/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de52.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:56:15,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:56:15,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:56:15,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:56:15,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:56:15,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:56:15,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:56:15,309 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:56:15,311 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:56:15,314 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:56:15,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:56:15,316 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:56:15,316 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:56:15,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:56:15,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:56:15,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:56:15,328 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:56:15,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:56:15,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:56:15,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:56:15,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:56:15,342 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:56:15,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:56:15,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:56:15,358 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:56:15,358 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:56:15,358 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:56:15,362 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:56:15,363 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:56:15,364 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:56:15,364 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:56:15,364 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:56:15,365 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:56:15,366 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:56:15,366 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:56:15,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:56:15,372 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:56:15,372 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:56:15,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:56:15,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:56:15,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:56:15,376 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 10:56:15,400 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:56:15,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:56:15,401 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:56:15,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:56:15,401 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:56:15,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:56:15,402 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:56:15,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:56:15,402 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:56:15,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:56:15,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:56:15,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:56:15,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:56:15,403 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:56:15,403 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:56:15,404 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:56:15,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:56:15,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:56:15,404 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:56:15,404 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:56:15,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:56:15,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:56:15,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:56:15,405 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:56:15,405 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:56:15,405 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:56:15,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:56:15,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:56:15,406 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:56:15,406 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:56:15,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:56:15,721 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:56:15,725 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:56:15,726 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:56:15,727 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:56:15,727 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de52.c [2020-10-13 10:56:15,793 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea50cdb84/3c1916d59725460bbb061ec399587688/FLAGec56cd56b [2020-10-13 10:56:16,234 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:56:16,235 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/in-de52.c [2020-10-13 10:56:16,241 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea50cdb84/3c1916d59725460bbb061ec399587688/FLAGec56cd56b [2020-10-13 10:56:16,614 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ea50cdb84/3c1916d59725460bbb061ec399587688 [2020-10-13 10:56:16,624 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:56:16,627 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:56:16,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:56:16,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:56:16,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:56:16,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:56:16" (1/1) ... [2020-10-13 10:56:16,637 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f12d333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:16, skipping insertion in model container [2020-10-13 10:56:16,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:56:16" (1/1) ... [2020-10-13 10:56:16,645 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:56:16,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:56:16,838 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:56:16,843 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:56:16,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:56:16,875 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:56:16,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:16 WrapperNode [2020-10-13 10:56:16,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:56:16,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:56:16,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:56:16,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:56:16,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:16" (1/1) ... [2020-10-13 10:56:16,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:16" (1/1) ... [2020-10-13 10:56:16,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:16" (1/1) ... [2020-10-13 10:56:16,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:16" (1/1) ... [2020-10-13 10:56:16,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:16" (1/1) ... [2020-10-13 10:56:16,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:16" (1/1) ... [2020-10-13 10:56:16,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:16" (1/1) ... [2020-10-13 10:56:16,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:56:16,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:56:16,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:56:16,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:56:17,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:56:17,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:56:17,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:56:17,060 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 10:56:17,060 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:56:17,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:56:17,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-13 10:56:17,061 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 10:56:17,061 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:56:17,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:56:17,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:56:17,285 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:56:17,286 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-13 10:56:17,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:56:17 BoogieIcfgContainer [2020-10-13 10:56:17,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:56:17,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:56:17,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:56:17,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:56:17,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:56:16" (1/3) ... [2020-10-13 10:56:17,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0809ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:56:17, skipping insertion in model container [2020-10-13 10:56:17,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:56:16" (2/3) ... [2020-10-13 10:56:17,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0809ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:56:17, skipping insertion in model container [2020-10-13 10:56:17,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:56:17" (3/3) ... [2020-10-13 10:56:17,298 INFO L109 eAbstractionObserver]: Analyzing ICFG in-de52.c [2020-10-13 10:56:17,309 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:56:17,317 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:56:17,332 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:56:17,397 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:56:17,397 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:56:17,397 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:56:17,398 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:56:17,398 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:56:17,398 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:56:17,398 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:56:17,398 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:56:17,421 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-13 10:56:17,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 10:56:17,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:17,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:17,430 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:17,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:17,436 INFO L82 PathProgramCache]: Analyzing trace with hash -255424134, now seen corresponding path program 1 times [2020-10-13 10:56:17,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:17,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647802797] [2020-10-13 10:56:17,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:17,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:17,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:17,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:17,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:17,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:17,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:17,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:56:17,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:56:17,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 316 [2020-10-13 10:56:17,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:17,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:17,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:56:17,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:17,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 10:56:17,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:17,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:17,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:17,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:17,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:17,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:56:17,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:17,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:17,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:17,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:17,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:17,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:56:17,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647802797] [2020-10-13 10:56:17,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:56:17,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-13 10:56:17,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578488074] [2020-10-13 10:56:17,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-13 10:56:17,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:17,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-13 10:56:17,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 10:56:17,973 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-10-13 10:56:18,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:18,006 INFO L93 Difference]: Finished difference Result 40 states and 59 transitions. [2020-10-13 10:56:18,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-13 10:56:18,008 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-10-13 10:56:18,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:18,019 INFO L225 Difference]: With dead ends: 40 [2020-10-13 10:56:18,019 INFO L226 Difference]: Without dead ends: 16 [2020-10-13 10:56:18,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-13 10:56:18,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-13 10:56:18,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-13 10:56:18,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-13 10:56:18,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2020-10-13 10:56:18,060 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 15 [2020-10-13 10:56:18,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:18,061 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2020-10-13 10:56:18,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-13 10:56:18,061 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2020-10-13 10:56:18,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 10:56:18,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:18,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:18,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:56:18,063 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:18,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:18,064 INFO L82 PathProgramCache]: Analyzing trace with hash -369940738, now seen corresponding path program 1 times [2020-10-13 10:56:18,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:18,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568769544] [2020-10-13 10:56:18,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:18,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:18,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:18,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:18,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:18,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:18,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 10:56:18,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:56:18,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 263 [2020-10-13 10:56:18,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:18,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:56:18,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:56:18,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:56:18,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:18,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:18,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:18,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:18,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:18,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:18,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:56:18,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:18,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:18,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:18,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:18,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:18,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:56:18,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568769544] [2020-10-13 10:56:18,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:56:18,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 10:56:18,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930339674] [2020-10-13 10:56:18,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:56:18,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:18,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:56:18,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:56:18,472 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 5 states. [2020-10-13 10:56:18,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:18,549 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2020-10-13 10:56:18,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:56:18,550 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-13 10:56:18,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:18,551 INFO L225 Difference]: With dead ends: 33 [2020-10-13 10:56:18,551 INFO L226 Difference]: Without dead ends: 22 [2020-10-13 10:56:18,553 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 [2020-10-13 10:56:18,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-13 10:56:18,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-13 10:56:18,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-13 10:56:18,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2020-10-13 10:56:18,560 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 15 [2020-10-13 10:56:18,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:18,561 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2020-10-13 10:56:18,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:56:18,561 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2020-10-13 10:56:18,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:56:18,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:18,562 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:18,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:56:18,563 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:18,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:18,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1439862098, now seen corresponding path program 1 times [2020-10-13 10:56:18,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:18,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140023477] [2020-10-13 10:56:18,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:18,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:18,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:18,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:56:18,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:18,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-13 10:56:18,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:18,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:56:18,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 10:56:18,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:56:18,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:18,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:18,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:18,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:18,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:18,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:18,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:18,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:18,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:18,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:18,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:18,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 15 [2020-10-13 10:56:18,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:56:18,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140023477] [2020-10-13 10:56:18,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:56:18,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:56:18,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613833574] [2020-10-13 10:56:18,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:56:18,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:18,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:56:18,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:56:18,636 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand 3 states. [2020-10-13 10:56:18,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:18,664 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2020-10-13 10:56:18,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:56:18,665 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-13 10:56:18,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:18,666 INFO L225 Difference]: With dead ends: 34 [2020-10-13 10:56:18,666 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 10:56:18,666 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 [2020-10-13 10:56:18,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 10:56:18,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-13 10:56:18,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 10:56:18,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-10-13 10:56:18,673 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 16 [2020-10-13 10:56:18,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:18,674 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-10-13 10:56:18,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:56:18,674 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-10-13 10:56:18,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-13 10:56:18,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:18,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:18,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 10:56:18,676 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:18,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:18,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1452276799, now seen corresponding path program 1 times [2020-10-13 10:56:18,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:18,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574591348] [2020-10-13 10:56:18,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:18,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:18,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:18,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:18,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:18,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:18,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-13 10:56:18,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:56:18,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-13 10:56:18,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:18,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 10:56:18,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:56:18,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:56:18,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:18,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:18,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:18,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:18,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:18,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:18,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:18,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:18,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:18,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:18,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:18,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:18,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:18,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:56:18,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574591348] [2020-10-13 10:56:18,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:56:18,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 10:56:18,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861709146] [2020-10-13 10:56:18,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 10:56:18,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:18,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 10:56:18,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 10:56:18,899 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2020-10-13 10:56:18,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:18,929 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2020-10-13 10:56:18,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 10:56:18,930 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-13 10:56:18,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:18,932 INFO L225 Difference]: With dead ends: 40 [2020-10-13 10:56:18,932 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 10:56:18,933 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 [2020-10-13 10:56:18,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 10:56:18,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-13 10:56:18,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 10:56:18,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-13 10:56:18,940 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 16 [2020-10-13 10:56:18,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:18,941 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-13 10:56:18,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 10:56:18,941 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-13 10:56:18,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 10:56:18,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:18,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:18,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 10:56:18,943 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:18,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:18,943 INFO L82 PathProgramCache]: Analyzing trace with hash 879719134, now seen corresponding path program 1 times [2020-10-13 10:56:18,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:18,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131564958] [2020-10-13 10:56:18,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:18,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:18,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:18,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:18,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 10:56:18,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:18,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-13 10:56:18,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:18,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:56:18,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:56:18,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 10:56:18,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:19,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:19,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:19,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:19,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:19,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:19,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:19,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:19,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:19,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:19,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:19,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:19,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 10:56:19,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131564958] [2020-10-13 10:56:19,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:19,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:56:19,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737316160] [2020-10-13 10:56:19,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:56:19,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:19,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:56:19,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:56:19,041 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-13 10:56:19,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:19,088 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2020-10-13 10:56:19,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:56:19,088 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-13 10:56:19,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:19,089 INFO L225 Difference]: With dead ends: 36 [2020-10-13 10:56:19,089 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 10:56:19,090 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 [2020-10-13 10:56:19,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 10:56:19,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-13 10:56:19,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 10:56:19,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2020-10-13 10:56:19,096 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 17 [2020-10-13 10:56:19,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:19,096 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2020-10-13 10:56:19,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:56:19,097 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2020-10-13 10:56:19,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 10:56:19,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:19,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:19,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 10:56:19,098 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:19,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:19,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1333221619, now seen corresponding path program 1 times [2020-10-13 10:56:19,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:19,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912070435] [2020-10-13 10:56:19,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:19,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:19,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:19,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:19,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:19,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:19,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-13 10:56:19,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 10:56:19,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-13 10:56:19,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:19,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:56:19,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:56:19,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 10:56:19,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:19,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:19,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:19,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:19,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:19,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:19,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:19,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:19,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:19,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:19,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:19,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:56:19,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912070435] [2020-10-13 10:56:19,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:56:19,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:56:19,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458344773] [2020-10-13 10:56:19,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:56:19,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:19,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:56:19,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:56:19,271 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 4 states. [2020-10-13 10:56:19,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:19,318 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2020-10-13 10:56:19,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:56:19,319 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-13 10:56:19,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:19,319 INFO L225 Difference]: With dead ends: 31 [2020-10-13 10:56:19,320 INFO L226 Difference]: Without dead ends: 21 [2020-10-13 10:56:19,320 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 [2020-10-13 10:56:19,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-13 10:56:19,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-13 10:56:19,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-13 10:56:19,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2020-10-13 10:56:19,325 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 18 [2020-10-13 10:56:19,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:19,325 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2020-10-13 10:56:19,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:56:19,326 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2020-10-13 10:56:19,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:56:19,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:19,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:19,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 10:56:19,327 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:19,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:19,327 INFO L82 PathProgramCache]: Analyzing trace with hash 2055309710, now seen corresponding path program 1 times [2020-10-13 10:56:19,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:19,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109598854] [2020-10-13 10:56:19,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:19,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:19,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:19,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:19,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:19,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:56:19,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:19,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-13 10:56:19,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:19,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:56:19,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:56:19,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:56:19,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:19,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:19,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:19,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:19,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:19,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:19,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:19,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:19,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:19,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:19,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:19,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:19,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:56:19,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109598854] [2020-10-13 10:56:19,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:19,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:56:19,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055055514] [2020-10-13 10:56:19,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:56:19,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:19,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:56:19,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:56:19,489 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 4 states. [2020-10-13 10:56:19,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:19,522 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2020-10-13 10:56:19,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:56:19,524 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-13 10:56:19,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:19,526 INFO L225 Difference]: With dead ends: 31 [2020-10-13 10:56:19,526 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 10:56:19,527 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 [2020-10-13 10:56:19,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 10:56:19,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-10-13 10:56:19,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 10:56:19,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2020-10-13 10:56:19,532 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 19 [2020-10-13 10:56:19,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:19,532 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2020-10-13 10:56:19,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:56:19,533 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2020-10-13 10:56:19,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 10:56:19,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:19,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:19,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 10:56:19,534 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:19,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:19,541 INFO L82 PathProgramCache]: Analyzing trace with hash 652481311, now seen corresponding path program 1 times [2020-10-13 10:56:19,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:19,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255729552] [2020-10-13 10:56:19,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:19,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:19,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:19,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:19,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 10:56:19,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:19,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-10-13 10:56:19,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:19,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 10:56:19,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:56:19,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:56:19,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:19,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:19,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:19,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:19,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:19,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:19,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:19,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:19,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:19,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:19,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:19,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:19,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:19,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:56:19,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255729552] [2020-10-13 10:56:19,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:19,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:56:19,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825640056] [2020-10-13 10:56:19,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:56:19,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:19,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:56:19,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:56:19,637 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand 4 states. [2020-10-13 10:56:19,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:19,671 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2020-10-13 10:56:19,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:56:19,672 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-13 10:56:19,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:19,673 INFO L225 Difference]: With dead ends: 36 [2020-10-13 10:56:19,673 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 10:56:19,674 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 [2020-10-13 10:56:19,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 10:56:19,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-13 10:56:19,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 10:56:19,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2020-10-13 10:56:19,678 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 19 [2020-10-13 10:56:19,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:19,679 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2020-10-13 10:56:19,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:56:19,679 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2020-10-13 10:56:19,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:56:19,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:19,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:19,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 10:56:19,680 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:19,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:19,681 INFO L82 PathProgramCache]: Analyzing trace with hash -674370641, now seen corresponding path program 1 times [2020-10-13 10:56:19,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:19,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031075150] [2020-10-13 10:56:19,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:19,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:19,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:19,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:19,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:20,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:20,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:56:20,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:56:20,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 751 [2020-10-13 10:56:20,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:20,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:56:20,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 10:56:20,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:56:20,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:20,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:20,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:20,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:20,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:20,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:20,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:20,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:20,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:20,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:20,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:20,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:20,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:56:20,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031075150] [2020-10-13 10:56:20,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:20,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:56:20,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62563497] [2020-10-13 10:56:20,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:56:20,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:20,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:56:20,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:56:20,546 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand 6 states. [2020-10-13 10:56:20,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:20,645 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2020-10-13 10:56:20,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:56:20,646 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-13 10:56:20,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:20,648 INFO L225 Difference]: With dead ends: 61 [2020-10-13 10:56:20,648 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 10:56:20,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:56:20,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 10:56:20,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-10-13 10:56:20,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 10:56:20,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 60 transitions. [2020-10-13 10:56:20,667 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 60 transitions. Word has length 20 [2020-10-13 10:56:20,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:20,667 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 60 transitions. [2020-10-13 10:56:20,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:56:20,668 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 60 transitions. [2020-10-13 10:56:20,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 10:56:20,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:20,669 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:20,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 10:56:20,670 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:20,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:20,671 INFO L82 PathProgramCache]: Analyzing trace with hash 2079729997, now seen corresponding path program 2 times [2020-10-13 10:56:20,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:20,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206073619] [2020-10-13 10:56:20,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:20,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:20,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:20,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:20,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:20,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:21,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:21,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 10:56:21,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:56:21,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1034 [2020-10-13 10:56:21,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:21,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:56:21,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:56:21,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 10:56:21,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:21,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:21,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:21,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:21,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:21,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:21,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:21,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:21,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:21,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:21,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:21,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:21,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 10:56:21,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206073619] [2020-10-13 10:56:21,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:21,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:56:21,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369250396] [2020-10-13 10:56:21,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:56:21,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:21,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:56:21,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:56:21,782 INFO L87 Difference]: Start difference. First operand 43 states and 60 transitions. Second operand 6 states. [2020-10-13 10:56:21,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:21,902 INFO L93 Difference]: Finished difference Result 56 states and 76 transitions. [2020-10-13 10:56:21,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:56:21,903 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-13 10:56:21,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:21,904 INFO L225 Difference]: With dead ends: 56 [2020-10-13 10:56:21,904 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 10:56:21,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:56:21,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 10:56:21,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2020-10-13 10:56:21,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 10:56:21,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2020-10-13 10:56:21,911 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 20 [2020-10-13 10:56:21,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:21,911 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2020-10-13 10:56:21,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:56:21,911 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2020-10-13 10:56:21,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 10:56:21,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:21,912 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:21,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 10:56:21,913 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:21,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:21,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1142891807, now seen corresponding path program 2 times [2020-10-13 10:56:21,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:21,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742034758] [2020-10-13 10:56:21,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:21,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:21,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:21,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:56:21,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:21,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-13 10:56:21,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:21,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:56:21,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 10:56:21,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:56:21,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:22,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:22,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:22,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:22,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:22,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:22,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:22,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:22,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:22,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:22,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:22,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:56:22,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742034758] [2020-10-13 10:56:22,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:22,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:56:22,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443466765] [2020-10-13 10:56:22,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:56:22,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:22,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:56:22,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:56:22,023 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand 4 states. [2020-10-13 10:56:22,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:22,054 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2020-10-13 10:56:22,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:56:22,055 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-13 10:56:22,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:22,056 INFO L225 Difference]: With dead ends: 48 [2020-10-13 10:56:22,056 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 10:56:22,057 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 [2020-10-13 10:56:22,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 10:56:22,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-13 10:56:22,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 10:56:22,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2020-10-13 10:56:22,063 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 21 [2020-10-13 10:56:22,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:22,063 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2020-10-13 10:56:22,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:56:22,063 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2020-10-13 10:56:22,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 10:56:22,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:22,064 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:22,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 10:56:22,065 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:22,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:22,065 INFO L82 PathProgramCache]: Analyzing trace with hash 604884398, now seen corresponding path program 3 times [2020-10-13 10:56:22,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:22,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165540650] [2020-10-13 10:56:22,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:22,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:22,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:22,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:22,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:22,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:22,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:56:22,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:56:22,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 476 [2020-10-13 10:56:22,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:22,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:56:22,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:56:22,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:56:22,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:22,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:22,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:22,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:22,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:22,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:22,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:22,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:22,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:22,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:22,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:22,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 10:56:22,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 10:56:22,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165540650] [2020-10-13 10:56:22,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:22,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-13 10:56:22,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746810552] [2020-10-13 10:56:22,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:56:22,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:22,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:56:22,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:56:22,614 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 4 states. [2020-10-13 10:56:22,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:22,657 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2020-10-13 10:56:22,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:56:22,657 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-13 10:56:22,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:22,658 INFO L225 Difference]: With dead ends: 46 [2020-10-13 10:56:22,658 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 10:56:22,659 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 [2020-10-13 10:56:22,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 10:56:22,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-13 10:56:22,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 10:56:22,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2020-10-13 10:56:22,667 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 21 [2020-10-13 10:56:22,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:22,667 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2020-10-13 10:56:22,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:56:22,667 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2020-10-13 10:56:22,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 10:56:22,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:22,668 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:22,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 10:56:22,669 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:22,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:22,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1621002398, now seen corresponding path program 2 times [2020-10-13 10:56:22,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:22,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548351605] [2020-10-13 10:56:22,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:22,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:22,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:22,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:22,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:22,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:23,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:23,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 10:56:23,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:56:23,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 568 [2020-10-13 10:56:23,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:23,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:56:23,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:56:23,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 10:56:23,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:23,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:23,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:23,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:23,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:23,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:23,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:23,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:23,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:23,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:23,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:23,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:56:23,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 10:56:23,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548351605] [2020-10-13 10:56:23,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:23,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:56:23,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194352630] [2020-10-13 10:56:23,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:56:23,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:23,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:56:23,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:56:23,322 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand 6 states. [2020-10-13 10:56:23,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:23,411 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2020-10-13 10:56:23,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:56:23,412 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-13 10:56:23,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:23,413 INFO L225 Difference]: With dead ends: 40 [2020-10-13 10:56:23,413 INFO L226 Difference]: Without dead ends: 27 [2020-10-13 10:56:23,413 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 [2020-10-13 10:56:23,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-13 10:56:23,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-13 10:56:23,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 10:56:23,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2020-10-13 10:56:23,417 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 21 [2020-10-13 10:56:23,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:23,418 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2020-10-13 10:56:23,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:56:23,418 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2020-10-13 10:56:23,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 10:56:23,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:23,419 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:23,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 10:56:23,419 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:23,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:23,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1791890094, now seen corresponding path program 3 times [2020-10-13 10:56:23,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:23,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661764340] [2020-10-13 10:56:23,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:23,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:23,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:23,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:23,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:23,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:23,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:56:23,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:56:23,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 389 [2020-10-13 10:56:23,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:23,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:56:23,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 10:56:23,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:56:23,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:23,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:23,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:23,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:23,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:23,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:23,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:23,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:23,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:23,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:23,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:23,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 10:56:23,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661764340] [2020-10-13 10:56:23,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:23,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:56:23,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506935963] [2020-10-13 10:56:23,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:56:23,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:23,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:56:23,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:56:23,874 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 5 states. [2020-10-13 10:56:23,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:23,913 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2020-10-13 10:56:23,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:56:23,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-13 10:56:23,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:23,915 INFO L225 Difference]: With dead ends: 38 [2020-10-13 10:56:23,915 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 10:56:23,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:56:23,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 10:56:23,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-13 10:56:23,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 10:56:23,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-13 10:56:23,920 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 22 [2020-10-13 10:56:23,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:23,920 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-13 10:56:23,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:56:23,920 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-13 10:56:23,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 10:56:23,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:23,921 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:23,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 10:56:23,922 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:23,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:23,922 INFO L82 PathProgramCache]: Analyzing trace with hash 389061695, now seen corresponding path program 3 times [2020-10-13 10:56:23,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:23,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343012764] [2020-10-13 10:56:23,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:23,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:23,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:23,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:23,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:24,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:24,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:24,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 10:56:24,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:56:24,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 478 [2020-10-13 10:56:24,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:24,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:56:24,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 10:56:24,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:56:24,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:24,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:24,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:24,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:24,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:24,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:24,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:24,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:24,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:24,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:24,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:24,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:24,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:24,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 10:56:24,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343012764] [2020-10-13 10:56:24,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:24,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:56:24,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022251395] [2020-10-13 10:56:24,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:56:24,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:24,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:56:24,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:56:24,486 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 6 states. [2020-10-13 10:56:24,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:24,561 INFO L93 Difference]: Finished difference Result 48 states and 67 transitions. [2020-10-13 10:56:24,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:56:24,562 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-13 10:56:24,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:24,563 INFO L225 Difference]: With dead ends: 48 [2020-10-13 10:56:24,563 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 10:56:24,564 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 [2020-10-13 10:56:24,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 10:56:24,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-10-13 10:56:24,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 10:56:24,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 49 transitions. [2020-10-13 10:56:24,569 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 49 transitions. Word has length 22 [2020-10-13 10:56:24,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:24,569 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 49 transitions. [2020-10-13 10:56:24,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:56:24,569 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 49 transitions. [2020-10-13 10:56:24,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 10:56:24,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:24,570 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:24,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 10:56:24,571 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:24,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:24,571 INFO L82 PathProgramCache]: Analyzing trace with hash -788451554, now seen corresponding path program 4 times [2020-10-13 10:56:24,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:24,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638470112] [2020-10-13 10:56:24,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:24,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:24,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:24,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:24,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 10:56:24,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:24,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-13 10:56:24,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:24,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 10:56:24,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:56:24,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:56:24,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:24,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:24,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:24,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:24,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:24,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:24,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:24,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:24,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:24,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:24,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:24,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:24,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 10:56:24,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638470112] [2020-10-13 10:56:24,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:24,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 10:56:24,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261348590] [2020-10-13 10:56:24,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 10:56:24,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:24,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 10:56:24,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:56:24,779 INFO L87 Difference]: Start difference. First operand 36 states and 49 transitions. Second operand 5 states. [2020-10-13 10:56:24,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:24,814 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2020-10-13 10:56:24,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 10:56:24,814 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-13 10:56:24,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:24,815 INFO L225 Difference]: With dead ends: 55 [2020-10-13 10:56:24,815 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 10:56:24,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:56:24,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 10:56:24,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-13 10:56:24,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 10:56:24,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2020-10-13 10:56:24,820 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 23 [2020-10-13 10:56:24,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:24,820 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2020-10-13 10:56:24,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 10:56:24,821 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2020-10-13 10:56:24,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 10:56:24,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:24,822 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:24,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 10:56:24,822 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:24,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:24,822 INFO L82 PathProgramCache]: Analyzing trace with hash 861703886, now seen corresponding path program 4 times [2020-10-13 10:56:24,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:24,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140950391] [2020-10-13 10:56:24,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:24,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:24,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:24,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:24,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 10:56:24,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:24,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-13 10:56:24,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:24,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 10:56:24,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 10:56:24,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:56:24,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:25,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:25,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:25,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:25,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:25,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:25,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:25,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:25,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:25,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:25,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:25,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:25,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 10:56:25,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140950391] [2020-10-13 10:56:25,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:25,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 10:56:25,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549241133] [2020-10-13 10:56:25,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 10:56:25,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:25,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 10:56:25,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 10:56:25,052 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand 6 states. [2020-10-13 10:56:25,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:25,108 INFO L93 Difference]: Finished difference Result 75 states and 109 transitions. [2020-10-13 10:56:25,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 10:56:25,109 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-13 10:56:25,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:25,110 INFO L225 Difference]: With dead ends: 75 [2020-10-13 10:56:25,110 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 10:56:25,111 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 [2020-10-13 10:56:25,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 10:56:25,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-13 10:56:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-13 10:56:25,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2020-10-13 10:56:25,116 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 24 [2020-10-13 10:56:25,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:25,116 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2020-10-13 10:56:25,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 10:56:25,117 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2020-10-13 10:56:25,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 10:56:25,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:25,118 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:25,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 10:56:25,118 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:25,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:25,118 INFO L82 PathProgramCache]: Analyzing trace with hash 476914974, now seen corresponding path program 5 times [2020-10-13 10:56:25,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:25,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697554122] [2020-10-13 10:56:25,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:25,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:25,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:25,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:25,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:25,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:26,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:26,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:56:26,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:56:26,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 891 [2020-10-13 10:56:26,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:26,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:56:26,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 10:56:26,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:56:26,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:26,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:26,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:26,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:26,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:26,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:26,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:26,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:26,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:26,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:26,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:26,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 10:56:26,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697554122] [2020-10-13 10:56:26,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:26,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:56:26,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059734066] [2020-10-13 10:56:26,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:56:26,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:26,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:56:26,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:56:26,103 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand 7 states. [2020-10-13 10:56:26,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:26,243 INFO L93 Difference]: Finished difference Result 126 states and 175 transitions. [2020-10-13 10:56:26,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:56:26,244 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-13 10:56:26,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:26,246 INFO L225 Difference]: With dead ends: 126 [2020-10-13 10:56:26,246 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 10:56:26,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:56:26,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 10:56:26,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2020-10-13 10:56:26,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 10:56:26,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 105 transitions. [2020-10-13 10:56:26,269 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 105 transitions. Word has length 25 [2020-10-13 10:56:26,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:26,270 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 105 transitions. [2020-10-13 10:56:26,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:56:26,270 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 105 transitions. [2020-10-13 10:56:26,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 10:56:26,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:26,272 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:26,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 10:56:26,274 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:26,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:26,274 INFO L82 PathProgramCache]: Analyzing trace with hash -2054157634, now seen corresponding path program 6 times [2020-10-13 10:56:26,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:26,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387123158] [2020-10-13 10:56:26,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:26,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:26,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:26,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:26,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:27,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:27,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:29,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:29,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 10:56:29,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:56:29,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2796 [2020-10-13 10:56:29,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:29,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:56:29,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-13 10:56:29,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:56:29,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:29,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:29,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:29,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:29,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:29,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:29,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:29,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:29,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:29,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:29,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:29,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:29,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:29,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 10:56:29,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387123158] [2020-10-13 10:56:29,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:29,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:56:29,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79112260] [2020-10-13 10:56:29,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:56:29,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:29,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:56:29,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:56:29,180 INFO L87 Difference]: Start difference. First operand 77 states and 105 transitions. Second operand 8 states. [2020-10-13 10:56:29,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:29,279 INFO L93 Difference]: Finished difference Result 90 states and 120 transitions. [2020-10-13 10:56:29,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:56:29,280 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-10-13 10:56:29,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:29,281 INFO L225 Difference]: With dead ends: 90 [2020-10-13 10:56:29,281 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 10:56:29,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:56:29,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 10:56:29,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-13 10:56:29,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 10:56:29,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 90 transitions. [2020-10-13 10:56:29,287 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 90 transitions. Word has length 25 [2020-10-13 10:56:29,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:29,288 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 90 transitions. [2020-10-13 10:56:29,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:56:29,288 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 90 transitions. [2020-10-13 10:56:29,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 10:56:29,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:29,291 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:29,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 10:56:29,292 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:29,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:29,292 INFO L82 PathProgramCache]: Analyzing trace with hash 481939021, now seen corresponding path program 7 times [2020-10-13 10:56:29,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:29,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688898602] [2020-10-13 10:56:29,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:29,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:29,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:29,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:29,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:30,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:30,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 10:56:30,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:56:30,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1278 [2020-10-13 10:56:30,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:30,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:56:30,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:56:30,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 10:56:30,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:30,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:30,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:30,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:30,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:30,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:30,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:30,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:30,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:30,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:30,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:30,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 10:56:30,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688898602] [2020-10-13 10:56:30,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:30,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:56:30,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401913259] [2020-10-13 10:56:30,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:56:30,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:30,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:56:30,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:56:30,678 INFO L87 Difference]: Start difference. First operand 65 states and 90 transitions. Second operand 8 states. [2020-10-13 10:56:30,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:30,864 INFO L93 Difference]: Finished difference Result 81 states and 108 transitions. [2020-10-13 10:56:30,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:56:30,865 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-13 10:56:30,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:30,866 INFO L225 Difference]: With dead ends: 81 [2020-10-13 10:56:30,866 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 10:56:30,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:56:30,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 10:56:30,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-10-13 10:56:30,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 10:56:30,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 76 transitions. [2020-10-13 10:56:30,873 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 76 transitions. Word has length 26 [2020-10-13 10:56:30,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:30,874 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 76 transitions. [2020-10-13 10:56:30,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:56:30,874 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 76 transitions. [2020-10-13 10:56:30,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 10:56:30,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:30,876 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:30,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 10:56:30,877 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:30,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:30,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1547913843, now seen corresponding path program 8 times [2020-10-13 10:56:30,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:30,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816055739] [2020-10-13 10:56:30,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:30,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:30,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:30,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:31,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:31,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:31,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:32,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:33,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:33,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 10:56:33,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 10:56:33,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2406 [2020-10-13 10:56:33,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:33,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:56:33,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:56:33,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:56:33,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:33,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:33,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:33,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:33,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:33,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:33,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:33,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:33,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:33,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:33,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:33,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 10:56:33,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816055739] [2020-10-13 10:56:33,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:33,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:56:33,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996119652] [2020-10-13 10:56:33,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:56:33,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:33,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:56:33,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:56:33,394 INFO L87 Difference]: Start difference. First operand 54 states and 76 transitions. Second operand 8 states. [2020-10-13 10:56:33,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:33,682 INFO L93 Difference]: Finished difference Result 67 states and 91 transitions. [2020-10-13 10:56:33,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:56:33,683 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-13 10:56:33,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:33,683 INFO L225 Difference]: With dead ends: 67 [2020-10-13 10:56:33,684 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 10:56:33,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:56:33,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 10:56:33,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-13 10:56:33,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 10:56:33,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2020-10-13 10:56:33,690 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 26 [2020-10-13 10:56:33,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:33,691 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2020-10-13 10:56:33,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:56:33,693 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2020-10-13 10:56:33,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 10:56:33,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:33,694 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:33,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 10:56:33,695 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:33,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:33,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1520326989, now seen corresponding path program 4 times [2020-10-13 10:56:33,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:33,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363710653] [2020-10-13 10:56:33,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:33,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:33,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:33,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:33,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:33,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:34,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:36,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:36,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 10:56:36,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:56:36,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3048 [2020-10-13 10:56:36,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:36,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:56:36,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:56:36,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 10:56:36,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:36,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:36,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:36,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:36,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:36,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:36,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:36,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:36,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:36,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:36,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:36,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 10:56:36,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363710653] [2020-10-13 10:56:36,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:36,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:56:36,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84307050] [2020-10-13 10:56:36,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:56:36,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:36,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:56:36,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:56:36,994 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 10 states. [2020-10-13 10:56:39,172 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2020-10-13 10:56:39,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:39,405 INFO L93 Difference]: Finished difference Result 80 states and 112 transitions. [2020-10-13 10:56:39,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:56:39,407 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-13 10:56:39,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:39,408 INFO L225 Difference]: With dead ends: 80 [2020-10-13 10:56:39,408 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 10:56:39,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:56:39,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 10:56:39,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2020-10-13 10:56:39,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 10:56:39,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2020-10-13 10:56:39,415 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 26 [2020-10-13 10:56:39,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:39,415 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2020-10-13 10:56:39,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:56:39,415 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2020-10-13 10:56:39,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 10:56:39,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:39,416 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:39,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 10:56:39,416 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:39,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:39,417 INFO L82 PathProgramCache]: Analyzing trace with hash -2147382771, now seen corresponding path program 5 times [2020-10-13 10:56:39,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:39,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975706263] [2020-10-13 10:56:39,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:39,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:39,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:39,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:39,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:39,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:41,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:42,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:42,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 10:56:42,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:56:42,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3229 [2020-10-13 10:56:42,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:42,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:56:42,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 10:56:42,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 10:56:42,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:42,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:42,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:42,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:42,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:42,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:42,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:42,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:42,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:42,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:42,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:42,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 10:56:42,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975706263] [2020-10-13 10:56:42,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:42,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:56:42,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575096135] [2020-10-13 10:56:42,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:56:42,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:42,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:56:42,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:56:42,744 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand 7 states. [2020-10-13 10:56:42,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:42,839 INFO L93 Difference]: Finished difference Result 77 states and 107 transitions. [2020-10-13 10:56:42,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:56:42,840 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-10-13 10:56:42,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:42,840 INFO L225 Difference]: With dead ends: 77 [2020-10-13 10:56:42,840 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 10:56:42,841 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 [2020-10-13 10:56:42,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 10:56:42,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2020-10-13 10:56:42,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 10:56:42,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2020-10-13 10:56:42,847 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 26 [2020-10-13 10:56:42,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:42,847 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2020-10-13 10:56:42,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:56:42,847 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2020-10-13 10:56:42,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 10:56:42,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:42,848 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:42,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 10:56:42,848 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:42,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:42,849 INFO L82 PathProgramCache]: Analyzing trace with hash -871535601, now seen corresponding path program 9 times [2020-10-13 10:56:42,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:42,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092871714] [2020-10-13 10:56:42,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:42,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:42,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:43,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:43,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 10:56:43,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:56:43,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-13 10:56:43,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:43,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 10:56:43,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 10:56:43,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:56:43,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:43,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:43,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:43,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:43,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:43,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:43,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:56:43,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:43,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:43,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:43,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:43,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:43,157 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 10:56:43,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092871714] [2020-10-13 10:56:43,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:43,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 10:56:43,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768441788] [2020-10-13 10:56:43,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 10:56:43,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:43,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 10:56:43,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-13 10:56:43,158 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand 7 states. [2020-10-13 10:56:43,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:43,239 INFO L93 Difference]: Finished difference Result 91 states and 123 transitions. [2020-10-13 10:56:43,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 10:56:43,241 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-13 10:56:43,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:43,242 INFO L225 Difference]: With dead ends: 91 [2020-10-13 10:56:43,242 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 10:56:43,242 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 [2020-10-13 10:56:43,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 10:56:43,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-13 10:56:43,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 10:56:43,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 104 transitions. [2020-10-13 10:56:43,249 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 104 transitions. Word has length 28 [2020-10-13 10:56:43,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:43,250 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 104 transitions. [2020-10-13 10:56:43,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 10:56:43,250 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 104 transitions. [2020-10-13 10:56:43,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 10:56:43,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:43,251 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:43,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 10:56:43,251 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:43,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:43,251 INFO L82 PathProgramCache]: Analyzing trace with hash -878893599, now seen corresponding path program 10 times [2020-10-13 10:56:43,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:43,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298076866] [2020-10-13 10:56:43,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:43,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:43,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:43,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:43,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:45,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:45,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:56:45,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:56:45,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1773 [2020-10-13 10:56:45,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:45,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:56:45,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:56:45,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:56:45,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:45,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:45,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:45,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:45,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:45,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:45,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:45,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:45,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:45,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:45,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:45,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:45,145 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 10:56:45,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298076866] [2020-10-13 10:56:45,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:45,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:56:45,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119960116] [2020-10-13 10:56:45,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:56:45,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:45,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:56:45,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:56:45,148 INFO L87 Difference]: Start difference. First operand 79 states and 104 transitions. Second operand 10 states. [2020-10-13 10:56:48,263 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 21 [2020-10-13 10:56:48,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:48,487 INFO L93 Difference]: Finished difference Result 101 states and 129 transitions. [2020-10-13 10:56:48,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 10:56:48,488 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-10-13 10:56:48,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:48,488 INFO L225 Difference]: With dead ends: 101 [2020-10-13 10:56:48,488 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 10:56:48,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2020-10-13 10:56:48,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 10:56:48,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 67. [2020-10-13 10:56:48,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 10:56:48,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2020-10-13 10:56:48,505 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 29 [2020-10-13 10:56:48,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:48,506 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2020-10-13 10:56:48,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:56:48,506 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2020-10-13 10:56:48,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 10:56:48,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:48,509 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:48,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 10:56:48,509 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:48,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:48,510 INFO L82 PathProgramCache]: Analyzing trace with hash -763096147, now seen corresponding path program 5 times [2020-10-13 10:56:48,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:48,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135986306] [2020-10-13 10:56:48,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:48,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:48,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:48,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:48,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:48,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:48,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:51,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:51,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 10:56:51,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:56:51,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2742 [2020-10-13 10:56:51,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:51,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:56:51,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 10:56:51,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:56:51,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:51,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:51,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:51,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:51,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:51,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:51,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:51,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:51,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:51,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:51,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:51,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-13 10:56:51,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135986306] [2020-10-13 10:56:51,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:51,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:56:51,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755355450] [2020-10-13 10:56:51,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:56:51,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:51,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:56:51,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:56:51,358 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand 8 states. [2020-10-13 10:56:51,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:51,490 INFO L93 Difference]: Finished difference Result 92 states and 125 transitions. [2020-10-13 10:56:51,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:56:51,491 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-13 10:56:51,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:51,492 INFO L225 Difference]: With dead ends: 92 [2020-10-13 10:56:51,493 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 10:56:51,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:56:51,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 10:56:51,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 72. [2020-10-13 10:56:51,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 10:56:51,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2020-10-13 10:56:51,501 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 29 [2020-10-13 10:56:51,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:51,501 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2020-10-13 10:56:51,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:56:51,502 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2020-10-13 10:56:51,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:56:51,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:51,502 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:51,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 10:56:51,503 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:51,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:51,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1699936783, now seen corresponding path program 11 times [2020-10-13 10:56:51,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:51,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159197196] [2020-10-13 10:56:51,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:51,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:51,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:51,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:51,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:52,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:52,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:56:52,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:56:52,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 814 [2020-10-13 10:56:52,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:52,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:56:52,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 10:56:52,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:56:52,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:52,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:52,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:52,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:52,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:52,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:52,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:56:52,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:52,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:52,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:52,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:52,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 10:56:52,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159197196] [2020-10-13 10:56:52,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:52,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:56:52,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148180581] [2020-10-13 10:56:52,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:56:52,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:52,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:56:52,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:56:52,423 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand 8 states. [2020-10-13 10:56:52,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:52,593 INFO L93 Difference]: Finished difference Result 110 states and 141 transitions. [2020-10-13 10:56:52,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:56:52,595 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-13 10:56:52,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:52,596 INFO L225 Difference]: With dead ends: 110 [2020-10-13 10:56:52,596 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 10:56:52,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:56:52,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 10:56:52,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 63. [2020-10-13 10:56:52,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 10:56:52,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 86 transitions. [2020-10-13 10:56:52,603 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 86 transitions. Word has length 30 [2020-10-13 10:56:52,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:52,603 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 86 transitions. [2020-10-13 10:56:52,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:56:52,603 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 86 transitions. [2020-10-13 10:56:52,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 10:56:52,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:52,604 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:52,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 10:56:52,604 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:52,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:52,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1244417394, now seen corresponding path program 6 times [2020-10-13 10:56:52,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:52,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360196752] [2020-10-13 10:56:52,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:52,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:52,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:52,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:52,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:52,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:52,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:53,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:57,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:57,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 10:56:57,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:56:57,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 10:56:57,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:57,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:56:57,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:56:57,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:56:57,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:57,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:56:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:57,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:57,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:57,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:56:57,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:56:57,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:56:57,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:57,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:56:57,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:56:57,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:56:57,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:56:57,792 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 10:56:57,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360196752] [2020-10-13 10:56:57,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:56:57,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:56:57,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286127155] [2020-10-13 10:56:57,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:56:57,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:56:57,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:56:57,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:56:57,794 INFO L87 Difference]: Start difference. First operand 63 states and 86 transitions. Second operand 12 states. [2020-10-13 10:56:58,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:56:58,264 INFO L93 Difference]: Finished difference Result 141 states and 196 transitions. [2020-10-13 10:56:58,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:56:58,266 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2020-10-13 10:56:58,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:56:58,268 INFO L225 Difference]: With dead ends: 141 [2020-10-13 10:56:58,268 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 10:56:58,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-10-13 10:56:58,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 10:56:58,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 66. [2020-10-13 10:56:58,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 10:56:58,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 87 transitions. [2020-10-13 10:56:58,275 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 87 transitions. Word has length 30 [2020-10-13 10:56:58,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:56:58,275 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 87 transitions. [2020-10-13 10:56:58,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:56:58,275 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 87 transitions. [2020-10-13 10:56:58,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-13 10:56:58,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:56:58,275 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:56:58,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 10:56:58,276 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:56:58,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:56:58,276 INFO L82 PathProgramCache]: Analyzing trace with hash -200109537, now seen corresponding path program 6 times [2020-10-13 10:56:58,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:56:58,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635246862] [2020-10-13 10:56:58,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:56:58,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:56:58,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:58,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:58,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:58,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:56:59,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:56:59,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-13 10:56:59,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:56:59,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1654 [2020-10-13 10:56:59,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:56:59,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:56:59,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 10:56:59,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 10:56:59,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:00,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:00,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:00,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:00,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:00,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:00,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:00,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:00,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:00,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:00,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:00,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:00,060 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 10:57:00,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635246862] [2020-10-13 10:57:00,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:00,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:57:00,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066115651] [2020-10-13 10:57:00,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:57:00,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:00,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:57:00,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:57:00,062 INFO L87 Difference]: Start difference. First operand 66 states and 87 transitions. Second operand 9 states. [2020-10-13 10:57:02,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:02,275 INFO L93 Difference]: Finished difference Result 76 states and 99 transitions. [2020-10-13 10:57:02,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:57:02,275 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-13 10:57:02,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:02,276 INFO L225 Difference]: With dead ends: 76 [2020-10-13 10:57:02,276 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 10:57:02,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:57:02,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 10:57:02,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2020-10-13 10:57:02,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 10:57:02,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2020-10-13 10:57:02,284 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 31 [2020-10-13 10:57:02,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:02,285 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2020-10-13 10:57:02,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:57:02,285 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2020-10-13 10:57:02,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:57:02,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:02,285 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:02,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 10:57:02,285 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:02,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:02,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1316094702, now seen corresponding path program 12 times [2020-10-13 10:57:02,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:02,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023057713] [2020-10-13 10:57:02,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:02,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:02,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:02,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:02,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:57:02,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:57:02,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-13 10:57:02,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:02,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 10:57:02,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 10:57:02,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:57:02,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:02,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:02,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:02,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:02,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:02,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:02,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:02,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:02,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:02,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:02,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:02,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:02,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 10:57:02,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023057713] [2020-10-13 10:57:02,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:02,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 10:57:02,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866891215] [2020-10-13 10:57:02,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 10:57:02,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:02,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 10:57:02,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 10:57:02,671 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand 8 states. [2020-10-13 10:57:02,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:02,786 INFO L93 Difference]: Finished difference Result 96 states and 129 transitions. [2020-10-13 10:57:02,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 10:57:02,787 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-13 10:57:02,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:02,788 INFO L225 Difference]: With dead ends: 96 [2020-10-13 10:57:02,788 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 10:57:02,789 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 [2020-10-13 10:57:02,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 10:57:02,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-13 10:57:02,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 10:57:02,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 107 transitions. [2020-10-13 10:57:02,796 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 107 transitions. Word has length 32 [2020-10-13 10:57:02,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:02,796 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 107 transitions. [2020-10-13 10:57:02,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 10:57:02,796 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 107 transitions. [2020-10-13 10:57:02,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 10:57:02,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:02,797 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:02,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 10:57:02,797 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:02,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:02,798 INFO L82 PathProgramCache]: Analyzing trace with hash -433694259, now seen corresponding path program 7 times [2020-10-13 10:57:02,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:02,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038237140] [2020-10-13 10:57:02,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:02,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:02,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:02,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:03,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:03,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:03,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:06,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:06,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 10:57:06,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:57:06,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4167 [2020-10-13 10:57:06,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:06,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:57:06,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 10:57:06,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 10:57:06,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:07,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:07,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:07,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:07,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:07,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:07,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:07,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:07,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:07,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:07,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:07,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-13 10:57:07,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038237140] [2020-10-13 10:57:07,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:07,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:57:07,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244217032] [2020-10-13 10:57:07,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:57:07,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:07,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:57:07,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:57:07,095 INFO L87 Difference]: Start difference. First operand 82 states and 107 transitions. Second operand 9 states. [2020-10-13 10:57:07,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:07,288 INFO L93 Difference]: Finished difference Result 110 states and 151 transitions. [2020-10-13 10:57:07,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:57:07,288 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-10-13 10:57:07,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:07,289 INFO L225 Difference]: With dead ends: 110 [2020-10-13 10:57:07,289 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 10:57:07,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:57:07,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 10:57:07,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2020-10-13 10:57:07,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 10:57:07,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 114 transitions. [2020-10-13 10:57:07,298 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 114 transitions. Word has length 32 [2020-10-13 10:57:07,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:07,299 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 114 transitions. [2020-10-13 10:57:07,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:57:07,299 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 114 transitions. [2020-10-13 10:57:07,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 10:57:07,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:07,300 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:07,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 10:57:07,300 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:07,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:07,300 INFO L82 PathProgramCache]: Analyzing trace with hash 377106542, now seen corresponding path program 8 times [2020-10-13 10:57:07,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:07,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324213730] [2020-10-13 10:57:07,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:07,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:07,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:07,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:07,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:08,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:08,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:12,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:12,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 10:57:12,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:57:12,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 10:57:12,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:12,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:57:12,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 10:57:12,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:57:12,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:12,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:12,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:12,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:12,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:12,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:12,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:12,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:12,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:12,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:12,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:12,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:12,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:12,457 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-13 10:57:12,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324213730] [2020-10-13 10:57:12,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:12,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:57:12,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927915583] [2020-10-13 10:57:12,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:57:12,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:12,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:57:12,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:57:12,459 INFO L87 Difference]: Start difference. First operand 86 states and 114 transitions. Second operand 10 states. [2020-10-13 10:57:12,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:12,661 INFO L93 Difference]: Finished difference Result 118 states and 166 transitions. [2020-10-13 10:57:12,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:57:12,662 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-13 10:57:12,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:12,664 INFO L225 Difference]: With dead ends: 118 [2020-10-13 10:57:12,664 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 10:57:12,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:57:12,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 10:57:12,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2020-10-13 10:57:12,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 10:57:12,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 122 transitions. [2020-10-13 10:57:12,671 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 122 transitions. Word has length 33 [2020-10-13 10:57:12,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:12,671 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 122 transitions. [2020-10-13 10:57:12,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:57:12,672 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 122 transitions. [2020-10-13 10:57:12,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:57:12,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:12,672 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:12,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 10:57:12,673 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:12,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:12,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1263020435, now seen corresponding path program 13 times [2020-10-13 10:57:12,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:12,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478221351] [2020-10-13 10:57:12,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:12,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:12,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:12,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:13,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:16,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:16,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:57:16,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:57:16,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3764 [2020-10-13 10:57:16,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:16,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:57:16,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 10:57:16,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 10:57:16,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:16,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:16,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:16,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:16,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:16,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:16,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:16,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:16,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:16,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:16,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:16,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-13 10:57:16,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478221351] [2020-10-13 10:57:16,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:16,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:57:16,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579808795] [2020-10-13 10:57:16,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:57:16,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:16,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:57:16,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:57:16,640 INFO L87 Difference]: Start difference. First operand 91 states and 122 transitions. Second operand 12 states. [2020-10-13 10:57:18,534 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2020-10-13 10:57:19,877 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 24 DAG size of output: 18 [2020-10-13 10:57:22,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:22,167 INFO L93 Difference]: Finished difference Result 141 states and 183 transitions. [2020-10-13 10:57:22,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 10:57:22,172 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-10-13 10:57:22,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:22,173 INFO L225 Difference]: With dead ends: 141 [2020-10-13 10:57:22,173 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 10:57:22,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-10-13 10:57:22,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 10:57:22,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 89. [2020-10-13 10:57:22,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-13 10:57:22,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 117 transitions. [2020-10-13 10:57:22,182 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 117 transitions. Word has length 34 [2020-10-13 10:57:22,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:22,182 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 117 transitions. [2020-10-13 10:57:22,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:57:22,182 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 117 transitions. [2020-10-13 10:57:22,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 10:57:22,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:22,183 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:22,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 10:57:22,183 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:22,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:22,183 INFO L82 PathProgramCache]: Analyzing trace with hash -257872403, now seen corresponding path program 9 times [2020-10-13 10:57:22,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:22,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103357345] [2020-10-13 10:57:22,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:22,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:22,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:22,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:22,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:22,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:23,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:27,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:27,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 10:57:27,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:57:27,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 10:57:27,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:27,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:57:27,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 10:57:27,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:57:27,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:27,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:27,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:27,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:27,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:27,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:27,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:27,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:27,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:27,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:27,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:27,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:27,371 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-13 10:57:27,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103357345] [2020-10-13 10:57:27,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:27,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:57:27,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313818405] [2020-10-13 10:57:27,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:57:27,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:27,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:57:27,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:57:27,373 INFO L87 Difference]: Start difference. First operand 89 states and 117 transitions. Second operand 11 states. [2020-10-13 10:57:27,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:27,638 INFO L93 Difference]: Finished difference Result 122 states and 171 transitions. [2020-10-13 10:57:27,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:57:27,639 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-10-13 10:57:27,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:27,639 INFO L225 Difference]: With dead ends: 122 [2020-10-13 10:57:27,640 INFO L226 Difference]: Without dead ends: 116 [2020-10-13 10:57:27,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:57:27,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-13 10:57:27,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 94. [2020-10-13 10:57:27,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 10:57:27,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2020-10-13 10:57:27,648 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 125 transitions. Word has length 34 [2020-10-13 10:57:27,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:27,648 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 125 transitions. [2020-10-13 10:57:27,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:57:27,648 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 125 transitions. [2020-10-13 10:57:27,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:57:27,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:27,649 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:27,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 10:57:27,649 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:27,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:27,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1210303682, now seen corresponding path program 14 times [2020-10-13 10:57:27,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:27,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162142831] [2020-10-13 10:57:27,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:27,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:27,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:27,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:28,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:29,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:29,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:57:29,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:57:29,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1384 [2020-10-13 10:57:29,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:29,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:57:29,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 10:57:29,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:57:29,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:29,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:29,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:29,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:29,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:29,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:29,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:57:29,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:29,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:29,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:29,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:29,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:29,169 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 10:57:29,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162142831] [2020-10-13 10:57:29,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:29,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:57:29,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324841607] [2020-10-13 10:57:29,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:57:29,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:29,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:57:29,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:57:29,171 INFO L87 Difference]: Start difference. First operand 94 states and 125 transitions. Second operand 9 states. [2020-10-13 10:57:29,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:29,364 INFO L93 Difference]: Finished difference Result 162 states and 214 transitions. [2020-10-13 10:57:29,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:57:29,365 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-13 10:57:29,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:29,366 INFO L225 Difference]: With dead ends: 162 [2020-10-13 10:57:29,366 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 10:57:29,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:57:29,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 10:57:29,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 82. [2020-10-13 10:57:29,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 10:57:29,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 114 transitions. [2020-10-13 10:57:29,374 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 114 transitions. Word has length 35 [2020-10-13 10:57:29,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:29,374 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 114 transitions. [2020-10-13 10:57:29,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:57:29,374 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 114 transitions. [2020-10-13 10:57:29,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 10:57:29,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:29,375 INFO L422 BasicCegarLoop]: trace histogram [9, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:29,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 10:57:29,376 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:29,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:29,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1532616782, now seen corresponding path program 10 times [2020-10-13 10:57:29,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:29,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138204287] [2020-10-13 10:57:29,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:29,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:29,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:29,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:29,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:29,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:29,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:31,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:34,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:34,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 10:57:34,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:57:34,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 10:57:34,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:34,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:57:34,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 10:57:34,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 10:57:34,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:34,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:34,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:34,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:34,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:34,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:34,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:34,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:34,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:34,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:34,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:34,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:34,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:34,630 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 10:57:34,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138204287] [2020-10-13 10:57:34,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:34,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:57:34,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467826951] [2020-10-13 10:57:34,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:57:34,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:34,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:57:34,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:57:34,632 INFO L87 Difference]: Start difference. First operand 82 states and 114 transitions. Second operand 14 states. [2020-10-13 10:57:35,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:35,291 INFO L93 Difference]: Finished difference Result 206 states and 291 transitions. [2020-10-13 10:57:35,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 10:57:35,292 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-10-13 10:57:35,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:35,293 INFO L225 Difference]: With dead ends: 206 [2020-10-13 10:57:35,293 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 10:57:35,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2020-10-13 10:57:35,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 10:57:35,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 82. [2020-10-13 10:57:35,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 10:57:35,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 110 transitions. [2020-10-13 10:57:35,305 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 110 transitions. Word has length 35 [2020-10-13 10:57:35,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:35,305 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 110 transitions. [2020-10-13 10:57:35,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:57:35,306 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 110 transitions. [2020-10-13 10:57:35,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 10:57:35,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:35,306 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:35,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 10:57:35,307 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:35,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:35,307 INFO L82 PathProgramCache]: Analyzing trace with hash -792800145, now seen corresponding path program 15 times [2020-10-13 10:57:35,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:35,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420002321] [2020-10-13 10:57:35,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:35,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:35,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:35,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:35,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 10:57:35,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:57:35,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-10-13 10:57:35,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:35,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 10:57:35,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:57:35,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:57:35,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:35,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:35,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:35,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:35,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:35,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:35,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:35,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:57:35,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:35,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:35,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:35,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:35,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-13 10:57:35,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420002321] [2020-10-13 10:57:35,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:35,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 10:57:35,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632255876] [2020-10-13 10:57:35,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 10:57:35,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:35,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 10:57:35,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-13 10:57:35,798 INFO L87 Difference]: Start difference. First operand 82 states and 110 transitions. Second operand 9 states. [2020-10-13 10:57:35,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:35,954 INFO L93 Difference]: Finished difference Result 119 states and 164 transitions. [2020-10-13 10:57:35,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 10:57:35,960 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-13 10:57:35,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:35,961 INFO L225 Difference]: With dead ends: 119 [2020-10-13 10:57:35,961 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 10:57:35,961 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 [2020-10-13 10:57:35,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 10:57:35,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-13 10:57:35,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-13 10:57:35,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 137 transitions. [2020-10-13 10:57:35,973 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 137 transitions. Word has length 36 [2020-10-13 10:57:35,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:35,973 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 137 transitions. [2020-10-13 10:57:35,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 10:57:35,973 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 137 transitions. [2020-10-13 10:57:35,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 10:57:35,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:35,974 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:35,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 10:57:35,974 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:35,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:35,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1502769203, now seen corresponding path program 11 times [2020-10-13 10:57:35,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:35,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753006316] [2020-10-13 10:57:35,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:35,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:36,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:36,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:36,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:36,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:37,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:40,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:40,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 10:57:40,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:57:40,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:57:40,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:40,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 10:57:40,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:57:40,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:57:40,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:41,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:41,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:41,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:41,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:41,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:41,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:57:41,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:41,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:41,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:41,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:41,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:57:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-10-13 10:57:41,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753006316] [2020-10-13 10:57:41,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:41,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 10:57:41,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199049046] [2020-10-13 10:57:41,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 10:57:41,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:41,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 10:57:41,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:57:41,346 INFO L87 Difference]: Start difference. First operand 103 states and 137 transitions. Second operand 12 states. [2020-10-13 10:57:41,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:57:41,840 INFO L93 Difference]: Finished difference Result 143 states and 204 transitions. [2020-10-13 10:57:41,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 10:57:41,841 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2020-10-13 10:57:41,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:57:41,843 INFO L225 Difference]: With dead ends: 143 [2020-10-13 10:57:41,843 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 10:57:41,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:57:41,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 10:57:41,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 108. [2020-10-13 10:57:41,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-13 10:57:41,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 145 transitions. [2020-10-13 10:57:41,876 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 145 transitions. Word has length 37 [2020-10-13 10:57:41,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:57:41,877 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 145 transitions. [2020-10-13 10:57:41,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 10:57:41,879 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 145 transitions. [2020-10-13 10:57:41,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:57:41,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:57:41,880 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:57:41,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 10:57:41,884 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:57:41,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:57:41,885 INFO L82 PathProgramCache]: Analyzing trace with hash -400485168, now seen corresponding path program 16 times [2020-10-13 10:57:41,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:57:41,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712235667] [2020-10-13 10:57:41,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:57:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:41,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:41,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:42,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:42,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:46,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:46,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:57:46,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:57:46,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 10:57:46,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:46,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:57:46,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 10:57:46,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 10:57:46,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:57:47,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:57:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:57:47,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:57:47,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:57:47,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:57:47,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:57:47,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 10:57:47,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:57:47,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:57:47,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:57:47,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:57:47,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:57:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-13 10:57:47,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712235667] [2020-10-13 10:57:47,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:57:47,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:57:47,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664786471] [2020-10-13 10:57:47,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:57:47,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:57:47,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:57:47,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:57:47,255 INFO L87 Difference]: Start difference. First operand 108 states and 145 transitions. Second operand 14 states. [2020-10-13 10:57:49,743 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 37 [2020-10-13 10:57:52,289 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-10-13 10:57:58,177 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-10-13 10:57:59,830 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-10-13 10:58:02,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:58:02,670 INFO L93 Difference]: Finished difference Result 225 states and 287 transitions. [2020-10-13 10:58:02,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 10:58:02,670 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-13 10:58:02,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:58:02,672 INFO L225 Difference]: With dead ends: 225 [2020-10-13 10:58:02,672 INFO L226 Difference]: Without dead ends: 212 [2020-10-13 10:58:02,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=234, Invalid=1026, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 10:58:02,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-13 10:58:02,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 106. [2020-10-13 10:58:02,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 10:58:02,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 140 transitions. [2020-10-13 10:58:02,684 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 140 transitions. Word has length 38 [2020-10-13 10:58:02,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:58:02,684 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 140 transitions. [2020-10-13 10:58:02,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:58:02,684 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 140 transitions. [2020-10-13 10:58:02,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 10:58:02,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:58:02,688 INFO L422 BasicCegarLoop]: trace histogram [10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:58:02,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 10:58:02,689 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:58:02,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:58:02,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1595521646, now seen corresponding path program 12 times [2020-10-13 10:58:02,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:58:02,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534033398] [2020-10-13 10:58:02,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:58:02,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:02,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:02,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:02,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:03,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:03,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:04,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:07,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:07,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 10:58:07,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:58:07,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 10:58:07,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:07,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 10:58:07,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 10:58:07,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:58:07,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:07,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:07,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:07,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:07,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:58:07,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:07,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:58:07,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:07,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:07,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:07,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:07,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-10-13 10:58:07,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534033398] [2020-10-13 10:58:07,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:07,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 10:58:07,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991066052] [2020-10-13 10:58:07,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 10:58:07,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:07,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 10:58:07,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:58:07,986 INFO L87 Difference]: Start difference. First operand 106 states and 140 transitions. Second operand 13 states. [2020-10-13 10:58:08,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:58:08,356 INFO L93 Difference]: Finished difference Result 147 states and 209 transitions. [2020-10-13 10:58:08,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 10:58:08,357 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-13 10:58:08,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:58:08,358 INFO L225 Difference]: With dead ends: 147 [2020-10-13 10:58:08,358 INFO L226 Difference]: Without dead ends: 141 [2020-10-13 10:58:08,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-13 10:58:08,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-13 10:58:08,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 111. [2020-10-13 10:58:08,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 10:58:08,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 148 transitions. [2020-10-13 10:58:08,368 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 148 transitions. Word has length 38 [2020-10-13 10:58:08,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:58:08,369 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 148 transitions. [2020-10-13 10:58:08,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 10:58:08,369 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 148 transitions. [2020-10-13 10:58:08,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 10:58:08,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:58:08,370 INFO L422 BasicCegarLoop]: trace histogram [11, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:58:08,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 10:58:08,370 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:58:08,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:58:08,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1141709843, now seen corresponding path program 13 times [2020-10-13 10:58:08,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:58:08,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619671933] [2020-10-13 10:58:08,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:58:08,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:08,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:08,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:08,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:08,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:09,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:10,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:13,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:13,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 10:58:13,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 10:58:13,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 10:58:13,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:13,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:58:13,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 10:58:13,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 10:58:13,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:13,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:13,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:13,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:13,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:13,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:58:13,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:13,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:58:13,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:13,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:13,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:13,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:13,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 35 proven. 42 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-13 10:58:13,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619671933] [2020-10-13 10:58:13,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:13,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:58:13,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082325591] [2020-10-13 10:58:13,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:58:13,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:13,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:58:13,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:58:13,714 INFO L87 Difference]: Start difference. First operand 111 states and 148 transitions. Second operand 16 states. [2020-10-13 10:58:14,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:58:14,901 INFO L93 Difference]: Finished difference Result 284 states and 390 transitions. [2020-10-13 10:58:14,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 10:58:14,902 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 39 [2020-10-13 10:58:14,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:58:14,903 INFO L225 Difference]: With dead ends: 284 [2020-10-13 10:58:14,903 INFO L226 Difference]: Without dead ends: 208 [2020-10-13 10:58:14,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 10:58:14,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-13 10:58:14,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 110. [2020-10-13 10:58:14,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 10:58:14,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 142 transitions. [2020-10-13 10:58:14,915 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 142 transitions. Word has length 39 [2020-10-13 10:58:14,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:58:14,915 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 142 transitions. [2020-10-13 10:58:14,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:58:14,915 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 142 transitions. [2020-10-13 10:58:14,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 10:58:14,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:58:14,916 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:58:14,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 10:58:14,916 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:58:14,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:58:14,917 INFO L82 PathProgramCache]: Analyzing trace with hash -2049757073, now seen corresponding path program 17 times [2020-10-13 10:58:14,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:58:14,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39533176] [2020-10-13 10:58:14,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:58:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:14,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:14,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:15,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:17,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:18,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:18,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 10:58:18,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:58:18,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3524 [2020-10-13 10:58:18,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:18,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:58:18,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 10:58:18,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:58:18,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:18,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:18,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:18,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:18,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:58:18,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:18,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 10:58:18,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:18,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:18,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:18,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:18,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:58:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-13 10:58:18,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39533176] [2020-10-13 10:58:18,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:18,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:58:18,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103472487] [2020-10-13 10:58:18,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:58:18,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:18,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:58:18,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:58:18,632 INFO L87 Difference]: Start difference. First operand 110 states and 142 transitions. Second operand 10 states. [2020-10-13 10:58:19,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:58:19,097 INFO L93 Difference]: Finished difference Result 205 states and 268 transitions. [2020-10-13 10:58:19,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:58:19,098 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-13 10:58:19,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:58:19,099 INFO L225 Difference]: With dead ends: 205 [2020-10-13 10:58:19,100 INFO L226 Difference]: Without dead ends: 169 [2020-10-13 10:58:19,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:58:19,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-13 10:58:19,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 95. [2020-10-13 10:58:19,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 10:58:19,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 128 transitions. [2020-10-13 10:58:19,110 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 128 transitions. Word has length 40 [2020-10-13 10:58:19,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:58:19,110 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 128 transitions. [2020-10-13 10:58:19,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:58:19,110 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 128 transitions. [2020-10-13 10:58:19,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 10:58:19,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:58:19,117 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:58:19,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 10:58:19,117 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:58:19,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:58:19,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1550569230, now seen corresponding path program 18 times [2020-10-13 10:58:19,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:58:19,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055394442] [2020-10-13 10:58:19,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:58:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:19,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:19,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:19,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:19,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 10:58:19,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:58:19,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 681 [2020-10-13 10:58:19,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:19,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 10:58:19,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 10:58:19,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:58:19,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:20,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:20,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:20,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:20,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:58:20,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:20,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:58:20,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:20,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:20,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:20,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:20,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:58:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-13 10:58:20,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055394442] [2020-10-13 10:58:20,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:20,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 10:58:20,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488687957] [2020-10-13 10:58:20,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 10:58:20,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:20,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 10:58:20,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-13 10:58:20,047 INFO L87 Difference]: Start difference. First operand 95 states and 128 transitions. Second operand 10 states. [2020-10-13 10:58:20,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:58:20,287 INFO L93 Difference]: Finished difference Result 138 states and 191 transitions. [2020-10-13 10:58:20,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 10:58:20,288 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-13 10:58:20,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:58:20,289 INFO L225 Difference]: With dead ends: 138 [2020-10-13 10:58:20,289 INFO L226 Difference]: Without dead ends: 120 [2020-10-13 10:58:20,291 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 [2020-10-13 10:58:20,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-13 10:58:20,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-10-13 10:58:20,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 10:58:20,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 160 transitions. [2020-10-13 10:58:20,303 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 160 transitions. Word has length 40 [2020-10-13 10:58:20,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:58:20,307 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 160 transitions. [2020-10-13 10:58:20,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 10:58:20,307 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 160 transitions. [2020-10-13 10:58:20,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 10:58:20,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:58:20,308 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:58:20,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 10:58:20,308 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:58:20,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:58:20,309 INFO L82 PathProgramCache]: Analyzing trace with hash -690655282, now seen corresponding path program 14 times [2020-10-13 10:58:20,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:58:20,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827816582] [2020-10-13 10:58:20,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:58:20,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:20,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:20,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:20,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:20,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:21,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:25,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:25,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 10:58:25,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:58:25,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 10:58:25,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:25,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 10:58:25,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 10:58:25,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:58:25,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:25,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:25,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:25,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:25,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:58:25,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:25,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:58:25,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:25,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:25,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:25,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:25,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-13 10:58:25,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827816582] [2020-10-13 10:58:25,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:25,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 10:58:25,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140957738] [2020-10-13 10:58:25,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 10:58:25,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:25,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 10:58:25,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:58:25,606 INFO L87 Difference]: Start difference. First operand 120 states and 160 transitions. Second operand 14 states. [2020-10-13 10:58:26,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:58:26,071 INFO L93 Difference]: Finished difference Result 169 states and 244 transitions. [2020-10-13 10:58:26,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 10:58:26,072 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-13 10:58:26,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:58:26,073 INFO L225 Difference]: With dead ends: 169 [2020-10-13 10:58:26,073 INFO L226 Difference]: Without dead ends: 163 [2020-10-13 10:58:26,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-13 10:58:26,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-13 10:58:26,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 125. [2020-10-13 10:58:26,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-13 10:58:26,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 168 transitions. [2020-10-13 10:58:26,084 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 168 transitions. Word has length 41 [2020-10-13 10:58:26,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:58:26,084 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 168 transitions. [2020-10-13 10:58:26,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 10:58:26,084 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 168 transitions. [2020-10-13 10:58:26,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 10:58:26,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:58:26,085 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:58:26,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 10:58:26,085 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:58:26,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:58:26,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1646608563, now seen corresponding path program 19 times [2020-10-13 10:58:26,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:58:26,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955563557] [2020-10-13 10:58:26,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:58:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:26,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:26,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:26,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:27,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:31,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:31,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 10:58:31,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:58:31,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 10:58:31,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:31,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:58:31,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 10:58:31,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 10:58:31,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:31,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:58:31,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:58:31,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:58:31,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:58:31,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:58:31,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:58:31,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:58:31,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:58:31,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:58:31,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:58:31,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:58:31,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:58:31,413 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-13 10:58:31,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955563557] [2020-10-13 10:58:31,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:58:31,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:58:31,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247834073] [2020-10-13 10:58:31,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:58:31,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:58:31,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:58:31,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:58:31,414 INFO L87 Difference]: Start difference. First operand 125 states and 168 transitions. Second operand 16 states. [2020-10-13 10:58:34,603 WARN L193 SmtUtils]: Spent 984.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-10-13 10:58:38,315 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-10-13 10:58:39,932 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 48 [2020-10-13 10:58:42,311 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-10-13 10:58:44,338 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 51 [2020-10-13 10:58:52,059 WARN L193 SmtUtils]: Spent 2.40 s on a formula simplification that was a NOOP. DAG size: 44 [2020-10-13 10:58:54,105 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-10-13 10:59:01,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:01,515 INFO L93 Difference]: Finished difference Result 312 states and 394 transitions. [2020-10-13 10:59:01,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 10:59:01,515 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-10-13 10:59:01,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:01,517 INFO L225 Difference]: With dead ends: 312 [2020-10-13 10:59:01,517 INFO L226 Difference]: Without dead ends: 298 [2020-10-13 10:59:01,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=369, Invalid=1697, Unknown=4, NotChecked=0, Total=2070 [2020-10-13 10:59:01,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-10-13 10:59:01,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 123. [2020-10-13 10:59:01,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-13 10:59:01,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 163 transitions. [2020-10-13 10:59:01,531 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 163 transitions. Word has length 42 [2020-10-13 10:59:01,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:01,531 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 163 transitions. [2020-10-13 10:59:01,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:59:01,531 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 163 transitions. [2020-10-13 10:59:01,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 10:59:01,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:01,532 INFO L422 BasicCegarLoop]: trace histogram [12, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:01,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 10:59:01,532 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:01,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:01,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1001249421, now seen corresponding path program 15 times [2020-10-13 10:59:01,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:01,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1799425995] [2020-10-13 10:59:01,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:01,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:01,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:01,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:01,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:02,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:05,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:06,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:06,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 10:59:06,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:59:06,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 10:59:06,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:06,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 10:59:06,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 10:59:06,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:59:06,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:06,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:06,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:06,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:06,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:06,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:06,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:06,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:06,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:06,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:06,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:06,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:06,880 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-13 10:59:06,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1799425995] [2020-10-13 10:59:06,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:06,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 10:59:06,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439647638] [2020-10-13 10:59:06,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 10:59:06,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:06,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 10:59:06,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:59:06,881 INFO L87 Difference]: Start difference. First operand 123 states and 163 transitions. Second operand 15 states. [2020-10-13 10:59:07,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:07,373 INFO L93 Difference]: Finished difference Result 173 states and 249 transitions. [2020-10-13 10:59:07,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 10:59:07,374 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-10-13 10:59:07,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:07,375 INFO L225 Difference]: With dead ends: 173 [2020-10-13 10:59:07,376 INFO L226 Difference]: Without dead ends: 167 [2020-10-13 10:59:07,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-13 10:59:07,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-13 10:59:07,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 128. [2020-10-13 10:59:07,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 10:59:07,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 171 transitions. [2020-10-13 10:59:07,387 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 171 transitions. Word has length 42 [2020-10-13 10:59:07,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:07,387 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 171 transitions. [2020-10-13 10:59:07,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 10:59:07,387 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 171 transitions. [2020-10-13 10:59:07,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 10:59:07,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:07,388 INFO L422 BasicCegarLoop]: trace histogram [13, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:07,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 10:59:07,388 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:07,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:07,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1910687662, now seen corresponding path program 16 times [2020-10-13 10:59:07,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:07,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011357554] [2020-10-13 10:59:07,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:07,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:07,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:07,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:07,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:08,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:08,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:12,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:12,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 10:59:12,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:59:12,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 10:59:12,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:12,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:59:12,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 10:59:12,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:59:12,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:13,073 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2020-10-13 10:59:15,309 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2020-10-13 10:59:17,868 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse8 (div c_main_~y~0 4294967296))) (let ((.cse1 (* c_main_~y~0 8589934592)) (.cse2 (* .cse8 (- 18446744073709551616)))) (let ((.cse0 (* .cse8 (- 4294967296))) (.cse7 (* (div (+ .cse1 .cse2 (- 8589934593)) 18446744073709551616) 4294967296))) (let ((.cse3 (<= (+ (* 4294967296 (div (+ c_main_~y~0 .cse0 .cse7) 4294967296)) 5) c_main_~y~0)) (.cse5 (* c_main_~y~0 (- 1))) (.cse6 (* .cse8 4294967296))) (or (<= (+ (* 4294967296 (div (+ c_main_~y~0 .cse0 (* (div (+ .cse1 .cse2 18446744065119617023) 18446744073709551616) 4294967296)) 4294967296)) 5) c_main_~y~0) (and (<= (+ (* 4294967296 (div (+ c_main_~y~0 4294967289) 4294967296)) 6) c_main_~y~0) (or .cse3 (let ((.cse4 (* (div (+ .cse1 .cse2 (- 18446744082299486209)) 18446744073709551616) 4294967296))) (and (<= (+ (* 4294967296 (div (+ c_main_~y~0 .cse4 .cse0) 4294967296)) 5) c_main_~y~0) (<= c_main_~y~0 (+ (* 4294967296 (div (+ .cse5 .cse4 .cse6 4294967300) 4294967296)) 4294967294)))))) (and .cse3 (<= c_main_~y~0 (+ (* 4294967296 (div (+ .cse5 .cse6 .cse7 4) 4294967296)) 4294967294))) (<= (+ (* 4294967296 .cse8) 4294967296) c_main_~y~0)))))) is different from false [2020-10-13 10:59:23,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:23,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:23,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:23,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:23,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:23,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:23,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:23,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:23,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:23,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:23,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 50 proven. 47 refuted. 0 times theorem prover too weak. 44 trivial. 7 not checked. [2020-10-13 10:59:23,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011357554] [2020-10-13 10:59:23,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:23,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:59:23,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808244877] [2020-10-13 10:59:23,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:59:23,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:23,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:59:23,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=239, Unknown=2, NotChecked=30, Total=306 [2020-10-13 10:59:23,060 INFO L87 Difference]: Start difference. First operand 128 states and 171 transitions. Second operand 18 states. [2020-10-13 10:59:31,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:31,605 INFO L93 Difference]: Finished difference Result 209 states and 290 transitions. [2020-10-13 10:59:31,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 10:59:31,606 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 43 [2020-10-13 10:59:31,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:31,609 INFO L225 Difference]: With dead ends: 209 [2020-10-13 10:59:31,610 INFO L226 Difference]: Without dead ends: 152 [2020-10-13 10:59:31,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=39, Invalid=269, Unknown=2, NotChecked=32, Total=342 [2020-10-13 10:59:31,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-13 10:59:31,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 116. [2020-10-13 10:59:31,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 10:59:31,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 152 transitions. [2020-10-13 10:59:31,622 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 152 transitions. Word has length 43 [2020-10-13 10:59:31,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:31,623 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 152 transitions. [2020-10-13 10:59:31,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 10:59:31,623 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 152 transitions. [2020-10-13 10:59:31,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 10:59:31,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:31,624 INFO L422 BasicCegarLoop]: trace histogram [12, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:31,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 10:59:31,624 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:31,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:31,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2020847888, now seen corresponding path program 7 times [2020-10-13 10:59:31,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:31,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863553165] [2020-10-13 10:59:31,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:31,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:31,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:31,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:33,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:34,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:36,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:36,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 10:59:36,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 10:59:36,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 10:59:36,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:36,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 10:59:36,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 10:59:36,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 10:59:36,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:37,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:37,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:37,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:37,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:37,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:37,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:37,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:37,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:37,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:37,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:37,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 10:59:37,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863553165] [2020-10-13 10:59:37,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:37,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 10:59:37,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479510861] [2020-10-13 10:59:37,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 10:59:37,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:37,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 10:59:37,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:59:37,017 INFO L87 Difference]: Start difference. First operand 116 states and 152 transitions. Second operand 16 states. [2020-10-13 10:59:37,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:37,723 INFO L93 Difference]: Finished difference Result 165 states and 237 transitions. [2020-10-13 10:59:37,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 10:59:37,725 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-13 10:59:37,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:37,726 INFO L225 Difference]: With dead ends: 165 [2020-10-13 10:59:37,726 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 10:59:37,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-13 10:59:37,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 10:59:37,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 119. [2020-10-13 10:59:37,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-13 10:59:37,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 157 transitions. [2020-10-13 10:59:37,740 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 157 transitions. Word has length 43 [2020-10-13 10:59:37,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:37,741 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 157 transitions. [2020-10-13 10:59:37,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 10:59:37,741 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 157 transitions. [2020-10-13 10:59:37,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 10:59:37,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:37,742 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:37,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 10:59:37,742 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:37,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:37,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1341905713, now seen corresponding path program 20 times [2020-10-13 10:59:37,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:37,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370021342] [2020-10-13 10:59:37,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:37,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:38,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:38,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:38,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 10:59:38,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 10:59:38,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 686 [2020-10-13 10:59:38,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:38,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 10:59:38,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 10:59:38,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:59:38,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:38,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:38,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:38,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:38,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:38,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:38,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:38,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:38,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:38,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:38,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:38,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-13 10:59:38,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370021342] [2020-10-13 10:59:38,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:38,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:59:38,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557849553] [2020-10-13 10:59:38,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:59:38,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:38,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:59:38,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:59:38,657 INFO L87 Difference]: Start difference. First operand 119 states and 157 transitions. Second operand 11 states. [2020-10-13 10:59:38,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:38,910 INFO L93 Difference]: Finished difference Result 171 states and 234 transitions. [2020-10-13 10:59:38,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:59:38,911 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-10-13 10:59:38,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:38,912 INFO L225 Difference]: With dead ends: 171 [2020-10-13 10:59:38,912 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 10:59:38,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:59:38,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 10:59:38,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2020-10-13 10:59:38,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-13 10:59:38,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 197 transitions. [2020-10-13 10:59:38,925 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 197 transitions. Word has length 44 [2020-10-13 10:59:38,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:38,925 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 197 transitions. [2020-10-13 10:59:38,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:59:38,925 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 197 transitions. [2020-10-13 10:59:38,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 10:59:38,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:38,926 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:38,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 10:59:38,927 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:38,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:38,927 INFO L82 PathProgramCache]: Analyzing trace with hash -296851106, now seen corresponding path program 21 times [2020-10-13 10:59:38,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:38,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990927312] [2020-10-13 10:59:38,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:38,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:39,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:39,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:42,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:43,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:43,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 10:59:43,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:59:43,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 10:59:43,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:43,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 10:59:43,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 10:59:43,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 10:59:43,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:44,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:44,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:44,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:44,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:44,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:44,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:44,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:44,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:44,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:44,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:44,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-13 10:59:44,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990927312] [2020-10-13 10:59:44,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:44,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 10:59:44,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689815843] [2020-10-13 10:59:44,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 10:59:44,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:44,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 10:59:44,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-13 10:59:44,112 INFO L87 Difference]: Start difference. First operand 150 states and 197 transitions. Second operand 11 states. [2020-10-13 10:59:44,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:59:44,483 INFO L93 Difference]: Finished difference Result 291 states and 388 transitions. [2020-10-13 10:59:44,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 10:59:44,484 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-13 10:59:44,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:59:44,486 INFO L225 Difference]: With dead ends: 291 [2020-10-13 10:59:44,486 INFO L226 Difference]: Without dead ends: 250 [2020-10-13 10:59:44,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-13 10:59:44,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-13 10:59:44,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 132. [2020-10-13 10:59:44,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-13 10:59:44,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 180 transitions. [2020-10-13 10:59:44,497 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 180 transitions. Word has length 45 [2020-10-13 10:59:44,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:59:44,497 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 180 transitions. [2020-10-13 10:59:44,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 10:59:44,497 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 180 transitions. [2020-10-13 10:59:44,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 10:59:44,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:59:44,498 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 10:59:44,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-13 10:59:44,498 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:59:44,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:59:44,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1613800225, now seen corresponding path program 22 times [2020-10-13 10:59:44,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:59:44,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88966947] [2020-10-13 10:59:44,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:59:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:44,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:44,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:44,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:45,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:49,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:49,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 10:59:49,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 10:59:49,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 10:59:49,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:49,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 10:59:49,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 10:59:49,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 10:59:49,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 10:59:49,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:59:49,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:59:49,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:59:49,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:59:49,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-13 10:59:49,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:59:49,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 10:59:49,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:59:49,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:59:49,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:59:49,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:59:49,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:59:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-13 10:59:49,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88966947] [2020-10-13 10:59:49,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 10:59:49,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 10:59:49,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150419012] [2020-10-13 10:59:49,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 10:59:49,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:59:49,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 10:59:49,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-13 10:59:49,919 INFO L87 Difference]: Start difference. First operand 132 states and 180 transitions. Second operand 18 states. [2020-10-13 10:59:54,233 WARN L193 SmtUtils]: Spent 3.56 s on a formula simplification that was a NOOP. DAG size: 51 [2020-10-13 10:59:59,778 WARN L193 SmtUtils]: Spent 571.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-10-13 11:00:02,602 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 31 [2020-10-13 11:00:03,206 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-10-13 11:00:03,736 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-10-13 11:00:08,994 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification that was a NOOP. DAG size: 54 [2020-10-13 11:00:13,709 WARN L193 SmtUtils]: Spent 2.29 s on a formula simplification that was a NOOP. DAG size: 47 [2020-10-13 11:00:17,079 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification that was a NOOP. DAG size: 40