/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-de42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:11:23,858 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:11:23,860 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:11:23,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:11:23,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:11:23,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:11:23,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:11:23,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:11:23,910 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:11:23,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:11:23,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:11:23,916 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:11:23,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:11:23,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:11:23,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:11:23,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:11:23,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:11:23,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:11:23,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:11:23,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:11:23,934 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:11:23,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:11:23,937 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:11:23,938 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:11:23,948 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:11:23,948 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:11:23,949 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:11:23,953 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:11:23,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:11:23,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:11:23,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:11:23,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:11:23,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:11:23,959 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:11:23,960 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:11:23,960 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:11:23,960 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:11:23,961 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:11:23,961 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:11:23,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:11:23,963 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:11:23,963 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 16:11:24,005 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:11:24,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:11:24,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:11:24,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:11:24,007 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:11:24,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:11:24,008 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:11:24,008 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:11:24,008 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:11:24,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:11:24,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:11:24,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:11:24,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:11:24,010 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:11:24,011 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:11:24,011 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:11:24,011 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:11:24,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:11:24,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:11:24,011 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:11:24,012 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:11:24,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:11:24,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:11:24,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:11:24,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:11:24,013 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:11:24,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:11:24,013 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:11:24,013 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:11:24,013 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 16:11:24,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:11:24,317 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:11:24,320 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:11:24,322 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:11:24,322 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:11:24,323 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de42.c [2020-10-12 16:11:24,395 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d7ea3d1d/1e145bc3eac04041b2a7925caff26ac5/FLAG1349f290e [2020-10-12 16:11:24,846 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:11:24,847 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de42.c [2020-10-12 16:11:24,852 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d7ea3d1d/1e145bc3eac04041b2a7925caff26ac5/FLAG1349f290e [2020-10-12 16:11:25,260 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d7ea3d1d/1e145bc3eac04041b2a7925caff26ac5 [2020-10-12 16:11:25,268 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:11:25,269 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:11:25,270 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:11:25,270 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:11:25,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:11:25,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:11:25" (1/1) ... [2020-10-12 16:11:25,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e37c865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:25, skipping insertion in model container [2020-10-12 16:11:25,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:11:25" (1/1) ... [2020-10-12 16:11:25,286 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:11:25,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:11:25,479 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:11:25,484 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:11:25,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:11:25,516 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:11:25,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:25 WrapperNode [2020-10-12 16:11:25,516 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:11:25,517 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:11:25,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:11:25,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:11:25,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:25" (1/1) ... [2020-10-12 16:11:25,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:25" (1/1) ... [2020-10-12 16:11:25,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:25" (1/1) ... [2020-10-12 16:11:25,619 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:25" (1/1) ... [2020-10-12 16:11:25,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:25" (1/1) ... [2020-10-12 16:11:25,635 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:25" (1/1) ... [2020-10-12 16:11:25,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:25" (1/1) ... [2020-10-12 16:11:25,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:11:25,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:11:25,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:11:25,642 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:11:25,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:25" (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 16:11:25,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:11:25,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:11:25,713 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:11:25,713 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:11:25,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:11:25,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-12 16:11:25,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:11:25,715 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:11:25,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:11:25,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:11:25,928 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:11:25,929 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-12 16:11:25,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:11:25 BoogieIcfgContainer [2020-10-12 16:11:25,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:11:25,934 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:11:25,934 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:11:25,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:11:25,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:11:25" (1/3) ... [2020-10-12 16:11:25,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d9d5721 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:11:25, skipping insertion in model container [2020-10-12 16:11:25,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:11:25" (2/3) ... [2020-10-12 16:11:25,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d9d5721 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:11:25, skipping insertion in model container [2020-10-12 16:11:25,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:11:25" (3/3) ... [2020-10-12 16:11:25,941 INFO L109 eAbstractionObserver]: Analyzing ICFG in-de42.c [2020-10-12 16:11:25,955 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:11:25,963 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:11:25,977 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:11:26,000 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:11:26,001 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:11:26,001 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:11:26,001 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:11:26,001 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:11:26,001 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:11:26,002 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:11:26,002 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:11:26,021 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-10-12 16:11:26,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 16:11:26,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:26,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:26,029 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:26,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:26,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1870796656, now seen corresponding path program 1 times [2020-10-12 16:11:26,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:26,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640146006] [2020-10-12 16:11:26,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:26,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:26,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:26,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:26,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:26,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 16:11:26,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:26,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 529 [2020-10-12 16:11:26,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:26,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:11:26,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:26,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:11:26,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:11:26,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:26,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:26,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:26,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:26,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:26,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:26,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:11:26,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:26,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:26,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:26,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:26,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:26,905 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 16:11:26,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640146006] [2020-10-12 16:11:26,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:11:26,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 16:11:26,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116806992] [2020-10-12 16:11:26,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:11:26,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:26,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:11:26,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:11:26,933 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 7 states. [2020-10-12 16:11:27,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:27,095 INFO L93 Difference]: Finished difference Result 57 states and 88 transitions. [2020-10-12 16:11:27,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:11:27,097 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-12 16:11:27,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:27,108 INFO L225 Difference]: With dead ends: 57 [2020-10-12 16:11:27,108 INFO L226 Difference]: Without dead ends: 23 [2020-10-12 16:11:27,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:11:27,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-12 16:11:27,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-10-12 16:11:27,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-12 16:11:27,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2020-10-12 16:11:27,156 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 14 [2020-10-12 16:11:27,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:27,157 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-12 16:11:27,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:11:27,158 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2020-10-12 16:11:27,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 16:11:27,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:27,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:27,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:11:27,160 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:27,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:27,160 INFO L82 PathProgramCache]: Analyzing trace with hash 2081142662, now seen corresponding path program 1 times [2020-10-12 16:11:27,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:27,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971747638] [2020-10-12 16:11:27,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:27,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:27,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:27,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 16:11:27,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:27,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-12 16:11:27,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:27,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:11:27,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:11:27,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 16:11:27,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:27,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:27,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:27,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:27,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:27,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:27,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:27,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:11:27,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:27,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:27,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:27,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:27,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:11:27,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:27,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971747638] [2020-10-12 16:11:27,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:11:27,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 16:11:27,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022735177] [2020-10-12 16:11:27,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 16:11:27,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:27,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 16:11:27,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 16:11:27,251 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand 3 states. [2020-10-12 16:11:27,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:27,285 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2020-10-12 16:11:27,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 16:11:27,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-12 16:11:27,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:27,288 INFO L225 Difference]: With dead ends: 32 [2020-10-12 16:11:27,288 INFO L226 Difference]: Without dead ends: 25 [2020-10-12 16:11:27,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 16:11:27,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-12 16:11:27,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-12 16:11:27,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-12 16:11:27,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2020-10-12 16:11:27,313 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 15 [2020-10-12 16:11:27,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:27,313 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2020-10-12 16:11:27,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 16:11:27,314 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2020-10-12 16:11:27,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 16:11:27,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:27,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:27,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:11:27,315 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:27,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:27,315 INFO L82 PathProgramCache]: Analyzing trace with hash -810996235, now seen corresponding path program 1 times [2020-10-12 16:11:27,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:27,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291327131] [2020-10-12 16:11:27,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:27,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:27,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:27,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:27,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 16:11:27,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:11:27,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-12 16:11:27,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:27,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:11:27,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:11:27,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 16:11:27,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:27,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:27,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:27,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:27,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:27,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:27,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:27,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:27,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:27,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:27,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:27,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:27,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291327131] [2020-10-12 16:11:27,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:11:27,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 16:11:27,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40656733] [2020-10-12 16:11:27,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:11:27,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:27,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:11:27,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:11:27,509 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 4 states. [2020-10-12 16:11:27,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:27,566 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2020-10-12 16:11:27,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:11:27,567 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-12 16:11:27,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:27,568 INFO L225 Difference]: With dead ends: 35 [2020-10-12 16:11:27,568 INFO L226 Difference]: Without dead ends: 25 [2020-10-12 16:11:27,569 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 16:11:27,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-12 16:11:27,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-12 16:11:27,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-12 16:11:27,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2020-10-12 16:11:27,576 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 15 [2020-10-12 16:11:27,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:27,576 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-12 16:11:27,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:11:27,577 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2020-10-12 16:11:27,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 16:11:27,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:27,577 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:27,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:11:27,578 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:27,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:27,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1211614777, now seen corresponding path program 1 times [2020-10-12 16:11:27,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:27,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463485289] [2020-10-12 16:11:27,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:27,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:27,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:27,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:27,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 16:11:27,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:11:27,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-12 16:11:27,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:27,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:11:27,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:27,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 16:11:27,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:27,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:27,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:27,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:27,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:27,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:27,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:27,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:27,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:27,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:27,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:27,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:27,709 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 16:11:27,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463485289] [2020-10-12 16:11:27,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:27,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:11:27,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704778848] [2020-10-12 16:11:27,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:11:27,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:27,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:11:27,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:11:27,712 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand 5 states. [2020-10-12 16:11:27,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:27,776 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2020-10-12 16:11:27,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:11:27,777 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-12 16:11:27,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:27,778 INFO L225 Difference]: With dead ends: 41 [2020-10-12 16:11:27,778 INFO L226 Difference]: Without dead ends: 32 [2020-10-12 16:11:27,779 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 16:11:27,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-12 16:11:27,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-10-12 16:11:27,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 16:11:27,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-10-12 16:11:27,787 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 15 [2020-10-12 16:11:27,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:27,787 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-10-12 16:11:27,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:11:27,788 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-10-12 16:11:27,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:11:27,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:27,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:27,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:11:27,789 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:27,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:27,789 INFO L82 PathProgramCache]: Analyzing trace with hash 162818764, now seen corresponding path program 1 times [2020-10-12 16:11:27,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:27,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827331716] [2020-10-12 16:11:27,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:27,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:27,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:27,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:27,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:11:27,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:11:27,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-12 16:11:27,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:27,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:11:27,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:27,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 16:11:27,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:27,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:27,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:27,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:27,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:27,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:27,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:27,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:27,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:27,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:27,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:27,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:27,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:27,864 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 16:11:27,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827331716] [2020-10-12 16:11:27,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:11:27,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 16:11:27,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470318260] [2020-10-12 16:11:27,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:11:27,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:27,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:11:27,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:11:27,867 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 4 states. [2020-10-12 16:11:27,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:27,910 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-10-12 16:11:27,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:11:27,911 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-12 16:11:27,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:27,912 INFO L225 Difference]: With dead ends: 36 [2020-10-12 16:11:27,912 INFO L226 Difference]: Without dead ends: 25 [2020-10-12 16:11:27,913 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 16:11:27,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-12 16:11:27,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-12 16:11:27,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-12 16:11:27,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-10-12 16:11:27,918 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 16 [2020-10-12 16:11:27,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:27,919 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-10-12 16:11:27,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:11:27,919 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-10-12 16:11:27,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:11:27,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:27,920 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:27,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:11:27,921 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:27,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:27,921 INFO L82 PathProgramCache]: Analyzing trace with hash 2132395212, now seen corresponding path program 2 times [2020-10-12 16:11:27,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:27,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199788] [2020-10-12 16:11:27,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:27,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:27,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:27,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:28,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:28,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:11:28,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:11:28,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-12 16:11:28,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:28,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:11:28,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:28,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:11:28,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:28,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:28,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:28,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:28,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:28,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:28,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:11:28,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:28,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:28,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:28,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:28,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:28,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:28,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199788] [2020-10-12 16:11:28,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:28,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:11:28,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073619039] [2020-10-12 16:11:28,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:11:28,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:28,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:11:28,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:11:28,077 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 6 states. [2020-10-12 16:11:28,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:28,156 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2020-10-12 16:11:28,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:11:28,157 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-12 16:11:28,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:28,158 INFO L225 Difference]: With dead ends: 43 [2020-10-12 16:11:28,158 INFO L226 Difference]: Without dead ends: 34 [2020-10-12 16:11:28,159 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 16:11:28,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-12 16:11:28,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2020-10-12 16:11:28,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 16:11:28,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-10-12 16:11:28,166 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 16 [2020-10-12 16:11:28,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:28,166 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-10-12 16:11:28,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:11:28,167 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-10-12 16:11:28,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 16:11:28,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:28,168 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 16:11:28,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:11:28,168 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:28,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:28,169 INFO L82 PathProgramCache]: Analyzing trace with hash -2144225578, now seen corresponding path program 1 times [2020-10-12 16:11:28,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:28,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683054918] [2020-10-12 16:11:28,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:28,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:28,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:28,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:28,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 16:11:28,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:11:28,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-12 16:11:28,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:28,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:11:28,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:11:28,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:11:28,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:28,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:28,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:28,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:28,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:28,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:28,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:28,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:28,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:28,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:28,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:28,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:28,296 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 16:11:28,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683054918] [2020-10-12 16:11:28,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:28,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-12 16:11:28,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897026019] [2020-10-12 16:11:28,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:11:28,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:28,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:11:28,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:11:28,299 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 4 states. [2020-10-12 16:11:28,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:28,338 INFO L93 Difference]: Finished difference Result 44 states and 57 transitions. [2020-10-12 16:11:28,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:11:28,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-12 16:11:28,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:28,340 INFO L225 Difference]: With dead ends: 44 [2020-10-12 16:11:28,340 INFO L226 Difference]: Without dead ends: 39 [2020-10-12 16:11:28,341 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 16:11:28,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-12 16:11:28,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-10-12 16:11:28,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 16:11:28,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2020-10-12 16:11:28,348 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 17 [2020-10-12 16:11:28,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:28,348 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2020-10-12 16:11:28,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:11:28,348 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2020-10-12 16:11:28,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 16:11:28,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:28,349 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:28,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:11:28,350 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:28,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:28,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1577477529, now seen corresponding path program 3 times [2020-10-12 16:11:28,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:28,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390193383] [2020-10-12 16:11:28,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:28,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:28,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:28,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:28,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 16:11:28,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:11:28,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-12 16:11:28,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:28,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:11:28,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:28,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:11:28,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:28,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:28,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:28,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:28,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:28,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:28,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:28,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:28,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:28,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:28,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:28,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:28,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:28,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390193383] [2020-10-12 16:11:28,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:28,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:11:28,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859518057] [2020-10-12 16:11:28,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:11:28,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:28,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:11:28,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:11:28,549 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand 7 states. [2020-10-12 16:11:28,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:28,674 INFO L93 Difference]: Finished difference Result 65 states and 92 transitions. [2020-10-12 16:11:28,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:11:28,675 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-10-12 16:11:28,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:28,677 INFO L225 Difference]: With dead ends: 65 [2020-10-12 16:11:28,677 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 16:11:28,678 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 16:11:28,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 16:11:28,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2020-10-12 16:11:28,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 16:11:28,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 60 transitions. [2020-10-12 16:11:28,686 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 60 transitions. Word has length 17 [2020-10-12 16:11:28,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:28,686 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 60 transitions. [2020-10-12 16:11:28,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:11:28,687 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 60 transitions. [2020-10-12 16:11:28,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 16:11:28,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:28,688 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 16:11:28,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:11:28,688 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:28,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:28,689 INFO L82 PathProgramCache]: Analyzing trace with hash -2010945700, now seen corresponding path program 1 times [2020-10-12 16:11:28,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:28,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653090926] [2020-10-12 16:11:28,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:28,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:28,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:28,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:28,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:29,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:29,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:11:29,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:11:29,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 722 [2020-10-12 16:11:29,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:29,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:11:29,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:29,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:11:29,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:29,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:29,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:29,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:29,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:29,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:29,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:29,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:29,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:29,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:29,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:29,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:29,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:29,824 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 16:11:29,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653090926] [2020-10-12 16:11:29,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:29,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:11:29,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368826114] [2020-10-12 16:11:29,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:11:29,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:29,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:11:29,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:11:29,832 INFO L87 Difference]: Start difference. First operand 45 states and 60 transitions. Second operand 10 states. [2020-10-12 16:11:30,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:30,116 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2020-10-12 16:11:30,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:11:30,117 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-12 16:11:30,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:30,118 INFO L225 Difference]: With dead ends: 54 [2020-10-12 16:11:30,118 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 16:11:30,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:11:30,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 16:11:30,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-12 16:11:30,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 16:11:30,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2020-10-12 16:11:30,132 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 18 [2020-10-12 16:11:30,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:30,133 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2020-10-12 16:11:30,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:11:30,134 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2020-10-12 16:11:30,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 16:11:30,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:30,137 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 16:11:30,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:11:30,139 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:30,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:30,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1109756806, now seen corresponding path program 2 times [2020-10-12 16:11:30,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:30,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288192983] [2020-10-12 16:11:30,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:30,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:30,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:30,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:30,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:30,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:11:30,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:30,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 418 [2020-10-12 16:11:30,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:30,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:11:30,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 16:11:30,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:11:30,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:30,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:30,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:30,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:30,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:30,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:30,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:30,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:30,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:30,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:30,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:30,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:30,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:30,634 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 16:11:30,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288192983] [2020-10-12 16:11:30,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:30,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:11:30,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502515512] [2020-10-12 16:11:30,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:11:30,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:30,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:11:30,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:11:30,636 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand 6 states. [2020-10-12 16:11:30,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:30,770 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2020-10-12 16:11:30,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:11:30,771 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-12 16:11:30,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:30,772 INFO L225 Difference]: With dead ends: 64 [2020-10-12 16:11:30,772 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 16:11:30,774 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 16:11:30,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 16:11:30,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-12 16:11:30,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-12 16:11:30,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2020-10-12 16:11:30,784 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 18 [2020-10-12 16:11:30,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:30,784 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2020-10-12 16:11:30,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:11:30,784 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2020-10-12 16:11:30,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 16:11:30,787 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:30,788 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:30,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 16:11:30,788 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:30,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:30,789 INFO L82 PathProgramCache]: Analyzing trace with hash -619415508, now seen corresponding path program 4 times [2020-10-12 16:11:30,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:30,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147899230] [2020-10-12 16:11:30,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:30,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:30,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:30,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:30,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:11:30,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:11:30,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-12 16:11:30,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:30,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:11:30,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:30,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:11:30,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:31,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:31,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:31,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:31,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:31,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:31,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:31,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:31,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:31,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:31,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:31,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:31,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:31,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147899230] [2020-10-12 16:11:31,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:31,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:11:31,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926453459] [2020-10-12 16:11:31,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:11:31,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:31,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:11:31,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:11:31,059 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand 8 states. [2020-10-12 16:11:31,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:31,193 INFO L93 Difference]: Finished difference Result 79 states and 106 transitions. [2020-10-12 16:11:31,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:11:31,194 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-10-12 16:11:31,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:31,195 INFO L225 Difference]: With dead ends: 79 [2020-10-12 16:11:31,195 INFO L226 Difference]: Without dead ends: 68 [2020-10-12 16:11:31,196 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 16:11:31,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-12 16:11:31,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-12 16:11:31,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 16:11:31,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2020-10-12 16:11:31,211 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 18 [2020-10-12 16:11:31,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:31,212 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2020-10-12 16:11:31,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:11:31,212 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2020-10-12 16:11:31,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 16:11:31,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:31,214 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 16:11:31,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 16:11:31,215 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:31,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:31,216 INFO L82 PathProgramCache]: Analyzing trace with hash 2120730518, now seen corresponding path program 2 times [2020-10-12 16:11:31,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:31,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938425386] [2020-10-12 16:11:31,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:31,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:31,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:31,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 16:11:31,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:31,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-12 16:11:31,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:31,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:11:31,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:11:31,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:11:31,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:31,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:31,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:31,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:31,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:31,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:31,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:31,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:31,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:31,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:31,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:31,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 16:11:31,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938425386] [2020-10-12 16:11:31,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:31,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-12 16:11:31,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122487304] [2020-10-12 16:11:31,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:11:31,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:31,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:11:31,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:11:31,333 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand 4 states. [2020-10-12 16:11:31,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:31,367 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2020-10-12 16:11:31,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:11:31,368 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-12 16:11:31,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:31,369 INFO L225 Difference]: With dead ends: 65 [2020-10-12 16:11:31,369 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 16:11:31,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 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 16:11:31,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 16:11:31,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-12 16:11:31,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 16:11:31,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2020-10-12 16:11:31,378 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 19 [2020-10-12 16:11:31,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:31,378 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2020-10-12 16:11:31,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:11:31,378 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2020-10-12 16:11:31,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 16:11:31,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:31,379 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:31,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 16:11:31,380 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:31,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:31,380 INFO L82 PathProgramCache]: Analyzing trace with hash -984263929, now seen corresponding path program 5 times [2020-10-12 16:11:31,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:31,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117145860] [2020-10-12 16:11:31,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:31,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:31,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:31,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:31,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 16:11:31,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:11:31,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-12 16:11:31,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:31,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:11:31,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:31,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 16:11:31,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:11:31,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:31,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:31,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:31,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:31,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:31,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:31,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:31,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:31,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:31,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:31,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:31,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:31,726 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:31,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117145860] [2020-10-12 16:11:31,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:31,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:11:31,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772482835] [2020-10-12 16:11:31,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:11:31,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:31,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:11:31,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:11:31,729 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand 9 states. [2020-10-12 16:11:31,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:31,890 INFO L93 Difference]: Finished difference Result 83 states and 114 transitions. [2020-10-12 16:11:31,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:11:31,891 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-10-12 16:11:31,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:31,892 INFO L225 Difference]: With dead ends: 83 [2020-10-12 16:11:31,892 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 16:11:31,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:11:31,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 16:11:31,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-12 16:11:31,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 16:11:31,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2020-10-12 16:11:31,905 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 19 [2020-10-12 16:11:31,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:31,905 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2020-10-12 16:11:31,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:11:31,905 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2020-10-12 16:11:31,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 16:11:31,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:31,906 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 16:11:31,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 16:11:31,907 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:31,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:31,907 INFO L82 PathProgramCache]: Analyzing trace with hash -61628532, now seen corresponding path program 3 times [2020-10-12 16:11:31,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:31,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457385312] [2020-10-12 16:11:31,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:31,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:31,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:32,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:32,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:32,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:32,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:11:32,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:11:32,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 474 [2020-10-12 16:11:32,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:32,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:11:32,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:32,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:11:32,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:32,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:32,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:32,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:32,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:32,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:32,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:32,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:32,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:32,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:32,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:32,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:32,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457385312] [2020-10-12 16:11:32,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:32,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:11:32,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130613616] [2020-10-12 16:11:32,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:11:32,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:32,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:11:32,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:11:32,792 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand 12 states. [2020-10-12 16:11:35,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:35,176 INFO L93 Difference]: Finished difference Result 69 states and 86 transitions. [2020-10-12 16:11:35,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:11:35,177 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-12 16:11:35,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:35,178 INFO L225 Difference]: With dead ends: 69 [2020-10-12 16:11:35,178 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 16:11:35,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:11:35,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 16:11:35,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2020-10-12 16:11:35,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 16:11:35,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2020-10-12 16:11:35,185 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 20 [2020-10-12 16:11:35,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:35,186 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2020-10-12 16:11:35,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:11:35,186 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2020-10-12 16:11:35,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 16:11:35,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:35,187 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 16:11:35,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 16:11:35,187 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:35,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:35,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1324722900, now seen corresponding path program 3 times [2020-10-12 16:11:35,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:35,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340632099] [2020-10-12 16:11:35,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:35,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:35,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:35,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:35,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:35,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:11:35,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:11:35,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-12 16:11:35,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:35,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:11:35,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:11:35,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:11:35,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:35,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:35,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:35,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:35,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:35,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:35,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:35,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:35,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:35,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:35,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:35,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:35,388 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 16:11:35,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340632099] [2020-10-12 16:11:35,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:35,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:11:35,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813747851] [2020-10-12 16:11:35,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:11:35,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:35,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:11:35,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:11:35,390 INFO L87 Difference]: Start difference. First operand 58 states and 75 transitions. Second operand 5 states. [2020-10-12 16:11:35,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:35,620 INFO L93 Difference]: Finished difference Result 80 states and 105 transitions. [2020-10-12 16:11:35,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:11:35,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-12 16:11:35,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:35,623 INFO L225 Difference]: With dead ends: 80 [2020-10-12 16:11:35,623 INFO L226 Difference]: Without dead ends: 75 [2020-10-12 16:11:35,624 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 16:11:35,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-12 16:11:35,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-10-12 16:11:35,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 16:11:35,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 96 transitions. [2020-10-12 16:11:35,632 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 96 transitions. Word has length 20 [2020-10-12 16:11:35,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:35,633 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 96 transitions. [2020-10-12 16:11:35,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:11:35,633 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 96 transitions. [2020-10-12 16:11:35,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 16:11:35,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:35,634 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:35,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 16:11:35,634 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:35,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:35,635 INFO L82 PathProgramCache]: Analyzing trace with hash 590336908, now seen corresponding path program 6 times [2020-10-12 16:11:35,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:35,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187310771] [2020-10-12 16:11:35,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:35,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:35,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:35,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:35,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:11:35,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:11:35,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-12 16:11:35,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:35,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:11:35,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:35,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:11:35,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:35,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:35,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:35,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:35,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:35,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:35,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:35,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:35,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:35,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:35,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:35,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:35,991 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:35,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187310771] [2020-10-12 16:11:35,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:35,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:11:35,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144536044] [2020-10-12 16:11:35,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:11:35,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:35,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:11:35,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:11:35,994 INFO L87 Difference]: Start difference. First operand 73 states and 96 transitions. Second operand 10 states. [2020-10-12 16:11:36,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:36,221 INFO L93 Difference]: Finished difference Result 118 states and 166 transitions. [2020-10-12 16:11:36,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:11:36,222 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-12 16:11:36,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:36,224 INFO L225 Difference]: With dead ends: 118 [2020-10-12 16:11:36,224 INFO L226 Difference]: Without dead ends: 105 [2020-10-12 16:11:36,225 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 16:11:36,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-12 16:11:36,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 82. [2020-10-12 16:11:36,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-12 16:11:36,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 109 transitions. [2020-10-12 16:11:36,234 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 109 transitions. Word has length 20 [2020-10-12 16:11:36,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:36,234 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 109 transitions. [2020-10-12 16:11:36,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:11:36,235 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 109 transitions. [2020-10-12 16:11:36,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:11:36,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:36,235 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 16:11:36,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 16:11:36,236 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:36,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:36,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1918800838, now seen corresponding path program 4 times [2020-10-12 16:11:36,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:36,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243977050] [2020-10-12 16:11:36,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:36,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:36,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 16:11:36,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:11:36,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-12 16:11:36,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:36,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:11:36,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:11:36,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:11:36,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:36,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:36,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:36,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:36,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:36,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:36,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:36,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:36,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:36,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:36,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:36,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:36,469 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 16:11:36,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243977050] [2020-10-12 16:11:36,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:36,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:11:36,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052074249] [2020-10-12 16:11:36,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:11:36,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:36,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:11:36,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:11:36,471 INFO L87 Difference]: Start difference. First operand 82 states and 109 transitions. Second operand 5 states. [2020-10-12 16:11:36,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:36,582 INFO L93 Difference]: Finished difference Result 90 states and 118 transitions. [2020-10-12 16:11:36,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:11:36,583 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-12 16:11:36,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:36,584 INFO L225 Difference]: With dead ends: 90 [2020-10-12 16:11:36,584 INFO L226 Difference]: Without dead ends: 85 [2020-10-12 16:11:36,585 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 16:11:36,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-12 16:11:36,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2020-10-12 16:11:36,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 16:11:36,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 110 transitions. [2020-10-12 16:11:36,594 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 110 transitions. Word has length 21 [2020-10-12 16:11:36,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:36,594 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 110 transitions. [2020-10-12 16:11:36,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:11:36,595 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 110 transitions. [2020-10-12 16:11:36,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:11:36,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:36,595 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 16:11:36,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 16:11:36,596 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:36,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:36,596 INFO L82 PathProgramCache]: Analyzing trace with hash 655706470, now seen corresponding path program 4 times [2020-10-12 16:11:36,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:36,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118006128] [2020-10-12 16:11:36,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:36,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:36,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:37,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:37,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 16:11:37,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:11:37,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 779 [2020-10-12 16:11:37,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:37,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:11:37,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:37,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:11:37,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:11:37,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:37,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:37,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:37,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:37,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:37,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:37,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:37,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:37,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:37,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:37,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:37,520 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 16:11:37,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118006128] [2020-10-12 16:11:37,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:37,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:11:37,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939484861] [2020-10-12 16:11:37,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:11:37,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:37,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:11:37,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:11:37,522 INFO L87 Difference]: Start difference. First operand 83 states and 110 transitions. Second operand 8 states. [2020-10-12 16:11:37,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:37,736 INFO L93 Difference]: Finished difference Result 99 states and 127 transitions. [2020-10-12 16:11:37,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:11:37,737 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-12 16:11:37,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:37,738 INFO L225 Difference]: With dead ends: 99 [2020-10-12 16:11:37,738 INFO L226 Difference]: Without dead ends: 89 [2020-10-12 16:11:37,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:11:37,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-12 16:11:37,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2020-10-12 16:11:37,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-12 16:11:37,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 107 transitions. [2020-10-12 16:11:37,749 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 107 transitions. Word has length 21 [2020-10-12 16:11:37,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:37,749 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 107 transitions. [2020-10-12 16:11:37,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:11:37,749 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 107 transitions. [2020-10-12 16:11:37,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 16:11:37,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:37,750 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:37,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 16:11:37,750 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:37,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:37,751 INFO L82 PathProgramCache]: Analyzing trace with hash -2136644697, now seen corresponding path program 7 times [2020-10-12 16:11:37,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:37,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899779651] [2020-10-12 16:11:37,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:37,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:37,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:37,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:38,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:38,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 16:11:38,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:11:38,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 318 [2020-10-12 16:11:38,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:38,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:11:38,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:38,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:11:38,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:38,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:38,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:38,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:38,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:38,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:38,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:38,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:38,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:38,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:38,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:38,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:38,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899779651] [2020-10-12 16:11:38,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:38,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:11:38,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726454959] [2020-10-12 16:11:38,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:11:38,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:38,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:11:38,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:11:38,246 INFO L87 Difference]: Start difference. First operand 82 states and 107 transitions. Second operand 11 states. [2020-10-12 16:11:38,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:38,525 INFO L93 Difference]: Finished difference Result 132 states and 185 transitions. [2020-10-12 16:11:38,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:11:38,525 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-10-12 16:11:38,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:38,526 INFO L225 Difference]: With dead ends: 132 [2020-10-12 16:11:38,526 INFO L226 Difference]: Without dead ends: 118 [2020-10-12 16:11:38,527 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 16:11:38,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-12 16:11:38,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 91. [2020-10-12 16:11:38,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-12 16:11:38,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 120 transitions. [2020-10-12 16:11:38,539 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 120 transitions. Word has length 21 [2020-10-12 16:11:38,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:38,539 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 120 transitions. [2020-10-12 16:11:38,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:11:38,540 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 120 transitions. [2020-10-12 16:11:38,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:11:38,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:38,542 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 16:11:38,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 16:11:38,542 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:38,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:38,543 INFO L82 PathProgramCache]: Analyzing trace with hash -611178388, now seen corresponding path program 5 times [2020-10-12 16:11:38,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:38,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738417162] [2020-10-12 16:11:38,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:38,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:38,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:38,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:39,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:39,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:39,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:11:39,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:11:39,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 821 [2020-10-12 16:11:39,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:39,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:11:39,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:39,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:11:39,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:40,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:40,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:40,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:40,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:40,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:40,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:40,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:40,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:40,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:40,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:40,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:40,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738417162] [2020-10-12 16:11:40,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:40,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:11:40,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134451218] [2020-10-12 16:11:40,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:11:40,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:40,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:11:40,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:11:40,321 INFO L87 Difference]: Start difference. First operand 91 states and 120 transitions. Second operand 13 states. [2020-10-12 16:11:41,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:41,041 INFO L93 Difference]: Finished difference Result 102 states and 131 transitions. [2020-10-12 16:11:41,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:11:41,041 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-10-12 16:11:41,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:41,042 INFO L225 Difference]: With dead ends: 102 [2020-10-12 16:11:41,043 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 16:11:41,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:11:41,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 16:11:41,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2020-10-12 16:11:41,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-12 16:11:41,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 124 transitions. [2020-10-12 16:11:41,056 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 124 transitions. Word has length 22 [2020-10-12 16:11:41,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:41,057 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 124 transitions. [2020-10-12 16:11:41,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:11:41,057 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 124 transitions. [2020-10-12 16:11:41,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:11:41,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:41,060 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 16:11:41,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 16:11:41,060 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:41,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:41,061 INFO L82 PathProgramCache]: Analyzing trace with hash 25976860, now seen corresponding path program 6 times [2020-10-12 16:11:41,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:41,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982539679] [2020-10-12 16:11:41,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:41,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:41,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:41,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:41,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:41,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:41,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:41,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:11:41,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:11:41,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 674 [2020-10-12 16:11:41,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:41,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:11:41,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:41,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:11:41,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:46,168 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-12 16:11:54,472 WARN L193 SmtUtils]: Spent 6.23 s on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-10-12 16:11:58,720 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-10-12 16:12:17,303 WARN L193 SmtUtils]: Spent 12.37 s on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-10-12 16:12:21,783 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2020-10-12 16:12:26,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:26,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:26,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:26,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:26,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:26,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:26,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:12:26,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:26,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:26,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:26,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:26,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:26,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982539679] [2020-10-12 16:12:26,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:26,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:12:26,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015518802] [2020-10-12 16:12:26,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:12:26,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:26,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:12:26,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=170, Unknown=8, NotChecked=0, Total=210 [2020-10-12 16:12:26,306 INFO L87 Difference]: Start difference. First operand 95 states and 124 transitions. Second operand 15 states. [2020-10-12 16:12:38,985 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 2)) (.cse3 (* c_main_~n~0 (- 2))) (.cse1 (* c_main_~y~0 (- 1))) (.cse2 (* c_main_~n~0 2))) (and (<= c_main_~y~0 3) (<= c_main_~x~0 (+ (* 4294967296 (div (+ .cse0 c_main_~y~0 (* (div (+ .cse1 .cse2 (- 3)) 4294967296) 4294967296) .cse3 3) 8589934592)) 4294967294)) (<= c_main_~z~0 3) (<= 3 c_main_~y~0) (<= c_main_~x~0 (+ (* 4294967296 (div (+ .cse0 c_main_~z~0 .cse3 (* (div (+ (* c_main_~z~0 (- 1)) .cse2 (- 3)) 4294967296) 4294967296) 3) 8589934592)) 4294967294)) (<= c_main_~x~0 (+ (* 4294967296 (div (+ c_main_~x~0 .cse1 c_main_~z~0 (* c_main_~n~0 (- 1)) (* (div .cse2 4294967296) 2147483648) 3) 4294967296)) 4294967294)))) is different from false [2020-10-12 16:12:50,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:50,593 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2020-10-12 16:12:50,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:12:50,595 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2020-10-12 16:12:50,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:50,596 INFO L225 Difference]: With dead ends: 106 [2020-10-12 16:12:50,596 INFO L226 Difference]: Without dead ends: 95 [2020-10-12 16:12:50,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 46.5s TimeCoverageRelationStatistics Valid=38, Invalid=197, Unknown=9, NotChecked=28, Total=272 [2020-10-12 16:12:50,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-12 16:12:50,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-12 16:12:50,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-12 16:12:50,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 123 transitions. [2020-10-12 16:12:50,608 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 123 transitions. Word has length 22 [2020-10-12 16:12:50,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:50,608 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 123 transitions. [2020-10-12 16:12:50,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:12:50,608 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 123 transitions. [2020-10-12 16:12:50,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:12:50,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:50,610 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:50,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 16:12:50,610 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:50,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:50,611 INFO L82 PathProgramCache]: Analyzing trace with hash -773728532, now seen corresponding path program 8 times [2020-10-12 16:12:50,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:50,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903894362] [2020-10-12 16:12:50,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:50,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:50,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:50,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:50,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:12:50,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:12:50,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 280 [2020-10-12 16:12:50,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:50,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:12:50,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:50,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:12:50,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:51,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:51,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:51,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:51,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:51,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:51,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:12:51,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:51,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:51,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:51,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:51,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:51,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903894362] [2020-10-12 16:12:51,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:51,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:12:51,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471706277] [2020-10-12 16:12:51,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:12:51,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:51,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:12:51,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:12:51,096 INFO L87 Difference]: Start difference. First operand 95 states and 123 transitions. Second operand 12 states. [2020-10-12 16:12:51,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:51,439 INFO L93 Difference]: Finished difference Result 148 states and 207 transitions. [2020-10-12 16:12:51,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:12:51,442 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-10-12 16:12:51,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:51,443 INFO L225 Difference]: With dead ends: 148 [2020-10-12 16:12:51,443 INFO L226 Difference]: Without dead ends: 134 [2020-10-12 16:12:51,444 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 16:12:51,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-12 16:12:51,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 104. [2020-10-12 16:12:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-12 16:12:51,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 136 transitions. [2020-10-12 16:12:51,459 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 136 transitions. Word has length 22 [2020-10-12 16:12:51,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:51,459 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 136 transitions. [2020-10-12 16:12:51,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:12:51,459 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 136 transitions. [2020-10-12 16:12:51,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 16:12:51,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:51,460 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:51,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 16:12:51,460 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:51,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:51,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1731123066, now seen corresponding path program 7 times [2020-10-12 16:12:51,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:51,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940556898] [2020-10-12 16:12:51,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:51,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:51,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:51,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:51,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 16:12:51,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:51,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-12 16:12:51,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:51,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:12:51,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 16:12:51,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:12:51,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:51,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:51,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:51,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:51,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:51,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:51,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:51,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:51,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:51,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:51,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:51,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 16:12:51,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940556898] [2020-10-12 16:12:51,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:51,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:12:51,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25703609] [2020-10-12 16:12:51,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:12:51,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:51,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:12:51,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:12:51,608 INFO L87 Difference]: Start difference. First operand 104 states and 136 transitions. Second operand 5 states. [2020-10-12 16:12:51,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:51,667 INFO L93 Difference]: Finished difference Result 113 states and 146 transitions. [2020-10-12 16:12:51,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:12:51,667 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-12 16:12:51,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:51,668 INFO L225 Difference]: With dead ends: 113 [2020-10-12 16:12:51,668 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 16:12:51,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:12:51,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 16:12:51,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2020-10-12 16:12:51,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-12 16:12:51,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 126 transitions. [2020-10-12 16:12:51,681 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 126 transitions. Word has length 23 [2020-10-12 16:12:51,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:51,681 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 126 transitions. [2020-10-12 16:12:51,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:12:51,682 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 126 transitions. [2020-10-12 16:12:51,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 16:12:51,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:51,683 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 16:12:51,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 16:12:51,684 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:51,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:51,684 INFO L82 PathProgramCache]: Analyzing trace with hash -408841578, now seen corresponding path program 5 times [2020-10-12 16:12:51,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:51,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452627458] [2020-10-12 16:12:51,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:51,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:51,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:51,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:51,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 16:12:51,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:12:51,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-12 16:12:51,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:51,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:12:51,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:12:51,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:12:51,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:51,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:51,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:51,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:51,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:51,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:51,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:12:51,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:51,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:51,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:51,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:51,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:51,949 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 16:12:51,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452627458] [2020-10-12 16:12:51,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:51,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:12:51,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769754812] [2020-10-12 16:12:51,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:12:51,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:51,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:12:51,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:12:51,951 INFO L87 Difference]: Start difference. First operand 95 states and 126 transitions. Second operand 6 states. [2020-10-12 16:12:52,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:52,274 INFO L93 Difference]: Finished difference Result 124 states and 166 transitions. [2020-10-12 16:12:52,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:12:52,277 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-12 16:12:52,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:52,278 INFO L225 Difference]: With dead ends: 124 [2020-10-12 16:12:52,278 INFO L226 Difference]: Without dead ends: 119 [2020-10-12 16:12:52,279 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 16:12:52,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-12 16:12:52,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2020-10-12 16:12:52,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-12 16:12:52,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 154 transitions. [2020-10-12 16:12:52,295 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 154 transitions. Word has length 23 [2020-10-12 16:12:52,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:52,295 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 154 transitions. [2020-10-12 16:12:52,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:12:52,295 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 154 transitions. [2020-10-12 16:12:52,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-12 16:12:52,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:52,297 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:52,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 16:12:52,297 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:52,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:52,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1473000377, now seen corresponding path program 9 times [2020-10-12 16:12:52,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:52,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [409939686] [2020-10-12 16:12:52,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:52,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:52,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:52,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:52,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 16:12:52,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:12:52,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-12 16:12:52,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:52,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:12:52,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:52,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:12:52,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:52,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:52,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:52,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:52,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:52,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:52,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:52,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:52,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:52,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:52,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:52,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:52,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [409939686] [2020-10-12 16:12:52,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:52,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:12:52,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787706821] [2020-10-12 16:12:52,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:12:52,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:52,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:12:52,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:12:52,808 INFO L87 Difference]: Start difference. First operand 115 states and 154 transitions. Second operand 13 states. [2020-10-12 16:12:53,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:53,208 INFO L93 Difference]: Finished difference Result 183 states and 266 transitions. [2020-10-12 16:12:53,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:12:53,209 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2020-10-12 16:12:53,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:53,210 INFO L225 Difference]: With dead ends: 183 [2020-10-12 16:12:53,210 INFO L226 Difference]: Without dead ends: 168 [2020-10-12 16:12:53,211 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 16:12:53,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-12 16:12:53,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 126. [2020-10-12 16:12:53,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-12 16:12:53,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 170 transitions. [2020-10-12 16:12:53,232 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 170 transitions. Word has length 23 [2020-10-12 16:12:53,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:53,232 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 170 transitions. [2020-10-12 16:12:53,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:12:53,233 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 170 transitions. [2020-10-12 16:12:53,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:12:53,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:53,234 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 16:12:53,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 16:12:53,234 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:53,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:53,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1859614010, now seen corresponding path program 8 times [2020-10-12 16:12:53,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:53,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940376567] [2020-10-12 16:12:53,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:53,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:53,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:53,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:53,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:54,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:54,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:12:54,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:12:54,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1363 [2020-10-12 16:12:54,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:54,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:12:54,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:54,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:12:54,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:12:55,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:55,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:55,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:55,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:55,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:55,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:12:55,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:55,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:55,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:55,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:55,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:55,202 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 16:12:55,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940376567] [2020-10-12 16:12:55,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:55,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:12:55,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144210119] [2020-10-12 16:12:55,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:12:55,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:55,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:12:55,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:12:55,204 INFO L87 Difference]: Start difference. First operand 126 states and 170 transitions. Second operand 15 states. [2020-10-12 16:12:57,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:57,716 INFO L93 Difference]: Finished difference Result 140 states and 183 transitions. [2020-10-12 16:12:57,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:12:57,717 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-10-12 16:12:57,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:57,718 INFO L225 Difference]: With dead ends: 140 [2020-10-12 16:12:57,718 INFO L226 Difference]: Without dead ends: 128 [2020-10-12 16:12:57,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:12:57,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-12 16:12:57,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2020-10-12 16:12:57,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-12 16:12:57,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 169 transitions. [2020-10-12 16:12:57,732 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 169 transitions. Word has length 24 [2020-10-12 16:12:57,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:57,732 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 169 transitions. [2020-10-12 16:12:57,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:12:57,733 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 169 transitions. [2020-10-12 16:12:57,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:12:57,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:57,734 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 16:12:57,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 16:12:57,734 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:57,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:57,735 INFO L82 PathProgramCache]: Analyzing trace with hash 246350748, now seen corresponding path program 9 times [2020-10-12 16:12:57,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:57,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662343516] [2020-10-12 16:12:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:57,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:57,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:58,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:58,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:12:58,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:12:58,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-10-12 16:12:58,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:58,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:12:58,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:12:58,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:12:58,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:58,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:58,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:58,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:58,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:58,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:58,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:58,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:58,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:58,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:58,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:58,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:58,091 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 16:12:58,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662343516] [2020-10-12 16:12:58,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:58,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:12:58,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447554201] [2020-10-12 16:12:58,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:12:58,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:58,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:12:58,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:12:58,092 INFO L87 Difference]: Start difference. First operand 126 states and 169 transitions. Second operand 6 states. [2020-10-12 16:12:58,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:58,300 INFO L93 Difference]: Finished difference Result 135 states and 180 transitions. [2020-10-12 16:12:58,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:12:58,302 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-12 16:12:58,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:58,303 INFO L225 Difference]: With dead ends: 135 [2020-10-12 16:12:58,303 INFO L226 Difference]: Without dead ends: 130 [2020-10-12 16:12:58,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:12:58,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-12 16:12:58,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2020-10-12 16:12:58,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-12 16:12:58,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 170 transitions. [2020-10-12 16:12:58,317 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 170 transitions. Word has length 24 [2020-10-12 16:12:58,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:58,318 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 170 transitions. [2020-10-12 16:12:58,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:12:58,319 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 170 transitions. [2020-10-12 16:12:58,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:12:58,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:58,319 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 16:12:58,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 16:12:58,320 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:58,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:58,320 INFO L82 PathProgramCache]: Analyzing trace with hash 609951994, now seen corresponding path program 6 times [2020-10-12 16:12:58,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:58,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495535982] [2020-10-12 16:12:58,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:58,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:58,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:58,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:59,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:59,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:12:59,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:12:59,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1406 [2020-10-12 16:12:59,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:59,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:12:59,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:59,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:12:59,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:12:59,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:59,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:59,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:59,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:59,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:59,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:12:59,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:59,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:59,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:59,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:59,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 16:12:59,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495535982] [2020-10-12 16:12:59,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:59,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:12:59,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736036792] [2020-10-12 16:12:59,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:12:59,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:59,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:12:59,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:12:59,947 INFO L87 Difference]: Start difference. First operand 127 states and 170 transitions. Second operand 10 states. [2020-10-12 16:13:00,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:00,180 INFO L93 Difference]: Finished difference Result 145 states and 189 transitions. [2020-10-12 16:13:00,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:13:00,181 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-12 16:13:00,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:00,183 INFO L225 Difference]: With dead ends: 145 [2020-10-12 16:13:00,183 INFO L226 Difference]: Without dead ends: 134 [2020-10-12 16:13:00,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:13:00,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-12 16:13:00,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 126. [2020-10-12 16:13:00,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-12 16:13:00,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 167 transitions. [2020-10-12 16:13:00,197 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 167 transitions. Word has length 24 [2020-10-12 16:13:00,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:00,197 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 167 transitions. [2020-10-12 16:13:00,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:13:00,197 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 167 transitions. [2020-10-12 16:13:00,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:13:00,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:00,198 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 16:13:00,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 16:13:00,198 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:00,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:00,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1176237132, now seen corresponding path program 10 times [2020-10-12 16:13:00,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:00,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316311953] [2020-10-12 16:13:00,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:00,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:00,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:01,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:01,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:13:01,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:13:01,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1327 [2020-10-12 16:13:01,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:01,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:13:01,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:01,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:13:01,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:13:02,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:02,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:02,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:02,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:02,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:02,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:02,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:02,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:02,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:02,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:02,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:13:02,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316311953] [2020-10-12 16:13:02,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:02,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:13:02,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498429569] [2020-10-12 16:13:02,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:13:02,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:02,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:13:02,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:13:02,903 INFO L87 Difference]: Start difference. First operand 126 states and 167 transitions. Second operand 17 states. [2020-10-12 16:13:05,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:05,724 INFO L93 Difference]: Finished difference Result 138 states and 178 transitions. [2020-10-12 16:13:05,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:13:05,725 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2020-10-12 16:13:05,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:05,726 INFO L225 Difference]: With dead ends: 138 [2020-10-12 16:13:05,726 INFO L226 Difference]: Without dead ends: 126 [2020-10-12 16:13:05,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:13:05,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-12 16:13:05,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-10-12 16:13:05,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-12 16:13:05,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 166 transitions. [2020-10-12 16:13:05,740 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 166 transitions. Word has length 24 [2020-10-12 16:13:05,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:05,741 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 166 transitions. [2020-10-12 16:13:05,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:13:05,741 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 166 transitions. [2020-10-12 16:13:05,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:13:05,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:05,742 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:05,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 16:13:05,742 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:05,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:05,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1675591092, now seen corresponding path program 10 times [2020-10-12 16:13:05,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:05,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227093357] [2020-10-12 16:13:05,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:05,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:05,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:06,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:06,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:13:06,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:13:06,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-12 16:13:06,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:06,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:13:06,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:06,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:13:06,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:06,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:06,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:06,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:06,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:06,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:06,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:06,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:13:06,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:06,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:06,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:06,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:06,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:13:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:13:06,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227093357] [2020-10-12 16:13:06,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:06,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:13:06,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258120378] [2020-10-12 16:13:06,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:13:06,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:06,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:13:06,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:13:06,404 INFO L87 Difference]: Start difference. First operand 126 states and 166 transitions. Second operand 14 states. [2020-10-12 16:13:06,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:06,857 INFO L93 Difference]: Finished difference Result 200 states and 288 transitions. [2020-10-12 16:13:06,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:13:06,858 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 24 [2020-10-12 16:13:06,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:06,859 INFO L225 Difference]: With dead ends: 200 [2020-10-12 16:13:06,859 INFO L226 Difference]: Without dead ends: 184 [2020-10-12 16:13:06,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:13:06,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-12 16:13:06,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 137. [2020-10-12 16:13:06,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-12 16:13:06,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 182 transitions. [2020-10-12 16:13:06,874 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 182 transitions. Word has length 24 [2020-10-12 16:13:06,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:06,874 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 182 transitions. [2020-10-12 16:13:06,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:13:06,874 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 182 transitions. [2020-10-12 16:13:06,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:13:06,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:06,875 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 16:13:06,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 16:13:06,875 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:06,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:06,876 INFO L82 PathProgramCache]: Analyzing trace with hash -917523626, now seen corresponding path program 11 times [2020-10-12 16:13:06,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:06,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068501360] [2020-10-12 16:13:06,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:06,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:06,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:06,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:07,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:07,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:13:07,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:13:07,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-10-12 16:13:07,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:07,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:13:07,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 16:13:07,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:13:07,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:07,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:07,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:07,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:07,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:07,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:07,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:07,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:07,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:07,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:07,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:07,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:07,135 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 16:13:07,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068501360] [2020-10-12 16:13:07,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:07,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:13:07,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19152370] [2020-10-12 16:13:07,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:13:07,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:07,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:13:07,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:13:07,137 INFO L87 Difference]: Start difference. First operand 137 states and 182 transitions. Second operand 6 states. [2020-10-12 16:13:09,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:09,348 INFO L93 Difference]: Finished difference Result 147 states and 193 transitions. [2020-10-12 16:13:09,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:13:09,350 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-12 16:13:09,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:09,351 INFO L225 Difference]: With dead ends: 147 [2020-10-12 16:13:09,351 INFO L226 Difference]: Without dead ends: 142 [2020-10-12 16:13:09,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:13:09,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-12 16:13:09,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-10-12 16:13:09,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-12 16:13:09,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 183 transitions. [2020-10-12 16:13:09,370 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 183 transitions. Word has length 25 [2020-10-12 16:13:09,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:09,370 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 183 transitions. [2020-10-12 16:13:09,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:13:09,371 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 183 transitions. [2020-10-12 16:13:09,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 16:13:09,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:09,371 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:09,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 16:13:09,372 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:09,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:09,372 INFO L82 PathProgramCache]: Analyzing trace with hash 634031335, now seen corresponding path program 11 times [2020-10-12 16:13:09,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:09,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028181186] [2020-10-12 16:13:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:09,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:09,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:09,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:09,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 16:13:09,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:13:09,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 595 [2020-10-12 16:13:09,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:09,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:13:09,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:09,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:13:09,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:10,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:10,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:10,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:10,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:10,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:10,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:13:10,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:10,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:10,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:10,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:10,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:10,217 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 16:13:10,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028181186] [2020-10-12 16:13:10,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:10,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:13:10,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156983420] [2020-10-12 16:13:10,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:13:10,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:10,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:13:10,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:13:10,219 INFO L87 Difference]: Start difference. First operand 138 states and 183 transitions. Second operand 15 states. [2020-10-12 16:13:10,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:10,759 INFO L93 Difference]: Finished difference Result 218 states and 315 transitions. [2020-10-12 16:13:10,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:13:10,762 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2020-10-12 16:13:10,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:10,763 INFO L225 Difference]: With dead ends: 218 [2020-10-12 16:13:10,764 INFO L226 Difference]: Without dead ends: 201 [2020-10-12 16:13:10,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:13:10,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-12 16:13:10,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 149. [2020-10-12 16:13:10,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-12 16:13:10,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 199 transitions. [2020-10-12 16:13:10,783 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 199 transitions. Word has length 25 [2020-10-12 16:13:10,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:10,783 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 199 transitions. [2020-10-12 16:13:10,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:13:10,784 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 199 transitions. [2020-10-12 16:13:10,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:13:10,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:10,784 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 16:13:10,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 16:13:10,785 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:10,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:10,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1657076444, now seen corresponding path program 12 times [2020-10-12 16:13:10,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:10,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402195010] [2020-10-12 16:13:10,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:10,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:10,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:11,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:11,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:11,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:11,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:13:11,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:13:11,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 689 [2020-10-12 16:13:11,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:11,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:13:11,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:11,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:13:11,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:16,184 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-12 16:13:18,383 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2020-10-12 16:13:28,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:28,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:28,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:28,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:28,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:28,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:28,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:28,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:28,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:28,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:28,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:28,733 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 16:13:28,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402195010] [2020-10-12 16:13:28,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:28,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:13:28,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513043406] [2020-10-12 16:13:28,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:13:28,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:28,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:13:28,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=300, Unknown=5, NotChecked=0, Total=342 [2020-10-12 16:13:28,735 INFO L87 Difference]: Start difference. First operand 149 states and 199 transitions. Second operand 19 states. [2020-10-12 16:13:33,616 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 19 [2020-10-12 16:13:42,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:42,172 INFO L93 Difference]: Finished difference Result 162 states and 212 transitions. [2020-10-12 16:13:42,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:13:42,173 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2020-10-12 16:13:42,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:42,174 INFO L225 Difference]: With dead ends: 162 [2020-10-12 16:13:42,174 INFO L226 Difference]: Without dead ends: 157 [2020-10-12 16:13:42,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=49, Invalid=408, Unknown=5, NotChecked=0, Total=462 [2020-10-12 16:13:42,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-12 16:13:42,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2020-10-12 16:13:42,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-12 16:13:42,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 204 transitions. [2020-10-12 16:13:42,199 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 204 transitions. Word has length 26 [2020-10-12 16:13:42,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:42,200 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 204 transitions. [2020-10-12 16:13:42,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:13:42,200 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 204 transitions. [2020-10-12 16:13:42,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:13:42,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:42,201 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 16:13:42,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 16:13:42,201 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:42,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:42,202 INFO L82 PathProgramCache]: Analyzing trace with hash -68791060, now seen corresponding path program 13 times [2020-10-12 16:13:42,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:42,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220663264] [2020-10-12 16:13:42,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:42,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:42,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:42,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:42,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:43,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:43,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:13:43,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:13:43,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1605 [2020-10-12 16:13:43,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:43,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:13:43,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:43,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:13:43,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:44,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:44,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:44,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:44,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:44,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:44,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:13:44,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:44,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:44,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:44,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:44,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:13:44,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220663264] [2020-10-12 16:13:44,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:44,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:13:44,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456787812] [2020-10-12 16:13:44,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:13:44,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:44,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:13:44,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:13:44,408 INFO L87 Difference]: Start difference. First operand 154 states and 204 transitions. Second operand 18 states. [2020-10-12 16:13:51,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:51,482 INFO L93 Difference]: Finished difference Result 191 states and 244 transitions. [2020-10-12 16:13:51,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:13:51,483 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-12 16:13:51,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:51,484 INFO L225 Difference]: With dead ends: 191 [2020-10-12 16:13:51,484 INFO L226 Difference]: Without dead ends: 161 [2020-10-12 16:13:51,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:13:51,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-12 16:13:51,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 156. [2020-10-12 16:13:51,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-12 16:13:51,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 205 transitions. [2020-10-12 16:13:51,515 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 205 transitions. Word has length 26 [2020-10-12 16:13:51,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:51,516 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 205 transitions. [2020-10-12 16:13:51,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:13:51,516 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 205 transitions. [2020-10-12 16:13:51,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:13:51,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:51,518 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 16:13:51,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 16:13:51,518 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:51,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:51,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1750860012, now seen corresponding path program 7 times [2020-10-12 16:13:51,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:51,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552189929] [2020-10-12 16:13:51,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:51,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:51,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:51,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:51,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:13:51,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:13:51,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 256 [2020-10-12 16:13:51,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:51,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:13:51,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:13:51,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:13:51,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:51,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:51,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:51,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:51,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:51,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:51,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:51,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:51,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:51,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:51,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:51,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:51,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:51,871 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 16:13:51,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552189929] [2020-10-12 16:13:51,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:51,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:13:51,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847704829] [2020-10-12 16:13:51,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:13:51,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:51,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:13:51,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:13:51,873 INFO L87 Difference]: Start difference. First operand 156 states and 205 transitions. Second operand 7 states. [2020-10-12 16:13:54,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:54,340 INFO L93 Difference]: Finished difference Result 192 states and 253 transitions. [2020-10-12 16:13:54,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:13:54,341 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-12 16:13:54,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:54,342 INFO L225 Difference]: With dead ends: 192 [2020-10-12 16:13:54,343 INFO L226 Difference]: Without dead ends: 187 [2020-10-12 16:13:54,343 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 16:13:54,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-12 16:13:54,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 179. [2020-10-12 16:13:54,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-12 16:13:54,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 237 transitions. [2020-10-12 16:13:54,358 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 237 transitions. Word has length 26 [2020-10-12 16:13:54,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:54,359 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 237 transitions. [2020-10-12 16:13:54,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:13:54,359 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 237 transitions. [2020-10-12 16:13:54,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:13:54,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:54,360 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 16:13:54,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 16:13:54,360 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:54,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:54,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1261009116, now seen corresponding path program 14 times [2020-10-12 16:13:54,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:54,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773958682] [2020-10-12 16:13:54,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:54,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:54,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:54,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:54,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:55,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:55,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:13:55,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:13:55,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1345 [2020-10-12 16:13:55,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:55,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:13:55,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:55,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:13:55,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:05,076 WARN L193 SmtUtils]: Spent 6.35 s on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-10-12 16:14:09,394 WARN L193 SmtUtils]: Spent 4.25 s on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-10-12 16:14:09,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:09,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:09,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:09,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:09,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:09,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:09,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:09,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:09,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:09,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:09,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:09,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773958682] [2020-10-12 16:14:09,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:09,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:14:09,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619999680] [2020-10-12 16:14:09,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:14:09,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:09,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:14:09,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=271, Unknown=1, NotChecked=0, Total=306 [2020-10-12 16:14:09,634 INFO L87 Difference]: Start difference. First operand 179 states and 237 transitions. Second operand 18 states. [2020-10-12 16:14:17,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:17,029 INFO L93 Difference]: Finished difference Result 196 states and 253 transitions. [2020-10-12 16:14:17,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:14:17,030 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 26 [2020-10-12 16:14:17,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:17,032 INFO L225 Difference]: With dead ends: 196 [2020-10-12 16:14:17,032 INFO L226 Difference]: Without dead ends: 183 [2020-10-12 16:14:17,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=48, Invalid=371, Unknown=1, NotChecked=0, Total=420 [2020-10-12 16:14:17,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-12 16:14:17,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 179. [2020-10-12 16:14:17,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-12 16:14:17,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 236 transitions. [2020-10-12 16:14:17,048 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 236 transitions. Word has length 26 [2020-10-12 16:14:17,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:17,048 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 236 transitions. [2020-10-12 16:14:17,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:14:17,049 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 236 transitions. [2020-10-12 16:14:17,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:14:17,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:17,049 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:17,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 16:14:17,050 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:17,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:17,050 INFO L82 PathProgramCache]: Analyzing trace with hash -782117460, now seen corresponding path program 12 times [2020-10-12 16:14:17,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:17,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893779590] [2020-10-12 16:14:17,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:17,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:17,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:17,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:17,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:17,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:14:17,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:14:17,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-10-12 16:14:17,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:17,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:14:17,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:17,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:14:17,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:17,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:17,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:17,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:17,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:17,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:17,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:17,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:17,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:17,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:17,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:17,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:17,687 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:17,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893779590] [2020-10-12 16:14:17,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:17,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:14:17,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488280138] [2020-10-12 16:14:17,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:14:17,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:17,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:14:17,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:14:17,689 INFO L87 Difference]: Start difference. First operand 179 states and 236 transitions. Second operand 16 states. [2020-10-12 16:14:18,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:18,302 INFO L93 Difference]: Finished difference Result 278 states and 404 transitions. [2020-10-12 16:14:18,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:14:18,303 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2020-10-12 16:14:18,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:18,305 INFO L225 Difference]: With dead ends: 278 [2020-10-12 16:14:18,305 INFO L226 Difference]: Without dead ends: 260 [2020-10-12 16:14:18,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:14:18,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-12 16:14:18,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 192. [2020-10-12 16:14:18,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-12 16:14:18,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 255 transitions. [2020-10-12 16:14:18,326 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 255 transitions. Word has length 26 [2020-10-12 16:14:18,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:18,326 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 255 transitions. [2020-10-12 16:14:18,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:14:18,326 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 255 transitions. [2020-10-12 16:14:18,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:14:18,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:18,327 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 16:14:18,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 16:14:18,327 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:18,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:18,328 INFO L82 PathProgramCache]: Analyzing trace with hash -134700010, now seen corresponding path program 15 times [2020-10-12 16:14:18,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:18,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120756354] [2020-10-12 16:14:18,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:18,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:18,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:18,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:18,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:14:18,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:18,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-12 16:14:18,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:18,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:14:18,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 16:14:18,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:14:18,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:18,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:18,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:18,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:18,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:18,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:18,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:18,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:18,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:18,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:18,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:18,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 16:14:18,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120756354] [2020-10-12 16:14:18,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:18,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:14:18,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095818854] [2020-10-12 16:14:18,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:14:18,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:18,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:14:18,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:14:18,482 INFO L87 Difference]: Start difference. First operand 192 states and 255 transitions. Second operand 6 states. [2020-10-12 16:14:18,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:18,579 INFO L93 Difference]: Finished difference Result 203 states and 267 transitions. [2020-10-12 16:14:18,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:14:18,580 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-12 16:14:18,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:18,581 INFO L225 Difference]: With dead ends: 203 [2020-10-12 16:14:18,582 INFO L226 Difference]: Without dead ends: 184 [2020-10-12 16:14:18,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:14:18,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-12 16:14:18,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 181. [2020-10-12 16:14:18,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-12 16:14:18,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 243 transitions. [2020-10-12 16:14:18,601 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 243 transitions. Word has length 27 [2020-10-12 16:14:18,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:18,601 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 243 transitions. [2020-10-12 16:14:18,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:14:18,601 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 243 transitions. [2020-10-12 16:14:18,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:14:18,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:18,602 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 16:14:18,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 16:14:18,602 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:18,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:18,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1522376698, now seen corresponding path program 16 times [2020-10-12 16:14:18,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:18,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536831571] [2020-10-12 16:14:18,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:18,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:18,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:18,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:18,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:14:18,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:14:18,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-12 16:14:18,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:18,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:14:18,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:14:18,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:14:18,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:18,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:18,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:18,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:18,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:18,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:18,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:18,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:18,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:18,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:18,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:18,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:18,961 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 16:14:18,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536831571] [2020-10-12 16:14:18,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:18,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:14:18,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767896168] [2020-10-12 16:14:18,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:14:18,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:18,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:14:18,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:14:18,962 INFO L87 Difference]: Start difference. First operand 181 states and 243 transitions. Second operand 7 states. [2020-10-12 16:14:21,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:21,432 INFO L93 Difference]: Finished difference Result 193 states and 258 transitions. [2020-10-12 16:14:21,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:14:21,433 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-12 16:14:21,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:21,434 INFO L225 Difference]: With dead ends: 193 [2020-10-12 16:14:21,434 INFO L226 Difference]: Without dead ends: 188 [2020-10-12 16:14:21,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:14:21,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-12 16:14:21,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 182. [2020-10-12 16:14:21,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-12 16:14:21,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 244 transitions. [2020-10-12 16:14:21,454 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 244 transitions. Word has length 27 [2020-10-12 16:14:21,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:21,454 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 244 transitions. [2020-10-12 16:14:21,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:14:21,455 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 244 transitions. [2020-10-12 16:14:21,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 16:14:21,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:21,455 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:21,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 16:14:21,456 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:21,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:21,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1733057145, now seen corresponding path program 13 times [2020-10-12 16:14:21,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:21,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335388249] [2020-10-12 16:14:21,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:21,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:21,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:21,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:21,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:21,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 16:14:21,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:14:21,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-10-12 16:14:21,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:21,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:14:21,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:21,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:14:21,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:22,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:22,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:22,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:22,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:22,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:22,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:22,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:22,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:22,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:22,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:22,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:22,159 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:22,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335388249] [2020-10-12 16:14:22,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:22,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:14:22,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65428204] [2020-10-12 16:14:22,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:14:22,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:22,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:14:22,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:14:22,161 INFO L87 Difference]: Start difference. First operand 182 states and 244 transitions. Second operand 17 states. [2020-10-12 16:14:22,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:22,843 INFO L93 Difference]: Finished difference Result 286 states and 422 transitions. [2020-10-12 16:14:22,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 16:14:22,844 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 27 [2020-10-12 16:14:22,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:22,846 INFO L225 Difference]: With dead ends: 286 [2020-10-12 16:14:22,847 INFO L226 Difference]: Without dead ends: 268 [2020-10-12 16:14:22,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:14:22,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-12 16:14:22,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 195. [2020-10-12 16:14:22,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-12 16:14:22,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 263 transitions. [2020-10-12 16:14:22,866 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 263 transitions. Word has length 27 [2020-10-12 16:14:22,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:22,866 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 263 transitions. [2020-10-12 16:14:22,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:14:22,866 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 263 transitions. [2020-10-12 16:14:22,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:14:22,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:22,867 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 16:14:22,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 16:14:22,867 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:22,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:22,868 INFO L82 PathProgramCache]: Analyzing trace with hash 86500396, now seen corresponding path program 17 times [2020-10-12 16:14:22,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:22,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182398020] [2020-10-12 16:14:22,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:22,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:22,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:22,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:23,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:23,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:14:23,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:14:23,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-10-12 16:14:23,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:23,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:14:23,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 16:14:23,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:14:23,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:23,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:23,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:23,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:23,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:23,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:23,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:23,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:23,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:23,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:23,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:23,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:23,187 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 16:14:23,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182398020] [2020-10-12 16:14:23,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:23,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:14:23,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415682944] [2020-10-12 16:14:23,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:14:23,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:23,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:14:23,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:14:23,189 INFO L87 Difference]: Start difference. First operand 195 states and 263 transitions. Second operand 7 states. [2020-10-12 16:14:23,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:23,789 INFO L93 Difference]: Finished difference Result 208 states and 278 transitions. [2020-10-12 16:14:23,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:14:23,790 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-12 16:14:23,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:23,792 INFO L225 Difference]: With dead ends: 208 [2020-10-12 16:14:23,792 INFO L226 Difference]: Without dead ends: 203 [2020-10-12 16:14:23,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:14:23,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-12 16:14:23,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 196. [2020-10-12 16:14:23,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-12 16:14:23,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 264 transitions. [2020-10-12 16:14:23,819 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 264 transitions. Word has length 28 [2020-10-12 16:14:23,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:23,820 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 264 transitions. [2020-10-12 16:14:23,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:14:23,820 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 264 transitions. [2020-10-12 16:14:23,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:14:23,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:23,821 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:23,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 16:14:23,821 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:23,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:23,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1906151468, now seen corresponding path program 8 times [2020-10-12 16:14:23,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:23,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509223171] [2020-10-12 16:14:23,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:23,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:23,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:23,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:27,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:27,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:14:27,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:27,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3468 [2020-10-12 16:14:27,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:27,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:14:27,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:27,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:14:27,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:27,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:27,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:27,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:27,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:27,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:27,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:27,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:27,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:27,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:27,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:27,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-12 16:14:27,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509223171] [2020-10-12 16:14:27,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:27,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:14:27,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103917275] [2020-10-12 16:14:27,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:14:27,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:27,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:14:27,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:14:27,483 INFO L87 Difference]: Start difference. First operand 196 states and 264 transitions. Second operand 12 states. [2020-10-12 16:14:27,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:27,903 INFO L93 Difference]: Finished difference Result 217 states and 286 transitions. [2020-10-12 16:14:27,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:14:27,904 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-12 16:14:27,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:27,906 INFO L225 Difference]: With dead ends: 217 [2020-10-12 16:14:27,906 INFO L226 Difference]: Without dead ends: 204 [2020-10-12 16:14:27,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:14:27,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-12 16:14:27,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 194. [2020-10-12 16:14:27,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-12 16:14:27,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 260 transitions. [2020-10-12 16:14:27,943 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 260 transitions. Word has length 28 [2020-10-12 16:14:27,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:27,943 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 260 transitions. [2020-10-12 16:14:27,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:14:27,943 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 260 transitions. [2020-10-12 16:14:27,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:14:27,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:27,954 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 16:14:27,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 16:14:27,955 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:27,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:27,955 INFO L82 PathProgramCache]: Analyzing trace with hash -2012983750, now seen corresponding path program 18 times [2020-10-12 16:14:27,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:27,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630633947] [2020-10-12 16:14:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:27,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:28,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:28,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:28,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:29,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:29,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:14:29,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:14:29,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1545 [2020-10-12 16:14:29,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:29,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:14:29,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:29,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:14:29,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:30,568 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 40 [2020-10-12 16:14:30,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:30,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:30,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:30,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:30,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:30,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:30,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:30,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:30,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:30,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:30,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:30,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630633947] [2020-10-12 16:14:30,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:30,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:14:30,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267012079] [2020-10-12 16:14:30,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:14:30,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:30,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:14:30,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:14:30,782 INFO L87 Difference]: Start difference. First operand 194 states and 260 transitions. Second operand 21 states. [2020-10-12 16:14:31,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:31,270 INFO L93 Difference]: Finished difference Result 208 states and 273 transitions. [2020-10-12 16:14:31,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:14:31,270 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 28 [2020-10-12 16:14:31,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:31,272 INFO L225 Difference]: With dead ends: 208 [2020-10-12 16:14:31,273 INFO L226 Difference]: Without dead ends: 194 [2020-10-12 16:14:31,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:14:31,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-12 16:14:31,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2020-10-12 16:14:31,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-12 16:14:31,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 259 transitions. [2020-10-12 16:14:31,296 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 259 transitions. Word has length 28 [2020-10-12 16:14:31,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:31,298 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 259 transitions. [2020-10-12 16:14:31,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:14:31,298 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 259 transitions. [2020-10-12 16:14:31,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:14:31,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:31,299 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 16:14:31,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 16:14:31,299 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:31,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:31,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1595762956, now seen corresponding path program 19 times [2020-10-12 16:14:31,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:31,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710585758] [2020-10-12 16:14:31,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:31,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:31,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:31,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:31,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:32,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:32,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:14:32,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:14:32,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 923 [2020-10-12 16:14:32,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:32,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:14:32,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:32,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:14:32,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:34,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:34,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:34,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:34,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:34,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:34,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:34,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:34,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:34,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:34,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:34,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:34,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:34,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710585758] [2020-10-12 16:14:34,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:34,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:14:34,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655093086] [2020-10-12 16:14:34,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:14:34,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:34,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:14:34,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=342, Unknown=1, NotChecked=0, Total=380 [2020-10-12 16:14:34,962 INFO L87 Difference]: Start difference. First operand 194 states and 259 transitions. Second operand 20 states. [2020-10-12 16:14:35,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:35,945 INFO L93 Difference]: Finished difference Result 223 states and 287 transitions. [2020-10-12 16:14:35,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:14:35,948 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-12 16:14:35,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:35,949 INFO L225 Difference]: With dead ends: 223 [2020-10-12 16:14:35,949 INFO L226 Difference]: Without dead ends: 209 [2020-10-12 16:14:35,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=60, Invalid=539, Unknown=1, NotChecked=0, Total=600 [2020-10-12 16:14:35,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-12 16:14:35,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 194. [2020-10-12 16:14:35,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-12 16:14:35,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 258 transitions. [2020-10-12 16:14:35,974 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 258 transitions. Word has length 28 [2020-10-12 16:14:35,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:35,974 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 258 transitions. [2020-10-12 16:14:35,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 16:14:35,974 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 258 transitions. [2020-10-12 16:14:35,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:14:35,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:35,975 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:35,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 16:14:35,976 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:35,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:35,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1147416308, now seen corresponding path program 14 times [2020-10-12 16:14:35,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:35,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311930501] [2020-10-12 16:14:35,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:35,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:36,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:36,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:36,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:14:36,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:14:36,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 448 [2020-10-12 16:14:36,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:36,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:14:36,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:36,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:14:36,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:36,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:36,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:36,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:36,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:36,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:36,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:36,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:36,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:36,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:36,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:36,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:36,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:14:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:36,803 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311930501] [2020-10-12 16:14:36,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:36,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:14:36,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276584689] [2020-10-12 16:14:36,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:14:36,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:36,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:14:36,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:14:36,804 INFO L87 Difference]: Start difference. First operand 194 states and 258 transitions. Second operand 18 states. [2020-10-12 16:14:37,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:37,567 INFO L93 Difference]: Finished difference Result 305 states and 448 transitions. [2020-10-12 16:14:37,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:14:37,568 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 28 [2020-10-12 16:14:37,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:37,570 INFO L225 Difference]: With dead ends: 305 [2020-10-12 16:14:37,570 INFO L226 Difference]: Without dead ends: 286 [2020-10-12 16:14:37,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:14:37,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-12 16:14:37,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 207. [2020-10-12 16:14:37,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-12 16:14:37,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 277 transitions. [2020-10-12 16:14:37,596 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 277 transitions. Word has length 28 [2020-10-12 16:14:37,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:37,597 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 277 transitions. [2020-10-12 16:14:37,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:14:37,597 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 277 transitions. [2020-10-12 16:14:37,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 16:14:37,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:37,598 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 16:14:37,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 16:14:37,598 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:37,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:37,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1577917242, now seen corresponding path program 20 times [2020-10-12 16:14:37,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:37,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879163928] [2020-10-12 16:14:37,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:37,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:37,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:37,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:37,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 16:14:37,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:14:37,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 268 [2020-10-12 16:14:37,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:37,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:14:37,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 16:14:37,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:14:37,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:37,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:37,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:37,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:37,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:37,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:37,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:37,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:37,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:37,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:37,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:37,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:37,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:37,987 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 16:14:37,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879163928] [2020-10-12 16:14:37,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:37,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:14:37,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241322436] [2020-10-12 16:14:37,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:14:37,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:37,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:14:37,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:14:37,988 INFO L87 Difference]: Start difference. First operand 207 states and 277 transitions. Second operand 8 states. [2020-10-12 16:14:38,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:38,144 INFO L93 Difference]: Finished difference Result 245 states and 330 transitions. [2020-10-12 16:14:38,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:14:38,145 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-12 16:14:38,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:38,147 INFO L225 Difference]: With dead ends: 245 [2020-10-12 16:14:38,147 INFO L226 Difference]: Without dead ends: 239 [2020-10-12 16:14:38,148 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 16:14:38,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-12 16:14:38,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 235. [2020-10-12 16:14:38,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-12 16:14:38,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 317 transitions. [2020-10-12 16:14:38,169 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 317 transitions. Word has length 29 [2020-10-12 16:14:38,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:38,169 INFO L479 AbstractCegarLoop]: Abstraction has 235 states and 317 transitions. [2020-10-12 16:14:38,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:14:38,169 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 317 transitions. [2020-10-12 16:14:38,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 16:14:38,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:38,170 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:14:38,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 16:14:38,170 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:38,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:38,171 INFO L82 PathProgramCache]: Analyzing trace with hash -172419545, now seen corresponding path program 15 times [2020-10-12 16:14:38,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:38,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285948538] [2020-10-12 16:14:38,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:38,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:38,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:38,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:38,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 16:14:38,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:14:38,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 418 [2020-10-12 16:14:38,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:38,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:14:38,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:38,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:14:38,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:39,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:39,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:39,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:39,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:39,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:39,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:39,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:39,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:39,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:39,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:39,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:39,126 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:39,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285948538] [2020-10-12 16:14:39,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:39,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:14:39,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170624984] [2020-10-12 16:14:39,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:14:39,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:39,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:14:39,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:14:39,128 INFO L87 Difference]: Start difference. First operand 235 states and 317 transitions. Second operand 19 states. [2020-10-12 16:14:40,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:40,013 INFO L93 Difference]: Finished difference Result 367 states and 549 transitions. [2020-10-12 16:14:40,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:14:40,014 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 29 [2020-10-12 16:14:40,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:40,016 INFO L225 Difference]: With dead ends: 367 [2020-10-12 16:14:40,016 INFO L226 Difference]: Without dead ends: 348 [2020-10-12 16:14:40,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:14:40,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-12 16:14:40,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 250. [2020-10-12 16:14:40,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-12 16:14:40,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 339 transitions. [2020-10-12 16:14:40,044 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 339 transitions. Word has length 29 [2020-10-12 16:14:40,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:40,044 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 339 transitions. [2020-10-12 16:14:40,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:14:40,044 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 339 transitions. [2020-10-12 16:14:40,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:14:40,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:40,045 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 16:14:40,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 16:14:40,046 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:40,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:40,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1635256468, now seen corresponding path program 21 times [2020-10-12 16:14:40,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:40,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954503506] [2020-10-12 16:14:40,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:40,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:40,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:40,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:40,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:40,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:41,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:41,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:14:41,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:14:41,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1143 [2020-10-12 16:14:41,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:41,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:14:41,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:41,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:14:41,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:42,136 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-10-12 16:14:42,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:42,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:42,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:42,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:42,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:42,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:42,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:42,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:42,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:42,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:42,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:42,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954503506] [2020-10-12 16:14:42,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:42,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 16:14:42,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794078102] [2020-10-12 16:14:42,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 16:14:42,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:42,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 16:14:42,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:14:42,356 INFO L87 Difference]: Start difference. First operand 250 states and 339 transitions. Second operand 23 states. [2020-10-12 16:14:45,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:45,197 INFO L93 Difference]: Finished difference Result 265 states and 353 transitions. [2020-10-12 16:14:45,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 16:14:45,197 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2020-10-12 16:14:45,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:45,199 INFO L225 Difference]: With dead ends: 265 [2020-10-12 16:14:45,199 INFO L226 Difference]: Without dead ends: 244 [2020-10-12 16:14:45,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:14:45,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-12 16:14:45,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2020-10-12 16:14:45,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-12 16:14:45,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 332 transitions. [2020-10-12 16:14:45,230 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 332 transitions. Word has length 30 [2020-10-12 16:14:45,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:45,231 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 332 transitions. [2020-10-12 16:14:45,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 16:14:45,231 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 332 transitions. [2020-10-12 16:14:45,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:14:45,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:45,233 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 16:14:45,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 16:14:45,233 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:45,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:45,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1879747484, now seen corresponding path program 22 times [2020-10-12 16:14:45,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:45,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975673782] [2020-10-12 16:14:45,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:45,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:45,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:45,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:46,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:47,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:47,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:14:47,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:14:47,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2154 [2020-10-12 16:14:47,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:47,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:14:47,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:47,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:14:47,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:49,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:49,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:49,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:49,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:49,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:49,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:49,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:49,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:49,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:49,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:49,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:49,020 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:14:49,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975673782] [2020-10-12 16:14:49,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:49,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 16:14:49,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073973563] [2020-10-12 16:14:49,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 16:14:49,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:49,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 16:14:49,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:14:49,022 INFO L87 Difference]: Start difference. First operand 244 states and 332 transitions. Second operand 23 states. [2020-10-12 16:14:49,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:49,452 INFO L93 Difference]: Finished difference Result 262 states and 349 transitions. [2020-10-12 16:14:49,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:14:49,458 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2020-10-12 16:14:49,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:49,459 INFO L225 Difference]: With dead ends: 262 [2020-10-12 16:14:49,459 INFO L226 Difference]: Without dead ends: 247 [2020-10-12 16:14:49,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:14:49,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-12 16:14:49,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 244. [2020-10-12 16:14:49,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-12 16:14:49,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 331 transitions. [2020-10-12 16:14:49,485 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 331 transitions. Word has length 30 [2020-10-12 16:14:49,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:49,485 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 331 transitions. [2020-10-12 16:14:49,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 16:14:49,485 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 331 transitions. [2020-10-12 16:14:49,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:14:49,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:49,486 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 16:14:49,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 16:14:49,487 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:49,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:49,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1421701084, now seen corresponding path program 23 times [2020-10-12 16:14:49,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:49,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555654601] [2020-10-12 16:14:49,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:49,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:49,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:49,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:49,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:14:49,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:14:49,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-10-12 16:14:49,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:49,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:14:49,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:14:49,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:14:49,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:49,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:49,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:49,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:49,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:49,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:49,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:14:49,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:49,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:49,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:49,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:49,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:49,984 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 16:14:49,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555654601] [2020-10-12 16:14:49,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:49,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:14:49,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739932508] [2020-10-12 16:14:49,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:14:49,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:49,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:14:49,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:14:49,986 INFO L87 Difference]: Start difference. First operand 244 states and 331 transitions. Second operand 11 states. [2020-10-12 16:14:50,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:50,476 INFO L93 Difference]: Finished difference Result 258 states and 352 transitions. [2020-10-12 16:14:50,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:14:50,477 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-12 16:14:50,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:50,478 INFO L225 Difference]: With dead ends: 258 [2020-10-12 16:14:50,478 INFO L226 Difference]: Without dead ends: 253 [2020-10-12 16:14:50,478 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 16:14:50,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-12 16:14:50,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 248. [2020-10-12 16:14:50,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-12 16:14:50,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 335 transitions. [2020-10-12 16:14:50,508 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 335 transitions. Word has length 30 [2020-10-12 16:14:50,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:50,508 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 335 transitions. [2020-10-12 16:14:50,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:14:50,508 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 335 transitions. [2020-10-12 16:14:50,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:14:50,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:50,510 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 16:14:50,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 16:14:50,511 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:50,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:50,511 INFO L82 PathProgramCache]: Analyzing trace with hash 559648122, now seen corresponding path program 9 times [2020-10-12 16:14:50,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:50,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918886776] [2020-10-12 16:14:50,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:50,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:50,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:50,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:50,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:52,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:52,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:14:52,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 16:14:52,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1933 [2020-10-12 16:14:52,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:52,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:14:52,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:52,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:14:52,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:52,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:52,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:52,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:52,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:52,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:52,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:52,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:52,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:52,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:52,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:52,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:52,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-12 16:14:52,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918886776] [2020-10-12 16:14:52,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:52,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:14:52,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261848620] [2020-10-12 16:14:52,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:14:52,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:52,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:14:52,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:14:52,707 INFO L87 Difference]: Start difference. First operand 248 states and 335 transitions. Second operand 14 states. [2020-10-12 16:14:53,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:53,265 INFO L93 Difference]: Finished difference Result 284 states and 372 transitions. [2020-10-12 16:14:53,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:14:53,266 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 30 [2020-10-12 16:14:53,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:53,268 INFO L225 Difference]: With dead ends: 284 [2020-10-12 16:14:53,268 INFO L226 Difference]: Without dead ends: 260 [2020-10-12 16:14:53,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:14:53,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-12 16:14:53,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 247. [2020-10-12 16:14:53,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-12 16:14:53,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 331 transitions. [2020-10-12 16:14:53,296 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 331 transitions. Word has length 30 [2020-10-12 16:14:53,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:53,296 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 331 transitions. [2020-10-12 16:14:53,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:14:53,296 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 331 transitions. [2020-10-12 16:14:53,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:14:53,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:53,297 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 16:14:53,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 16:14:53,298 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:53,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:53,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1716040044, now seen corresponding path program 24 times [2020-10-12 16:14:53,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:53,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511875986] [2020-10-12 16:14:53,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:53,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:53,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:53,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:53,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:54,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:54,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:14:54,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:14:54,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1509 [2020-10-12 16:14:54,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:54,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:14:54,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:14:54,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:14:54,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:56,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:14:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:56,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:56,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:14:56,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:14:56,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:14:56,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:14:56,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:14:56,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:14:56,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:14:56,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:14:56,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:14:56,119 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 16:14:56,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511875986] [2020-10-12 16:14:56,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:14:56,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:14:56,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229464944] [2020-10-12 16:14:56,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:14:56,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:14:56,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:14:56,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:14:56,120 INFO L87 Difference]: Start difference. First operand 247 states and 331 transitions. Second operand 21 states. [2020-10-12 16:14:59,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:14:59,109 INFO L93 Difference]: Finished difference Result 266 states and 349 transitions. [2020-10-12 16:14:59,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:14:59,110 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 30 [2020-10-12 16:14:59,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:14:59,112 INFO L225 Difference]: With dead ends: 266 [2020-10-12 16:14:59,112 INFO L226 Difference]: Without dead ends: 251 [2020-10-12 16:14:59,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:14:59,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-12 16:14:59,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 247. [2020-10-12 16:14:59,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-12 16:14:59,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 330 transitions. [2020-10-12 16:14:59,131 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 330 transitions. Word has length 30 [2020-10-12 16:14:59,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:14:59,131 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 330 transitions. [2020-10-12 16:14:59,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:14:59,132 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 330 transitions. [2020-10-12 16:14:59,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:14:59,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:14:59,132 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 16:14:59,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 16:14:59,132 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:14:59,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:14:59,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1337282148, now seen corresponding path program 25 times [2020-10-12 16:14:59,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:14:59,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236966547] [2020-10-12 16:14:59,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:14:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:14:59,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:59,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:59,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:14:59,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:00,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:00,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:15:00,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:15:00,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1115 [2020-10-12 16:15:00,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:00,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:15:00,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:00,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:15:00,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:01,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:01,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:01,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:01,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:01,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:01,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:01,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:01,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:01,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:01,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:01,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:01,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:01,760 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 16:15:01,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236966547] [2020-10-12 16:15:01,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:01,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 16:15:01,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173165625] [2020-10-12 16:15:01,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 16:15:01,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:01,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 16:15:01,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:15:01,762 INFO L87 Difference]: Start difference. First operand 247 states and 330 transitions. Second operand 22 states. [2020-10-12 16:15:04,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:04,811 INFO L93 Difference]: Finished difference Result 267 states and 349 transitions. [2020-10-12 16:15:04,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:15:04,812 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2020-10-12 16:15:04,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:04,814 INFO L225 Difference]: With dead ends: 267 [2020-10-12 16:15:04,814 INFO L226 Difference]: Without dead ends: 252 [2020-10-12 16:15:04,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:15:04,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-12 16:15:04,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 247. [2020-10-12 16:15:04,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-12 16:15:04,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 329 transitions. [2020-10-12 16:15:04,842 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 329 transitions. Word has length 30 [2020-10-12 16:15:04,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:04,843 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 329 transitions. [2020-10-12 16:15:04,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 16:15:04,843 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 329 transitions. [2020-10-12 16:15:04,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:15:04,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:04,844 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:04,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 16:15:04,844 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:04,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:04,845 INFO L82 PathProgramCache]: Analyzing trace with hash -12290964, now seen corresponding path program 16 times [2020-10-12 16:15:04,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:04,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412511857] [2020-10-12 16:15:04,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:04,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:04,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:05,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:05,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:15:05,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:15:05,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 975 [2020-10-12 16:15:05,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:05,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:15:05,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:05,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:15:05,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:06,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:06,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:06,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:06,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:06,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:06,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:06,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:06,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:06,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:06,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:06,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:06,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:15:06,558 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:06,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412511857] [2020-10-12 16:15:06,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:06,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:15:06,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639031682] [2020-10-12 16:15:06,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:15:06,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:06,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:15:06,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:15:06,561 INFO L87 Difference]: Start difference. First operand 247 states and 329 transitions. Second operand 20 states. [2020-10-12 16:15:07,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:07,753 INFO L93 Difference]: Finished difference Result 393 states and 581 transitions. [2020-10-12 16:15:07,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:15:07,754 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 30 [2020-10-12 16:15:07,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:07,756 INFO L225 Difference]: With dead ends: 393 [2020-10-12 16:15:07,756 INFO L226 Difference]: Without dead ends: 370 [2020-10-12 16:15:07,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:15:07,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-10-12 16:15:07,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 262. [2020-10-12 16:15:07,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-12 16:15:07,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 351 transitions. [2020-10-12 16:15:07,787 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 351 transitions. Word has length 30 [2020-10-12 16:15:07,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:07,787 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 351 transitions. [2020-10-12 16:15:07,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 16:15:07,787 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 351 transitions. [2020-10-12 16:15:07,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 16:15:07,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:07,789 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:15:07,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 16:15:07,789 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:07,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:07,789 INFO L82 PathProgramCache]: Analyzing trace with hash 656727751, now seen corresponding path program 17 times [2020-10-12 16:15:07,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:07,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730927811] [2020-10-12 16:15:07,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:07,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:07,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:08,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:08,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 16:15:08,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:15:08,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 516 [2020-10-12 16:15:08,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:08,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:15:08,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:08,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:15:08,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:08,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:08,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:08,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:08,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:08,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:08,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:08,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:15:08,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:08,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:08,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:08,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:08,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:08,845 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:08,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730927811] [2020-10-12 16:15:08,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:08,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:15:08,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928964768] [2020-10-12 16:15:08,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:15:08,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:08,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:15:08,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:15:08,847 INFO L87 Difference]: Start difference. First operand 262 states and 351 transitions. Second operand 21 states. [2020-10-12 16:15:09,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:09,933 INFO L93 Difference]: Finished difference Result 414 states and 615 transitions. [2020-10-12 16:15:09,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 16:15:09,934 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 31 [2020-10-12 16:15:09,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:09,937 INFO L225 Difference]: With dead ends: 414 [2020-10-12 16:15:09,937 INFO L226 Difference]: Without dead ends: 391 [2020-10-12 16:15:09,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:15:09,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-10-12 16:15:09,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 277. [2020-10-12 16:15:09,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-12 16:15:09,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 373 transitions. [2020-10-12 16:15:09,964 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 373 transitions. Word has length 31 [2020-10-12 16:15:09,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:09,964 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 373 transitions. [2020-10-12 16:15:09,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:15:09,964 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 373 transitions. [2020-10-12 16:15:09,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 16:15:09,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:09,965 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 16:15:09,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 16:15:09,966 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:09,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:09,966 INFO L82 PathProgramCache]: Analyzing trace with hash -928044148, now seen corresponding path program 26 times [2020-10-12 16:15:09,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:09,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015431621] [2020-10-12 16:15:09,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:09,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:09,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:10,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:10,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:10,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:11,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:11,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:15:11,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:15:11,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1361 [2020-10-12 16:15:11,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:11,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:15:11,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:11,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 16:15:11,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:13,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:13,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:13,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:13,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:13,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:13,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:13,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:13,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:13,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:13,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:13,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:13,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:15:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:15:13,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015431621] [2020-10-12 16:15:13,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:13,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 16:15:13,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356643124] [2020-10-12 16:15:13,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 16:15:13,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:13,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 16:15:13,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:15:13,069 INFO L87 Difference]: Start difference. First operand 277 states and 373 transitions. Second operand 22 states. [2020-10-12 16:15:24,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:24,425 INFO L93 Difference]: Finished difference Result 296 states and 391 transitions. [2020-10-12 16:15:24,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:15:24,426 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2020-10-12 16:15:24,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:24,428 INFO L225 Difference]: With dead ends: 296 [2020-10-12 16:15:24,428 INFO L226 Difference]: Without dead ends: 280 [2020-10-12 16:15:24,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:15:24,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-12 16:15:24,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 277. [2020-10-12 16:15:24,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-12 16:15:24,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 372 transitions. [2020-10-12 16:15:24,465 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 372 transitions. Word has length 32 [2020-10-12 16:15:24,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:24,466 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 372 transitions. [2020-10-12 16:15:24,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 16:15:24,466 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 372 transitions. [2020-10-12 16:15:24,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 16:15:24,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:24,467 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 16:15:24,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 16:15:24,467 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:24,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:24,468 INFO L82 PathProgramCache]: Analyzing trace with hash 872332460, now seen corresponding path program 10 times [2020-10-12 16:15:24,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:24,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047175389] [2020-10-12 16:15:24,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:24,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:24,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:24,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:24,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:15:24,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:15:24,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 366 [2020-10-12 16:15:24,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:24,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:15:24,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 16:15:24,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:15:24,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:25,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:15:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:25,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:25,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:25,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:15:25,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:15:25,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:15:25,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:25,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:15:25,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:15:25,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:15:25,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:15:25,060 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 16:15:25,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047175389] [2020-10-12 16:15:25,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:15:25,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:15:25,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765766160] [2020-10-12 16:15:25,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:15:25,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:15:25,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:15:25,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:15:25,062 INFO L87 Difference]: Start difference. First operand 277 states and 372 transitions. Second operand 11 states. [2020-10-12 16:15:27,508 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2020-10-12 16:15:28,416 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 17 [2020-10-12 16:15:28,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:15:28,687 INFO L93 Difference]: Finished difference Result 328 states and 445 transitions. [2020-10-12 16:15:28,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:15:28,688 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-10-12 16:15:28,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:15:28,689 INFO L225 Difference]: With dead ends: 328 [2020-10-12 16:15:28,689 INFO L226 Difference]: Without dead ends: 323 [2020-10-12 16:15:28,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:15:28,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-10-12 16:15:28,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 311. [2020-10-12 16:15:28,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-10-12 16:15:28,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 420 transitions. [2020-10-12 16:15:28,723 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 420 transitions. Word has length 32 [2020-10-12 16:15:28,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:15:28,724 INFO L479 AbstractCegarLoop]: Abstraction has 311 states and 420 transitions. [2020-10-12 16:15:28,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:15:28,724 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 420 transitions. [2020-10-12 16:15:28,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 16:15:28,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:15:28,725 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 16:15:28,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-12 16:15:28,725 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:15:28,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:15:28,726 INFO L82 PathProgramCache]: Analyzing trace with hash 456275770, now seen corresponding path program 27 times [2020-10-12 16:15:28,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:15:28,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562350290] [2020-10-12 16:15:28,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:15:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:15:28,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:28,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:29,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:29,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:15:30,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:15:30,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:15:30,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 16:15:30,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1525 [2020-10-12 16:15:30,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:15:30,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:15:30,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:15:30,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 16:15:30,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0