:12:54,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053168319] [2020-10-12 16:12:54,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:12:54,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:54,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:12:54,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:12:54,168 INFO L87 Difference]: Start difference. First operand 241 states and 324 transitions. Second operand 14 states. [2020-10-12 16:12:57,410 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-10-12 16:13:02,602 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 33 [2020-10-12 16:13:05,260 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-10-12 16:13:05,502 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-10-12 16:13:07,951 WARN L193 SmtUtils]: Spent 2.34 s on a formula simplification that was a NOOP. DAG size: 40 [2020-10-12 16:13:11,303 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-10-12 16:13:11,830 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-10-12 16:13:13,949 WARN L838 $PredicateComparison]: unable to prove that (and (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 4)) 4294967296)) 4294967298)) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 3)) 4294967296)) 4294967297)) (<= c_main_~y~0 c_main_~z~0) (<= c_main_~y~0 (+ (* 4294967296 (div (+ c_main_~y~0 (- 5)) 4294967296)) 4294967299)) (<= c_main_~z~0 c_main_~y~0) (<= (+ (* 4294967296 (div c_main_~y~0 4294967296)) 1) c_main_~y~0)) is different from false [2020-10-12 16:13:14,324 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-10-12 16:13:14,946 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-10-12 16:13:21,220 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 33 [2020-10-12 16:13:22,095 WARN L193 SmtUtils]: Spent 627.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-10-12 16:13:22,448 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-10-12 16:13:25,363 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-10-12 16:13:27,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:27,660 INFO L93 Difference]: Finished difference Result 584 states and 693 transitions. [2020-10-12 16:13:27,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 16:13:27,661 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2020-10-12 16:13:27,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:27,663 INFO L225 Difference]: With dead ends: 584 [2020-10-12 16:13:27,663 INFO L226 Difference]: Without dead ends: 555 [2020-10-12 16:13:27,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=322, Invalid=1481, Unknown=7, NotChecked=82, Total=1892 [2020-10-12 16:13:27,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-10-12 16:13:27,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 261. [2020-10-12 16:13:27,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-12 16:13:27,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 338 transitions. [2020-10-12 16:13:27,709 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 338 transitions. Word has length 30 [2020-10-12 16:13:27,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:27,710 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 338 transitions. [2020-10-12 16:13:27,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:13:27,710 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 338 transitions. [2020-10-12 16:13:27,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:13:27,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:27,711 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:27,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 16:13:27,711 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:27,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:27,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1716040044, now seen corresponding path program 23 times [2020-10-12 16:13:27,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:27,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612797858] [2020-10-12 16:13:27,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:27,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:27,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:28,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:28,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:13:28,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:13:28,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-10-12 16:13:28,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:28,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:13:28,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:28,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:13:28,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:28,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:28,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:28,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:28,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:28,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:28,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:28,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:28,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:28,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:28,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:28,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:28,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 16:13:28,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612797858] [2020-10-12 16:13:28,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:28,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:13:28,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180593595] [2020-10-12 16:13:28,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:13:28,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:28,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:13:28,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:13:28,260 INFO L87 Difference]: Start difference. First operand 261 states and 338 transitions. Second operand 12 states. [2020-10-12 16:13:28,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:28,655 INFO L93 Difference]: Finished difference Result 332 states and 415 transitions. [2020-10-12 16:13:28,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:13:28,656 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-12 16:13:28,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:28,658 INFO L225 Difference]: With dead ends: 332 [2020-10-12 16:13:28,658 INFO L226 Difference]: Without dead ends: 317 [2020-10-12 16:13:28,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:13:28,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-10-12 16:13:28,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 261. [2020-10-12 16:13:28,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-12 16:13:28,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 337 transitions. [2020-10-12 16:13:28,701 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 337 transitions. Word has length 30 [2020-10-12 16:13:28,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:28,701 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 337 transitions. [2020-10-12 16:13:28,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:13:28,701 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 337 transitions. [2020-10-12 16:13:28,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:13:28,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:28,702 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:28,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 16:13:28,702 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:28,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:28,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1337282148, now seen corresponding path program 24 times [2020-10-12 16:13:28,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:28,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858098358] [2020-10-12 16:13:28,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:28,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:28,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:28,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:29,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:29,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:13:29,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:13:29,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 304 [2020-10-12 16:13:29,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:29,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:13:29,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:29,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:13:29,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:29,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:29,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:29,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:29,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:29,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:29,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:29,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:29,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:29,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:29,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:29,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:29,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:13:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-12 16:13:29,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858098358] [2020-10-12 16:13:29,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:29,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:13:29,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367765957] [2020-10-12 16:13:29,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:13:29,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:29,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:13:29,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:13:29,190 INFO L87 Difference]: Start difference. First operand 261 states and 337 transitions. Second operand 12 states. [2020-10-12 16:13:29,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:29,600 INFO L93 Difference]: Finished difference Result 349 states and 432 transitions. [2020-10-12 16:13:29,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:13:29,601 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-12 16:13:29,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:29,603 INFO L225 Difference]: With dead ends: 349 [2020-10-12 16:13:29,603 INFO L226 Difference]: Without dead ends: 334 [2020-10-12 16:13:29,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:13:29,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-12 16:13:29,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 261. [2020-10-12 16:13:29,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-12 16:13:29,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 336 transitions. [2020-10-12 16:13:29,638 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 336 transitions. Word has length 30 [2020-10-12 16:13:29,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:29,638 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 336 transitions. [2020-10-12 16:13:29,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:13:29,638 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 336 transitions. [2020-10-12 16:13:29,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:13:29,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:29,639 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:29,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 16:13:29,640 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:29,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:29,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1158681748, now seen corresponding path program 20 times [2020-10-12 16:13:29,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:29,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333323965] [2020-10-12 16:13:29,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:29,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:29,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:29,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:29,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:13:29,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:13:29,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-12 16:13:29,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:29,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:13:29,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:29,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:13:29,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:30,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:30,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:30,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:30,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:30,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:30,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:30,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:30,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:30,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:30,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:30,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:30,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-12 16:13:30,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333323965] [2020-10-12 16:13:30,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:30,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:13:30,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899200679] [2020-10-12 16:13:30,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:13:30,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:30,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:13:30,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:13:30,017 INFO L87 Difference]: Start difference. First operand 261 states and 336 transitions. Second operand 12 states. [2020-10-12 16:13:30,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:30,405 INFO L93 Difference]: Finished difference Result 367 states and 450 transitions. [2020-10-12 16:13:30,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:13:30,406 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-12 16:13:30,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:30,407 INFO L225 Difference]: With dead ends: 367 [2020-10-12 16:13:30,408 INFO L226 Difference]: Without dead ends: 352 [2020-10-12 16:13:30,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:13:30,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-12 16:13:30,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 261. [2020-10-12 16:13:30,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-12 16:13:30,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 335 transitions. [2020-10-12 16:13:30,450 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 335 transitions. Word has length 30 [2020-10-12 16:13:30,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:30,451 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 335 transitions. [2020-10-12 16:13:30,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:13:30,451 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 335 transitions. [2020-10-12 16:13:30,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 16:13:30,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:30,452 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:30,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-12 16:13:30,452 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:30,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:30,453 INFO L82 PathProgramCache]: Analyzing trace with hash -928044148, now seen corresponding path program 25 times [2020-10-12 16:13:30,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:30,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195038827] [2020-10-12 16:13:30,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:30,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:30,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:30,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:31,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:31,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:13:31,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:13:31,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1030 [2020-10-12 16:13:31,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:31,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:13:31,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:31,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:13:31,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:31,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:31,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:31,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:31,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:31,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:31,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:31,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:13:31,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:31,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:31,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:31,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:31,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-12 16:13:31,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195038827] [2020-10-12 16:13:31,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:31,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:13:31,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741487672] [2020-10-12 16:13:31,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:13:31,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:31,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:13:31,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:13:31,685 INFO L87 Difference]: Start difference. First operand 261 states and 335 transitions. Second operand 13 states. [2020-10-12 16:13:32,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:32,176 INFO L93 Difference]: Finished difference Result 322 states and 402 transitions. [2020-10-12 16:13:32,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:13:32,176 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-12 16:13:32,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:32,178 INFO L225 Difference]: With dead ends: 322 [2020-10-12 16:13:32,178 INFO L226 Difference]: Without dead ends: 306 [2020-10-12 16:13:32,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:13:32,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-12 16:13:32,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 261. [2020-10-12 16:13:32,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-12 16:13:32,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 334 transitions. [2020-10-12 16:13:32,223 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 334 transitions. Word has length 32 [2020-10-12 16:13:32,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:32,223 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 334 transitions. [2020-10-12 16:13:32,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:13:32,223 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 334 transitions. [2020-10-12 16:13:32,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 16:13:32,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:32,224 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:32,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-12 16:13:32,225 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:32,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:32,225 INFO L82 PathProgramCache]: Analyzing trace with hash 872332460, now seen corresponding path program 10 times [2020-10-12 16:13:32,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:32,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262494003] [2020-10-12 16:13:32,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:32,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:32,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:32,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:32,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:13:32,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:13:32,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 486 [2020-10-12 16:13:32,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:32,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:13:32,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:13:32,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:13:32,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:32,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:32,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:32,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:32,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:32,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:32,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:32,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:32,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:32,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:32,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:32,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:32,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 16:13:32,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262494003] [2020-10-12 16:13:32,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:32,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:13:32,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021043904] [2020-10-12 16:13:32,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:13:32,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:32,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:13:32,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:13:32,897 INFO L87 Difference]: Start difference. First operand 261 states and 334 transitions. Second operand 11 states. [2020-10-12 16:13:34,308 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 29 DAG size of output: 15 [2020-10-12 16:13:45,062 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2020-10-12 16:13:47,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:47,430 INFO L93 Difference]: Finished difference Result 308 states and 399 transitions. [2020-10-12 16:13:47,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:13:47,431 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-12 16:13:47,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:47,432 INFO L225 Difference]: With dead ends: 308 [2020-10-12 16:13:47,432 INFO L226 Difference]: Without dead ends: 303 [2020-10-12 16:13:47,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=129, Invalid=373, Unknown=4, NotChecked=0, Total=506 [2020-10-12 16:13:47,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-12 16:13:47,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 291. [2020-10-12 16:13:47,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-10-12 16:13:47,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 374 transitions. [2020-10-12 16:13:47,469 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 374 transitions. Word has length 32 [2020-10-12 16:13:47,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:47,469 INFO L479 AbstractCegarLoop]: Abstraction has 291 states and 374 transitions. [2020-10-12 16:13:47,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:13:47,469 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 374 transitions. [2020-10-12 16:13:47,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 16:13:47,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:47,470 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:47,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-12 16:13:47,471 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:47,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:47,471 INFO L82 PathProgramCache]: Analyzing trace with hash 456275770, now seen corresponding path program 26 times [2020-10-12 16:13:47,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:47,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554598596] [2020-10-12 16:13:47,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:47,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:47,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:47,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:47,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:13:47,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:13:47,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 422 [2020-10-12 16:13:47,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:47,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:13:47,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:47,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:13:47,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:48,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:48,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:48,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:48,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:48,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:48,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:48,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:48,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:48,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:48,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:48,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-12 16:13:48,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554598596] [2020-10-12 16:13:48,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:48,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:13:48,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834299491] [2020-10-12 16:13:48,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:13:48,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:48,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:13:48,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:13:48,105 INFO L87 Difference]: Start difference. First operand 291 states and 374 transitions. Second operand 13 states. [2020-10-12 16:13:48,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:48,643 INFO L93 Difference]: Finished difference Result 380 states and 470 transitions. [2020-10-12 16:13:48,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:13:48,644 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-12 16:13:48,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:48,646 INFO L225 Difference]: With dead ends: 380 [2020-10-12 16:13:48,646 INFO L226 Difference]: Without dead ends: 364 [2020-10-12 16:13:48,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:13:48,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-10-12 16:13:48,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 291. [2020-10-12 16:13:48,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-10-12 16:13:48,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 373 transitions. [2020-10-12 16:13:48,701 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 373 transitions. Word has length 32 [2020-10-12 16:13:48,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:48,702 INFO L479 AbstractCegarLoop]: Abstraction has 291 states and 373 transitions. [2020-10-12 16:13:48,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:13:48,702 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 373 transitions. [2020-10-12 16:13:48,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 16:13:48,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:48,703 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:48,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-12 16:13:48,703 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:48,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:48,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1332215244, now seen corresponding path program 27 times [2020-10-12 16:13:48,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:48,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123536243] [2020-10-12 16:13:48,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:48,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:48,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:49,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:49,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:13:49,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:13:49,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 294 [2020-10-12 16:13:49,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:49,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:13:49,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:49,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:13:49,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:49,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:49,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:49,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:49,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:49,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:49,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:49,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:49,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:49,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:49,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:49,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-12 16:13:49,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123536243] [2020-10-12 16:13:49,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:49,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:13:49,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540664661] [2020-10-12 16:13:49,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:13:49,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:49,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:13:49,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:13:49,201 INFO L87 Difference]: Start difference. First operand 291 states and 373 transitions. Second operand 13 states. [2020-10-12 16:13:49,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:49,682 INFO L93 Difference]: Finished difference Result 399 states and 489 transitions. [2020-10-12 16:13:49,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:13:49,682 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-12 16:13:49,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:49,684 INFO L225 Difference]: With dead ends: 399 [2020-10-12 16:13:49,684 INFO L226 Difference]: Without dead ends: 383 [2020-10-12 16:13:49,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:13:49,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-10-12 16:13:49,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 291. [2020-10-12 16:13:49,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-10-12 16:13:49,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 372 transitions. [2020-10-12 16:13:49,719 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 372 transitions. Word has length 32 [2020-10-12 16:13:49,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:49,719 INFO L479 AbstractCegarLoop]: Abstraction has 291 states and 372 transitions. [2020-10-12 16:13:49,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:13:49,720 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 372 transitions. [2020-10-12 16:13:49,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 16:13:49,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:49,721 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:49,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-12 16:13:49,721 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:49,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:49,721 INFO L82 PathProgramCache]: Analyzing trace with hash -856285958, now seen corresponding path program 21 times [2020-10-12 16:13:49,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:49,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431226404] [2020-10-12 16:13:49,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:49,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:49,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:49,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:49,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:13:49,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:13:49,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-12 16:13:49,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:49,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:13:49,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:49,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:13:49,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:50,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:50,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:50,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:50,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:50,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:50,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:50,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:50,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:50,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:50,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:50,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:50,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-12 16:13:50,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431226404] [2020-10-12 16:13:50,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:50,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:13:50,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592578792] [2020-10-12 16:13:50,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:13:50,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:50,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:13:50,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:13:50,133 INFO L87 Difference]: Start difference. First operand 291 states and 372 transitions. Second operand 13 states. [2020-10-12 16:13:50,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:50,655 INFO L93 Difference]: Finished difference Result 419 states and 509 transitions. [2020-10-12 16:13:50,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:13:50,656 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-10-12 16:13:50,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:50,658 INFO L225 Difference]: With dead ends: 419 [2020-10-12 16:13:50,658 INFO L226 Difference]: Without dead ends: 403 [2020-10-12 16:13:50,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:13:50,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-10-12 16:13:50,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 291. [2020-10-12 16:13:50,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-10-12 16:13:50,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 371 transitions. [2020-10-12 16:13:50,704 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 371 transitions. Word has length 32 [2020-10-12 16:13:50,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:50,704 INFO L479 AbstractCegarLoop]: Abstraction has 291 states and 371 transitions. [2020-10-12 16:13:50,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:13:50,704 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 371 transitions. [2020-10-12 16:13:50,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 16:13:50,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:50,705 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:50,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-12 16:13:50,705 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:50,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:50,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1219023206, now seen corresponding path program 11 times [2020-10-12 16:13:50,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:50,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694792981] [2020-10-12 16:13:50,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:50,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:50,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:50,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:53,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:53,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 16:13:53,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:13:53,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2994 [2020-10-12 16:13:53,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:53,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:13:53,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:53,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:13:53,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:53,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:53,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:53,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:53,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:53,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:53,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:53,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:53,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:53,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:53,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:53,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:53,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 16:13:53,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694792981] [2020-10-12 16:13:53,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:53,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:13:53,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807614082] [2020-10-12 16:13:53,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:13:53,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:53,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:13:53,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:13:53,993 INFO L87 Difference]: Start difference. First operand 291 states and 371 transitions. Second operand 16 states. [2020-10-12 16:13:55,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:55,298 INFO L93 Difference]: Finished difference Result 365 states and 453 transitions. [2020-10-12 16:13:55,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 16:13:55,299 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-10-12 16:13:55,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:55,300 INFO L225 Difference]: With dead ends: 365 [2020-10-12 16:13:55,300 INFO L226 Difference]: Without dead ends: 327 [2020-10-12 16:13:55,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=153, Invalid=2009, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:13:55,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-10-12 16:13:55,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 290. [2020-10-12 16:13:55,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-10-12 16:13:55,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 366 transitions. [2020-10-12 16:13:55,335 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 366 transitions. Word has length 33 [2020-10-12 16:13:55,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:55,335 INFO L479 AbstractCegarLoop]: Abstraction has 290 states and 366 transitions. [2020-10-12 16:13:55,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:13:55,335 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 366 transitions. [2020-10-12 16:13:55,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:13:55,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:55,336 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:55,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-12 16:13:55,336 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:55,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:55,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1917292964, now seen corresponding path program 28 times [2020-10-12 16:13:55,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:55,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939170671] [2020-10-12 16:13:55,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:55,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:55,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:55,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:55,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:56,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:56,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:56,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:13:56,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:13:56,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1148 [2020-10-12 16:13:56,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:56,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 16:13:56,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:56,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 16:13:56,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:57,315 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2020-10-12 16:13:57,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:57,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:57,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:57,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:57,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:57,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:57,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:57,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:57,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:57,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:57,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:13:57,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939170671] [2020-10-12 16:13:57,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:57,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:13:57,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21964405] [2020-10-12 16:13:57,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:13:57,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:57,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:13:57,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:13:57,542 INFO L87 Difference]: Start difference. First operand 290 states and 366 transitions. Second operand 21 states. [2020-10-12 16:13:58,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:58,949 INFO L93 Difference]: Finished difference Result 307 states and 383 transitions. [2020-10-12 16:13:58,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:13:58,950 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 34 [2020-10-12 16:13:58,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:58,952 INFO L225 Difference]: With dead ends: 307 [2020-10-12 16:13:58,953 INFO L226 Difference]: Without dead ends: 302 [2020-10-12 16:13:58,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:13:58,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-10-12 16:13:58,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 297. [2020-10-12 16:13:58,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-12 16:13:58,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 373 transitions. [2020-10-12 16:13:58,990 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 373 transitions. Word has length 34 [2020-10-12 16:13:58,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:58,990 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 373 transitions. [2020-10-12 16:13:58,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:13:58,990 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 373 transitions. [2020-10-12 16:13:58,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:13:58,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:58,991 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:58,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-12 16:13:58,992 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:58,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:58,992 INFO L82 PathProgramCache]: Analyzing trace with hash 753302620, now seen corresponding path program 29 times [2020-10-12 16:13:58,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:58,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761918019] [2020-10-12 16:13:58,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:59,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:59,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:59,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:59,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:59,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:13:59,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:13:59,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 750 [2020-10-12 16:13:59,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:59,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:13:59,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:59,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:13:59,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:59,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:59,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:59,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:59,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:59,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:59,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:13:59,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:59,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:59,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:59,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:59,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:59,976 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-12 16:13:59,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761918019] [2020-10-12 16:13:59,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:59,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:13:59,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774580637] [2020-10-12 16:13:59,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:13:59,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:59,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:13:59,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:13:59,978 INFO L87 Difference]: Start difference. First operand 297 states and 373 transitions. Second operand 14 states. [2020-10-12 16:14:00,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:00,642 INFO L93 Difference]: Finished difference Result 380 states and 463 transitions. [2020-10-12 16:14:00,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:14:00,643 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-12 16:14:00,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:00,644 INFO L225 Difference]: With dead ends: 380 [2020-10-12 16:14:00,644 INFO L226 Difference]: Without dead ends: 363 [2020-10-12 16:14:00,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:14:00,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-12 16:14:00,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 297. [2020-10-12 16:14:00,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-12 16:14:00,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 372 transitions. [2020-10-12 16:14:00,678 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 372 transitions. Word has length 34 [2020-10-12 16:14:00,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:00,678 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 372 transitions. [2020-10-12 16:14:00,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:14:00,679 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 372 transitions. [2020-10-12 16:14:00,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:14:00,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:00,680 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:00,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-12 16:14:00,680 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:00,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:00,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1413136916, now seen corresponding path program 30 times [2020-10-12 16:14:00,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:00,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9275331] [2020-10-12 16:14:00,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:00,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:00,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:01,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:01,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:14:01,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:14:01,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 583 [2020-10-12 16:14:01,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:01,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:14:01,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:01,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:14:01,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:01,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:01,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:01,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:01,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:01,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:01,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:01,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:01,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:01,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:01,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:01,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-12 16:14:01,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9275331] [2020-10-12 16:14:01,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:01,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:14:01,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967671398] [2020-10-12 16:14:01,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:14:01,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:01,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:14:01,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:14:01,510 INFO L87 Difference]: Start difference. First operand 297 states and 372 transitions. Second operand 14 states. [2020-10-12 16:14:02,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:02,083 INFO L93 Difference]: Finished difference Result 399 states and 482 transitions. [2020-10-12 16:14:02,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 16:14:02,084 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-12 16:14:02,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:02,086 INFO L225 Difference]: With dead ends: 399 [2020-10-12 16:14:02,086 INFO L226 Difference]: Without dead ends: 382 [2020-10-12 16:14:02,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:14:02,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-10-12 16:14:02,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 297. [2020-10-12 16:14:02,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-12 16:14:02,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 371 transitions. [2020-10-12 16:14:02,125 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 371 transitions. Word has length 34 [2020-10-12 16:14:02,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:02,125 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 371 transitions. [2020-10-12 16:14:02,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:14:02,125 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 371 transitions. [2020-10-12 16:14:02,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:14:02,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:02,126 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:02,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-12 16:14:02,127 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:02,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:02,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1010829916, now seen corresponding path program 31 times [2020-10-12 16:14:02,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:02,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774449481] [2020-10-12 16:14:02,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:02,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:02,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:02,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:02,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:02,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:14:02,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:14:02,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-12 16:14:02,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:02,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:14:02,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:02,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:14:02,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:02,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:02,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:02,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:02,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:02,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:02,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:02,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:02,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:02,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:02,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:02,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:02,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-12 16:14:02,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774449481] [2020-10-12 16:14:02,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:02,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:14:02,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450066052] [2020-10-12 16:14:02,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:14:02,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:02,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:14:02,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:14:02,745 INFO L87 Difference]: Start difference. First operand 297 states and 371 transitions. Second operand 14 states. [2020-10-12 16:14:03,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:03,287 INFO L93 Difference]: Finished difference Result 419 states and 502 transitions. [2020-10-12 16:14:03,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:14:03,288 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-12 16:14:03,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:03,290 INFO L225 Difference]: With dead ends: 419 [2020-10-12 16:14:03,290 INFO L226 Difference]: Without dead ends: 402 [2020-10-12 16:14:03,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:14:03,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-10-12 16:14:03,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 297. [2020-10-12 16:14:03,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-12 16:14:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 370 transitions. [2020-10-12 16:14:03,331 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 370 transitions. Word has length 34 [2020-10-12 16:14:03,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:03,331 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 370 transitions. [2020-10-12 16:14:03,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:14:03,332 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 370 transitions. [2020-10-12 16:14:03,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:14:03,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:03,332 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:03,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-12 16:14:03,333 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:03,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:03,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1543376916, now seen corresponding path program 22 times [2020-10-12 16:14:03,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:03,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647753170] [2020-10-12 16:14:03,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:03,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:03,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:03,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:03,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:14:03,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:14:03,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-12 16:14:03,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:03,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:14:03,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:03,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:14:03,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:03,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:03,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:03,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:03,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:03,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:03,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:03,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:03,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:03,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:03,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:03,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-12 16:14:03,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647753170] [2020-10-12 16:14:03,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:03,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:14:03,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804142514] [2020-10-12 16:14:03,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:14:03,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:03,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:14:03,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:14:03,810 INFO L87 Difference]: Start difference. First operand 297 states and 370 transitions. Second operand 14 states. [2020-10-12 16:14:04,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:04,344 INFO L93 Difference]: Finished difference Result 440 states and 523 transitions. [2020-10-12 16:14:04,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:14:04,345 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-10-12 16:14:04,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:04,347 INFO L225 Difference]: With dead ends: 440 [2020-10-12 16:14:04,347 INFO L226 Difference]: Without dead ends: 423 [2020-10-12 16:14:04,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:14:04,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-12 16:14:04,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 297. [2020-10-12 16:14:04,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-10-12 16:14:04,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 369 transitions. [2020-10-12 16:14:04,380 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 369 transitions. Word has length 34 [2020-10-12 16:14:04,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:04,381 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 369 transitions. [2020-10-12 16:14:04,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:14:04,381 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 369 transitions. [2020-10-12 16:14:04,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:14:04,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:04,381 INFO L422 BasicCegarLoop]: trace histogram [14, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:04,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-12 16:14:04,382 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:04,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:04,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1378749332, now seen corresponding path program 23 times [2020-10-12 16:14:04,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:04,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718689729] [2020-10-12 16:14:04,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:04,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:04,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:04,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:05,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:05,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:14:05,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:05,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1248 [2020-10-12 16:14:05,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:05,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:14:05,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:05,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:14:05,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:05,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:06,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:06,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:06,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:06,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:06,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:06,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:06,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:06,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:06,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:06,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:06,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:06,004 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:06,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718689729] [2020-10-12 16:14:06,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:06,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:14:06,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855173672] [2020-10-12 16:14:06,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:14:06,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:06,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:14:06,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:14:06,005 INFO L87 Difference]: Start difference. First operand 297 states and 369 transitions. Second operand 18 states. [2020-10-12 16:14:06,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:06,829 INFO L93 Difference]: Finished difference Result 529 states and 716 transitions. [2020-10-12 16:14:06,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:14:06,829 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-10-12 16:14:06,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:06,831 INFO L225 Difference]: With dead ends: 529 [2020-10-12 16:14:06,831 INFO L226 Difference]: Without dead ends: 505 [2020-10-12 16:14:06,832 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:14:06,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2020-10-12 16:14:06,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 315. [2020-10-12 16:14:06,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-10-12 16:14:06,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 396 transitions. [2020-10-12 16:14:06,869 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 396 transitions. Word has length 34 [2020-10-12 16:14:06,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:06,869 INFO L479 AbstractCegarLoop]: Abstraction has 315 states and 396 transitions. [2020-10-12 16:14:06,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:14:06,869 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 396 transitions. [2020-10-12 16:14:06,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 16:14:06,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:06,870 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:06,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-12 16:14:06,870 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:06,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:06,870 INFO L82 PathProgramCache]: Analyzing trace with hash 728998038, now seen corresponding path program 32 times [2020-10-12 16:14:06,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:06,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145061210] [2020-10-12 16:14:06,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:06,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:06,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:07,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:07,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:07,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:07,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 16:14:07,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:07,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 820 [2020-10-12 16:14:07,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:07,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 16:14:07,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:07,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 16:14:07,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:08,557 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 32 [2020-10-12 16:14:08,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:08,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:08,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:08,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:08,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:08,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:08,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:08,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:08,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:08,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:08,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:08,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145061210] [2020-10-12 16:14:08,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:08,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:14:08,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769190022] [2020-10-12 16:14:08,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:14:08,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:08,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:14:08,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:14:08,752 INFO L87 Difference]: Start difference. First operand 315 states and 396 transitions. Second operand 21 states. [2020-10-12 16:14:09,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:09,984 INFO L93 Difference]: Finished difference Result 327 states and 408 transitions. [2020-10-12 16:14:09,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:14:09,985 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-12 16:14:09,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:09,987 INFO L225 Difference]: With dead ends: 327 [2020-10-12 16:14:09,987 INFO L226 Difference]: Without dead ends: 322 [2020-10-12 16:14:09,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:14:09,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-10-12 16:14:10,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 316. [2020-10-12 16:14:10,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-10-12 16:14:10,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 397 transitions. [2020-10-12 16:14:10,025 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 397 transitions. Word has length 35 [2020-10-12 16:14:10,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:10,026 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 397 transitions. [2020-10-12 16:14:10,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:14:10,026 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 397 transitions. [2020-10-12 16:14:10,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 16:14:10,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:10,027 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:10,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-12 16:14:10,027 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:10,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:10,027 INFO L82 PathProgramCache]: Analyzing trace with hash -261517050, now seen corresponding path program 33 times [2020-10-12 16:14:10,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:10,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546536399] [2020-10-12 16:14:10,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:10,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:10,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:10,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:10,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 16:14:10,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:14:10,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 566 [2020-10-12 16:14:10,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:10,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:14:10,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:14:10,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:14:10,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:10,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:10,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:10,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:10,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:10,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:10,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:10,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:10,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:10,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:10,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:10,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:10,738 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-12 16:14:10,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546536399] [2020-10-12 16:14:10,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:10,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:14:10,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804695374] [2020-10-12 16:14:10,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:14:10,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:10,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:14:10,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:14:10,739 INFO L87 Difference]: Start difference. First operand 316 states and 397 transitions. Second operand 9 states. [2020-10-12 16:14:13,193 WARN L193 SmtUtils]: Spent 2.29 s on a formula simplification that was a NOOP. DAG size: 42 [2020-10-12 16:14:13,719 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-10-12 16:14:19,182 WARN L193 SmtUtils]: Spent 2.28 s on a formula simplification that was a NOOP. DAG size: 35 [2020-10-12 16:14:19,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:19,202 INFO L93 Difference]: Finished difference Result 341 states and 425 transitions. [2020-10-12 16:14:19,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 16:14:19,204 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-12 16:14:19,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:19,206 INFO L225 Difference]: With dead ends: 341 [2020-10-12 16:14:19,206 INFO L226 Difference]: Without dead ends: 336 [2020-10-12 16:14:19,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:14:19,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-12 16:14:19,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 316. [2020-10-12 16:14:19,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-10-12 16:14:19,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 397 transitions. [2020-10-12 16:14:19,245 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 397 transitions. Word has length 35 [2020-10-12 16:14:19,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:19,245 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 397 transitions. [2020-10-12 16:14:19,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:14:19,245 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 397 transitions. [2020-10-12 16:14:19,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 16:14:19,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:19,246 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:19,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-12 16:14:19,246 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:19,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:19,247 INFO L82 PathProgramCache]: Analyzing trace with hash 885709334, now seen corresponding path program 12 times [2020-10-12 16:14:19,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:19,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888235249] [2020-10-12 16:14:19,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:19,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:19,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:19,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:19,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 16:14:19,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:14:19,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 544 [2020-10-12 16:14:19,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:19,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:14:19,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:14:19,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 16:14:19,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:19,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:19,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:19,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:19,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:19,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:19,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:19,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:19,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:19,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:19,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:19,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-12 16:14:19,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888235249] [2020-10-12 16:14:19,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:19,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:14:19,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371791816] [2020-10-12 16:14:19,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:14:19,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:19,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:14:19,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:14:19,984 INFO L87 Difference]: Start difference. First operand 316 states and 397 transitions. Second operand 10 states. [2020-10-12 16:14:21,703 WARN L193 SmtUtils]: Spent 1000.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-10-12 16:14:22,164 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-10-12 16:14:25,513 WARN L193 SmtUtils]: Spent 629.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-12 16:14:26,880 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-10-12 16:14:30,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:30,503 INFO L93 Difference]: Finished difference Result 370 states and 466 transitions. [2020-10-12 16:14:30,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:14:30,504 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-12 16:14:30,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:30,505 INFO L225 Difference]: With dead ends: 370 [2020-10-12 16:14:30,506 INFO L226 Difference]: Without dead ends: 365 [2020-10-12 16:14:30,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:14:30,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-10-12 16:14:30,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 347. [2020-10-12 16:14:30,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2020-10-12 16:14:30,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 438 transitions. [2020-10-12 16:14:30,550 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 438 transitions. Word has length 35 [2020-10-12 16:14:30,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:30,550 INFO L479 AbstractCegarLoop]: Abstraction has 347 states and 438 transitions. [2020-10-12 16:14:30,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:14:30,550 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 438 transitions. [2020-10-12 16:14:30,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 16:14:30,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:30,551 INFO L422 BasicCegarLoop]: trace histogram [15, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:30,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-12 16:14:30,552 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:30,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:30,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1066419897, now seen corresponding path program 24 times [2020-10-12 16:14:30,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:30,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261709964] [2020-10-12 16:14:30,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:30,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:30,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:30,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:30,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:32,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:32,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 16:14:32,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:32,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1782 [2020-10-12 16:14:32,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:32,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:14:32,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:32,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 16:14:32,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:32,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:32,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:32,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:32,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:32,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:32,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:32,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:32,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:32,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:32,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:32,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:32,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:32,719 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:32,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261709964] [2020-10-12 16:14:32,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:32,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:14:32,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410423012] [2020-10-12 16:14:32,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:14:32,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:32,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:14:32,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:14:32,720 INFO L87 Difference]: Start difference. First operand 347 states and 438 transitions. Second operand 19 states. [2020-10-12 16:14:33,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:33,634 INFO L93 Difference]: Finished difference Result 611 states and 839 transitions. [2020-10-12 16:14:33,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:14:33,635 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-12 16:14:33,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:33,638 INFO L225 Difference]: With dead ends: 611 [2020-10-12 16:14:33,638 INFO L226 Difference]: Without dead ends: 586 [2020-10-12 16:14:33,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:14:33,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-10-12 16:14:33,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 367. [2020-10-12 16:14:33,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-10-12 16:14:33,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 468 transitions. [2020-10-12 16:14:33,691 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 468 transitions. Word has length 35 [2020-10-12 16:14:33,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:33,691 INFO L479 AbstractCegarLoop]: Abstraction has 367 states and 468 transitions. [2020-10-12 16:14:33,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:14:33,691 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 468 transitions. [2020-10-12 16:14:33,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:14:33,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:33,692 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:33,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-12 16:14:33,693 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:33,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:33,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1159640476, now seen corresponding path program 34 times [2020-10-12 16:14:33,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:33,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035220348] [2020-10-12 16:14:33,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:33,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:33,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:33,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:34,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:34,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:34,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:14:34,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:34,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 777 [2020-10-12 16:14:34,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:34,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 16:14:34,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:34,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 16:14:34,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:36,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:36,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:36,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:36,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:36,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:36,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:36,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:36,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:36,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:36,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:36,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:36,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035220348] [2020-10-12 16:14:36,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:36,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 16:14:36,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757706846] [2020-10-12 16:14:36,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 16:14:36,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:36,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 16:14:36,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:14:36,074 INFO L87 Difference]: Start difference. First operand 367 states and 468 transitions. Second operand 26 states. [2020-10-12 16:14:37,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:37,977 INFO L93 Difference]: Finished difference Result 384 states and 485 transitions. [2020-10-12 16:14:37,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 16:14:37,978 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 36 [2020-10-12 16:14:37,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:37,980 INFO L225 Difference]: With dead ends: 384 [2020-10-12 16:14:37,980 INFO L226 Difference]: Without dead ends: 379 [2020-10-12 16:14:37,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=121, Invalid=1285, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:14:37,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2020-10-12 16:14:38,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 368. [2020-10-12 16:14:38,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2020-10-12 16:14:38,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 469 transitions. [2020-10-12 16:14:38,036 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 469 transitions. Word has length 36 [2020-10-12 16:14:38,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:38,036 INFO L479 AbstractCegarLoop]: Abstraction has 368 states and 469 transitions. [2020-10-12 16:14:38,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 16:14:38,037 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 469 transitions. [2020-10-12 16:14:38,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:14:38,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:38,038 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:38,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-12 16:14:38,038 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:38,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:38,039 INFO L82 PathProgramCache]: Analyzing trace with hash 518443820, now seen corresponding path program 35 times [2020-10-12 16:14:38,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:38,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107909295] [2020-10-12 16:14:38,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:38,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:38,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:38,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:38,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:14:38,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:14:38,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 405 [2020-10-12 16:14:38,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:38,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:14:38,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 16:14:38,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:14:38,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:38,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:38,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:38,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:38,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:38,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:38,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:38,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:38,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:38,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:38,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:38,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-12 16:14:38,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107909295] [2020-10-12 16:14:38,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:38,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:14:38,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900790168] [2020-10-12 16:14:38,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:14:38,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:38,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:14:38,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:14:38,641 INFO L87 Difference]: Start difference. First operand 368 states and 469 transitions. Second operand 10 states. [2020-10-12 16:14:38,861 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2020-10-12 16:14:42,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:42,595 INFO L93 Difference]: Finished difference Result 397 states and 501 transitions. [2020-10-12 16:14:42,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 16:14:42,596 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-12 16:14:42,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:42,598 INFO L225 Difference]: With dead ends: 397 [2020-10-12 16:14:42,598 INFO L226 Difference]: Without dead ends: 392 [2020-10-12 16:14:42,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=136, Invalid=513, Unknown=1, NotChecked=0, Total=650 [2020-10-12 16:14:42,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2020-10-12 16:14:42,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 368. [2020-10-12 16:14:42,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2020-10-12 16:14:42,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 469 transitions. [2020-10-12 16:14:42,662 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 469 transitions. Word has length 36 [2020-10-12 16:14:42,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:42,662 INFO L479 AbstractCegarLoop]: Abstraction has 368 states and 469 transitions. [2020-10-12 16:14:42,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:14:42,663 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 469 transitions. [2020-10-12 16:14:42,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:14:42,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:42,664 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:42,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-12 16:14:42,664 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:42,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:42,664 INFO L82 PathProgramCache]: Analyzing trace with hash 855388794, now seen corresponding path program 36 times [2020-10-12 16:14:42,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:42,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990704183] [2020-10-12 16:14:42,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:42,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:42,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:42,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:44,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:44,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:14:44,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:14:44,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1797 [2020-10-12 16:14:44,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:44,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:14:44,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:44,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:14:44,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:44,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:44,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:44,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:44,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:44,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:44,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:44,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:44,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:44,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:44,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:44,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-12 16:14:44,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990704183] [2020-10-12 16:14:44,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:44,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:14:44,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111587172] [2020-10-12 16:14:44,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:14:44,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:44,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:14:44,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:14:44,740 INFO L87 Difference]: Start difference. First operand 368 states and 469 transitions. Second operand 15 states. [2020-10-12 16:14:45,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:45,517 INFO L93 Difference]: Finished difference Result 452 states and 560 transitions. [2020-10-12 16:14:45,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:14:45,518 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-12 16:14:45,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:45,520 INFO L225 Difference]: With dead ends: 452 [2020-10-12 16:14:45,520 INFO L226 Difference]: Without dead ends: 434 [2020-10-12 16:14:45,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:14:45,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-10-12 16:14:45,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 368. [2020-10-12 16:14:45,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2020-10-12 16:14:45,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 468 transitions. [2020-10-12 16:14:45,569 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 468 transitions. Word has length 36 [2020-10-12 16:14:45,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:45,570 INFO L479 AbstractCegarLoop]: Abstraction has 368 states and 468 transitions. [2020-10-12 16:14:45,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:14:45,570 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 468 transitions. [2020-10-12 16:14:45,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:14:45,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:45,571 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:45,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-12 16:14:45,571 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:45,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:45,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1722723356, now seen corresponding path program 37 times [2020-10-12 16:14:45,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:45,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521689252] [2020-10-12 16:14:45,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:45,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:45,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:45,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:45,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:14:45,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:14:45,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-10-12 16:14:45,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:45,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:14:45,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:14:45,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 16:14:45,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:46,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:46,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:46,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:46,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:46,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:46,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:46,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:46,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:46,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:46,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:46,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-12 16:14:46,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521689252] [2020-10-12 16:14:46,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:46,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:14:46,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310682515] [2020-10-12 16:14:46,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:14:46,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:46,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:14:46,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:14:46,254 INFO L87 Difference]: Start difference. First operand 368 states and 468 transitions. Second operand 15 states. [2020-10-12 16:14:47,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:47,159 INFO L93 Difference]: Finished difference Result 393 states and 504 transitions. [2020-10-12 16:14:47,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:14:47,160 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-12 16:14:47,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:47,162 INFO L225 Difference]: With dead ends: 393 [2020-10-12 16:14:47,162 INFO L226 Difference]: Without dead ends: 388 [2020-10-12 16:14:47,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:14:47,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2020-10-12 16:14:47,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 368. [2020-10-12 16:14:47,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2020-10-12 16:14:47,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 468 transitions. [2020-10-12 16:14:47,214 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 468 transitions. Word has length 36 [2020-10-12 16:14:47,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:47,214 INFO L479 AbstractCegarLoop]: Abstraction has 368 states and 468 transitions. [2020-10-12 16:14:47,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:14:47,214 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 468 transitions. [2020-10-12 16:14:47,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:14:47,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:47,215 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:47,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-12 16:14:47,215 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:47,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:47,216 INFO L82 PathProgramCache]: Analyzing trace with hash -171984390, now seen corresponding path program 13 times [2020-10-12 16:14:47,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:47,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068822975] [2020-10-12 16:14:47,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:47,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:47,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:47,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:51,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:51,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:14:51,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:51,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4216 [2020-10-12 16:14:51,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:51,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:14:51,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:51,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:14:51,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:51,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:51,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:51,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:51,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:51,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:51,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:51,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:51,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:51,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:51,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:51,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-12 16:14:51,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068822975] [2020-10-12 16:14:51,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:51,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:14:51,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057339795] [2020-10-12 16:14:51,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:14:51,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:51,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:14:51,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:14:51,984 INFO L87 Difference]: Start difference. First operand 368 states and 468 transitions. Second operand 18 states. [2020-10-12 16:14:53,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:53,907 INFO L93 Difference]: Finished difference Result 458 states and 565 transitions. [2020-10-12 16:14:53,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-12 16:14:53,909 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-10-12 16:14:53,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:53,911 INFO L225 Difference]: With dead ends: 458 [2020-10-12 16:14:53,911 INFO L226 Difference]: Without dead ends: 443 [2020-10-12 16:14:53,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=407, Invalid=3015, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 16:14:53,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-10-12 16:14:53,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 367. [2020-10-12 16:14:53,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-10-12 16:14:53,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 465 transitions. [2020-10-12 16:14:53,973 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 465 transitions. Word has length 36 [2020-10-12 16:14:53,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:53,973 INFO L479 AbstractCegarLoop]: Abstraction has 367 states and 465 transitions. [2020-10-12 16:14:53,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:14:53,973 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 465 transitions. [2020-10-12 16:14:53,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:14:53,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:53,974 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:53,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-12 16:14:53,974 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:53,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:53,974 INFO L82 PathProgramCache]: Analyzing trace with hash 339437644, now seen corresponding path program 38 times [2020-10-12 16:14:53,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:53,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31437454] [2020-10-12 16:14:53,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:53,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:54,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:54,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:54,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:14:54,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:14:54,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1012 [2020-10-12 16:14:54,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:54,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:14:54,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:54,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:14:54,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:55,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:55,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:55,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:55,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:55,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:55,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:55,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:55,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:55,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:55,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:55,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:14:55,319 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-12 16:14:55,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31437454] [2020-10-12 16:14:55,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:55,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:14:55,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857542988] [2020-10-12 16:14:55,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:14:55,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:55,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:14:55,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:14:55,322 INFO L87 Difference]: Start difference. First operand 367 states and 465 transitions. Second operand 15 states. [2020-10-12 16:14:56,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:56,660 INFO L93 Difference]: Finished difference Result 478 states and 584 transitions. [2020-10-12 16:14:56,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 16:14:56,661 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-12 16:14:56,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:56,663 INFO L225 Difference]: With dead ends: 478 [2020-10-12 16:14:56,663 INFO L226 Difference]: Without dead ends: 460 [2020-10-12 16:14:56,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:14:56,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-12 16:14:56,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 367. [2020-10-12 16:14:56,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-10-12 16:14:56,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 464 transitions. [2020-10-12 16:14:56,747 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 464 transitions. Word has length 36 [2020-10-12 16:14:56,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:56,747 INFO L479 AbstractCegarLoop]: Abstraction has 367 states and 464 transitions. [2020-10-12 16:14:56,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:14:56,747 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 464 transitions. [2020-10-12 16:14:56,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:14:56,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:56,749 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:56,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-12 16:14:56,749 INFO L427 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:56,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:56,749 INFO L82 PathProgramCache]: Analyzing trace with hash -231395270, now seen corresponding path program 39 times [2020-10-12 16:14:56,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:56,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760195706] [2020-10-12 16:14:56,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:56,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:56,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:57,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:57,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:14:57,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:14:57,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 670 [2020-10-12 16:14:57,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:57,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:14:57,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:57,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:14:57,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:57,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:57,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:57,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:57,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:57,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:57,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:57,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:57,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:57,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:57,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:57,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:57,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-12 16:14:57,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760195706] [2020-10-12 16:14:57,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:57,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:14:57,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666739427] [2020-10-12 16:14:57,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:14:57,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:57,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:14:57,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:14:57,710 INFO L87 Difference]: Start difference. First operand 367 states and 464 transitions. Second operand 15 states.