/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init2_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:55:15,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:55:15,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:55:15,416 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:55:15,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:55:15,425 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:55:15,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:55:15,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:55:15,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:55:15,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:55:15,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:55:15,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:55:15,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:55:15,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:55:15,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:55:15,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:55:15,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:55:15,449 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:55:15,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:55:15,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:55:15,461 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:55:15,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:55:15,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:55:15,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:55:15,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:55:15,478 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:55:15,478 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:55:15,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:55:15,484 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:55:15,488 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:55:15,489 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:55:15,489 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:55:15,490 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:55:15,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:55:15,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:55:15,492 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:55:15,492 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:55:15,493 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:55:15,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:55:15,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:55:15,497 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:55:15,498 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 09:55:15,540 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:55:15,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:55:15,543 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:55:15,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:55:15,544 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:55:15,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:55:15,544 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:55:15,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:55:15,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:55:15,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:55:15,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:55:15,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:55:15,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:55:15,547 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:55:15,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:55:15,547 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:55:15,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:55:15,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:55:15,548 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:55:15,548 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:55:15,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:55:15,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:55:15,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:55:15,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:55:15,549 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:55:15,549 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:55:15,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:55:15,550 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:55:15,550 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:55:15,550 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 09:55:15,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:55:15,855 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:55:15,863 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:55:15,865 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:55:15,866 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:55:15,866 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init2_ground-2.i [2020-10-12 09:55:15,939 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5c43241e8/dec8a5615f8c4e5ead8c6d4ee7e426ae/FLAG1cd9ca89f [2020-10-12 09:55:16,358 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:55:16,359 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init2_ground-2.i [2020-10-12 09:55:16,366 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5c43241e8/dec8a5615f8c4e5ead8c6d4ee7e426ae/FLAG1cd9ca89f [2020-10-12 09:55:16,744 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5c43241e8/dec8a5615f8c4e5ead8c6d4ee7e426ae [2020-10-12 09:55:16,753 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:55:16,755 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:55:16,757 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:55:16,758 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:55:16,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:55:16,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:55:16" (1/1) ... [2020-10-12 09:55:16,765 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aae5b2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:16, skipping insertion in model container [2020-10-12 09:55:16,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:55:16" (1/1) ... [2020-10-12 09:55:16,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:55:16,794 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:55:17,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:55:17,008 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:55:17,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:55:17,059 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:55:17,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:17 WrapperNode [2020-10-12 09:55:17,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:55:17,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:55:17,069 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:55:17,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:55:17,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:17" (1/1) ... [2020-10-12 09:55:17,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:17" (1/1) ... [2020-10-12 09:55:17,194 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:17" (1/1) ... [2020-10-12 09:55:17,194 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:17" (1/1) ... [2020-10-12 09:55:17,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:17" (1/1) ... [2020-10-12 09:55:17,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:17" (1/1) ... [2020-10-12 09:55:17,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:17" (1/1) ... [2020-10-12 09:55:17,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:55:17,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:55:17,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:55:17,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:55:17,217 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:55:17,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:55:17,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:55:17,288 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:55:17,289 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:55:17,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:55:17,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:55:17,289 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:55:17,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:55:17,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:55:17,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:55:17,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:55:17,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:55:17,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:55:17,506 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:55:17,507 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-12 09:55:17,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:55:17 BoogieIcfgContainer [2020-10-12 09:55:17,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:55:17,512 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:55:17,512 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:55:17,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:55:17,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:55:16" (1/3) ... [2020-10-12 09:55:17,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7618d796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:55:17, skipping insertion in model container [2020-10-12 09:55:17,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:55:17" (2/3) ... [2020-10-12 09:55:17,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7618d796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:55:17, skipping insertion in model container [2020-10-12 09:55:17,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:55:17" (3/3) ... [2020-10-12 09:55:17,519 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init2_ground-2.i [2020-10-12 09:55:17,531 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:55:17,540 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:55:17,574 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:55:17,611 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:55:17,611 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:55:17,611 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:55:17,612 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:55:17,612 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:55:17,612 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:55:17,612 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:55:17,613 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:55:17,658 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-12 09:55:17,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-12 09:55:17,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:17,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:17,675 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:17,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:17,681 INFO L82 PathProgramCache]: Analyzing trace with hash 2104113866, now seen corresponding path program 1 times [2020-10-12 09:55:17,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:17,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360392425] [2020-10-12 09:55:17,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:17,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:17,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:17,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:17,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 09:55:17,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 09:55:17,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-12 09:55:17,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:17,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:55:17,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:55:17,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:55:17,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:55:18,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:18,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:18,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:18,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:18,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:18,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:18,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 09:55:18,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:18,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:18,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:18,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:18,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:18,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:18,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360392425] [2020-10-12 09:55:18,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:55:18,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:55:18,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758778470] [2020-10-12 09:55:18,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:55:18,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:18,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:55:18,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:55:18,093 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 4 states. [2020-10-12 09:55:18,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:18,204 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2020-10-12 09:55:18,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:55:18,206 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-12 09:55:18,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:18,216 INFO L225 Difference]: With dead ends: 45 [2020-10-12 09:55:18,216 INFO L226 Difference]: Without dead ends: 22 [2020-10-12 09:55:18,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:55:18,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-12 09:55:18,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-12 09:55:18,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-12 09:55:18,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-12 09:55:18,263 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2020-10-12 09:55:18,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:18,264 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-12 09:55:18,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:55:18,264 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-12 09:55:18,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 09:55:18,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:18,265 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:18,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:55:18,266 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:18,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:18,267 INFO L82 PathProgramCache]: Analyzing trace with hash 494025381, now seen corresponding path program 1 times [2020-10-12 09:55:18,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:18,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698893084] [2020-10-12 09:55:18,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:18,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:18,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:18,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:18,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:18,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:18,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-12 09:55:18,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:55:18,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 584 [2020-10-12 09:55:18,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:18,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:55:18,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 09:55:18,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 09:55:18,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:18,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:19,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:19,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:19,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:19,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:19,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:55:19,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:19,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:19,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:19,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:19,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:19,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 09:55:19,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698893084] [2020-10-12 09:55:19,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:19,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:55:19,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758908692] [2020-10-12 09:55:19,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:55:19,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:19,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:55:19,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:55:19,018 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 9 states. [2020-10-12 09:55:19,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:19,317 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-10-12 09:55:19,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 09:55:19,319 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-12 09:55:19,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:19,321 INFO L225 Difference]: With dead ends: 32 [2020-10-12 09:55:19,321 INFO L226 Difference]: Without dead ends: 30 [2020-10-12 09:55:19,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:55:19,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-12 09:55:19,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-10-12 09:55:19,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-12 09:55:19,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-12 09:55:19,351 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 17 [2020-10-12 09:55:19,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:19,352 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-12 09:55:19,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:55:19,353 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-12 09:55:19,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 09:55:19,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:19,357 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:19,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:55:19,358 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:19,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:19,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1814615516, now seen corresponding path program 1 times [2020-10-12 09:55:19,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:19,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079927020] [2020-10-12 09:55:19,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:19,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:19,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:19,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:19,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:19,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:19,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 09:55:19,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 09:55:19,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 431 [2020-10-12 09:55:19,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:19,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:55:19,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:19,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 09:55:19,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:20,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:20,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:20,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:20,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:20,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:20,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:55:20,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:20,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:20,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:20,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:20,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:20,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-12 09:55:20,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:20,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:20,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:20,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:20,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:20,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 09:55:20,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:20,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:20,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:20,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:20,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 09:55:20,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:20,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079927020] [2020-10-12 09:55:20,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:20,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:55:20,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367365164] [2020-10-12 09:55:20,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:55:20,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:20,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:55:20,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:55:20,101 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 10 states. [2020-10-12 09:55:20,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:20,397 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2020-10-12 09:55:20,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:55:20,398 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-12 09:55:20,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:20,413 INFO L225 Difference]: With dead ends: 42 [2020-10-12 09:55:20,414 INFO L226 Difference]: Without dead ends: 29 [2020-10-12 09:55:20,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:55:20,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-12 09:55:20,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-12 09:55:20,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 09:55:20,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-12 09:55:20,429 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2020-10-12 09:55:20,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:20,429 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-12 09:55:20,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:55:20,430 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-12 09:55:20,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 09:55:20,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:20,434 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, 1, 1] [2020-10-12 09:55:20,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:55:20,435 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:20,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:20,436 INFO L82 PathProgramCache]: Analyzing trace with hash 706113055, now seen corresponding path program 2 times [2020-10-12 09:55:20,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:20,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400292672] [2020-10-12 09:55:20,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:20,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:20,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:20,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:20,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:21,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:21,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 09:55:21,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:21,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 603 [2020-10-12 09:55:21,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:21,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:55:21,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:21,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 09:55:21,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:21,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:21,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:21,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:21,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:21,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:21,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:21,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:21,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:21,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:21,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:21,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:21,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-12 09:55:21,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:21,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:21,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:21,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:21,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:21,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 09:55:21,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:21,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:21,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:21,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:21,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:21,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:21,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400292672] [2020-10-12 09:55:21,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:21,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:55:21,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373029838] [2020-10-12 09:55:21,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:55:21,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:21,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:55:21,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:55:21,386 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 11 states. [2020-10-12 09:55:21,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:21,639 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-10-12 09:55:21,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:55:21,640 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-12 09:55:21,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:21,641 INFO L225 Difference]: With dead ends: 43 [2020-10-12 09:55:21,641 INFO L226 Difference]: Without dead ends: 30 [2020-10-12 09:55:21,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:55:21,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-12 09:55:21,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-12 09:55:21,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 09:55:21,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-12 09:55:21,649 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2020-10-12 09:55:21,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:21,650 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-12 09:55:21,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:55:21,650 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-12 09:55:21,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 09:55:21,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:21,651 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, 1, 1] [2020-10-12 09:55:21,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:55:21,652 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:21,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:21,652 INFO L82 PathProgramCache]: Analyzing trace with hash 702275132, now seen corresponding path program 3 times [2020-10-12 09:55:21,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:21,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235049733] [2020-10-12 09:55:21,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:21,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:21,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:21,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:21,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:22,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:22,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 09:55:22,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:22,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 556 [2020-10-12 09:55:22,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:22,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:55:22,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:22,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 09:55:22,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:22,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:22,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:22,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:22,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:22,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:22,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:22,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:22,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:22,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:22,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:22,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:22,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-12 09:55:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:22,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:22,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:22,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:22,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:22,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 09:55:22,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:22,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:22,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:22,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:22,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:22,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235049733] [2020-10-12 09:55:22,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:22,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:55:22,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155493123] [2020-10-12 09:55:22,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:55:22,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:22,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:55:22,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:55:22,469 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 12 states. [2020-10-12 09:55:22,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:22,680 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-10-12 09:55:22,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:55:22,680 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-10-12 09:55:22,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:22,681 INFO L225 Difference]: With dead ends: 44 [2020-10-12 09:55:22,682 INFO L226 Difference]: Without dead ends: 31 [2020-10-12 09:55:22,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:55:22,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-12 09:55:22,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-12 09:55:22,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 09:55:22,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-12 09:55:22,690 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2020-10-12 09:55:22,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:22,690 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-12 09:55:22,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:55:22,690 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-12 09:55:22,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 09:55:22,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:22,692 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:22,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:55:22,692 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:22,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:22,693 INFO L82 PathProgramCache]: Analyzing trace with hash 583299519, now seen corresponding path program 4 times [2020-10-12 09:55:22,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:22,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162495533] [2020-10-12 09:55:22,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:22,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:22,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:22,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:22,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:23,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:23,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 09:55:23,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:23,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 623 [2020-10-12 09:55:23,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:23,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:55:23,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:23,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:55:23,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:23,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:23,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:23,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:23,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:23,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:23,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:23,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:23,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:23,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:23,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:23,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:23,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-12 09:55:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:23,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:23,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:23,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:23,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:23,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:55:23,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:23,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:23,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:23,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:23,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:23,536 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:23,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162495533] [2020-10-12 09:55:23,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:23,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:55:23,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445690521] [2020-10-12 09:55:23,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:55:23,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:23,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:55:23,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:55:23,539 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 13 states. [2020-10-12 09:55:23,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:23,773 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2020-10-12 09:55:23,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:55:23,774 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-12 09:55:23,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:23,775 INFO L225 Difference]: With dead ends: 45 [2020-10-12 09:55:23,775 INFO L226 Difference]: Without dead ends: 32 [2020-10-12 09:55:23,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:55:23,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-12 09:55:23,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-12 09:55:23,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-12 09:55:23,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-12 09:55:23,782 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2020-10-12 09:55:23,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:23,783 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-12 09:55:23,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:55:23,783 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-12 09:55:23,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 09:55:23,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:23,784 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:23,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:55:23,785 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:23,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:23,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1190022812, now seen corresponding path program 5 times [2020-10-12 09:55:23,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:23,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848720581] [2020-10-12 09:55:23,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:23,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:23,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:23,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:24,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:24,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:24,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 09:55:24,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:24,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 674 [2020-10-12 09:55:24,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:24,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:55:24,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:24,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 09:55:24,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:24,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:24,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:24,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:24,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:24,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:24,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:55:24,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:24,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:24,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:24,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:24,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:24,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-12 09:55:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:24,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:24,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:24,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:24,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:24,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 09:55:24,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:24,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:24,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:24,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:24,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:24,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848720581] [2020-10-12 09:55:24,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:24,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:55:24,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193411568] [2020-10-12 09:55:24,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:55:24,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:24,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:55:24,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:55:24,779 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 14 states. [2020-10-12 09:55:25,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:25,123 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-10-12 09:55:25,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:55:25,124 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-12 09:55:25,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:25,125 INFO L225 Difference]: With dead ends: 46 [2020-10-12 09:55:25,125 INFO L226 Difference]: Without dead ends: 33 [2020-10-12 09:55:25,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:55:25,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-12 09:55:25,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-12 09:55:25,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 09:55:25,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-12 09:55:25,142 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2020-10-12 09:55:25,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:25,143 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-12 09:55:25,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:55:25,143 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-12 09:55:25,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 09:55:25,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:25,147 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:25,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:55:25,148 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:25,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:25,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1476391585, now seen corresponding path program 6 times [2020-10-12 09:55:25,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:25,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182739910] [2020-10-12 09:55:25,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:25,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:25,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:25,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:25,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:25,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:26,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:26,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 09:55:26,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:26,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1075 [2020-10-12 09:55:26,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:26,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:55:26,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:26,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 09:55:26,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:26,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:26,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:26,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:26,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:26,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:26,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:26,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:26,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:26,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:26,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:26,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:26,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-12 09:55:26,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:26,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:26,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:26,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:26,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:26,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:55:26,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:26,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:26,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:26,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:26,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:26,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182739910] [2020-10-12 09:55:26,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:26,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:55:26,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000583856] [2020-10-12 09:55:26,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:55:26,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:26,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:55:26,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:55:26,600 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 15 states. [2020-10-12 09:55:26,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:26,780 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-10-12 09:55:26,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:55:26,781 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-10-12 09:55:26,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:26,782 INFO L225 Difference]: With dead ends: 47 [2020-10-12 09:55:26,782 INFO L226 Difference]: Without dead ends: 34 [2020-10-12 09:55:26,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:55:26,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-12 09:55:26,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-12 09:55:26,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-12 09:55:26,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-12 09:55:26,789 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 30 [2020-10-12 09:55:26,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:26,789 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-12 09:55:26,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:55:26,789 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-12 09:55:26,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 09:55:26,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:26,790 INFO L422 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:26,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:55:26,791 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:26,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:26,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1764108028, now seen corresponding path program 7 times [2020-10-12 09:55:26,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:26,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1131556771] [2020-10-12 09:55:26,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:26,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:26,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:26,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:27,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:27,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:27,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 09:55:27,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:27,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 822 [2020-10-12 09:55:27,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:27,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 09:55:27,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:27,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 09:55:27,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:28,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:28,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:28,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:28,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:28,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:28,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:28,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:28,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:28,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:28,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:28,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:28,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-12 09:55:28,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:28,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:28,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:28,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:28,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:28,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:55:28,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:28,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:28,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:28,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:28,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:28,171 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:28,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1131556771] [2020-10-12 09:55:28,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:28,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:55:28,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549027739] [2020-10-12 09:55:28,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:55:28,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:28,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:55:28,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:55:28,174 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 16 states. [2020-10-12 09:55:28,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:28,433 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-10-12 09:55:28,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:55:28,433 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-10-12 09:55:28,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:28,434 INFO L225 Difference]: With dead ends: 48 [2020-10-12 09:55:28,435 INFO L226 Difference]: Without dead ends: 35 [2020-10-12 09:55:28,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:55:28,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-12 09:55:28,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-12 09:55:28,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 09:55:28,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-12 09:55:28,441 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 31 [2020-10-12 09:55:28,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:28,442 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-12 09:55:28,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:55:28,442 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-12 09:55:28,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 09:55:28,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:28,443 INFO L422 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:28,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:55:28,444 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:28,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:28,444 INFO L82 PathProgramCache]: Analyzing trace with hash -859619073, now seen corresponding path program 8 times [2020-10-12 09:55:28,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:28,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016580058] [2020-10-12 09:55:28,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:28,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:28,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:28,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:28,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:29,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:29,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 09:55:29,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:29,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 716 [2020-10-12 09:55:29,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:29,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:55:29,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:29,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:55:29,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:29,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:29,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:29,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:29,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:29,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:29,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:29,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:29,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:29,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:29,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:29,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:29,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-12 09:55:29,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:29,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:29,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:29,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:29,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:29,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:55:29,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:29,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:29,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:29,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:29,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:29,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016580058] [2020-10-12 09:55:29,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:29,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:55:29,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796353229] [2020-10-12 09:55:29,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:55:29,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:29,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:55:29,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:55:29,522 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 17 states. [2020-10-12 09:55:29,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:29,710 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-10-12 09:55:29,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:55:29,711 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-10-12 09:55:29,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:29,712 INFO L225 Difference]: With dead ends: 49 [2020-10-12 09:55:29,712 INFO L226 Difference]: Without dead ends: 36 [2020-10-12 09:55:29,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:55:29,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-12 09:55:29,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-12 09:55:29,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-12 09:55:29,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-12 09:55:29,718 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 32 [2020-10-12 09:55:29,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:29,719 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-12 09:55:29,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:55:29,719 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-12 09:55:29,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 09:55:29,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:29,720 INFO L422 BasicCegarLoop]: trace histogram [9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:29,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:55:29,720 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:29,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:29,721 INFO L82 PathProgramCache]: Analyzing trace with hash -590780580, now seen corresponding path program 9 times [2020-10-12 09:55:29,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:29,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581599961] [2020-10-12 09:55:29,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:29,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:29,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:29,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:30,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:30,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:30,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 09:55:30,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:30,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 855 [2020-10-12 09:55:30,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:30,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 09:55:30,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:30,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 09:55:30,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:31,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:31,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:31,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:31,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:31,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:31,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:31,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:31,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:31,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:31,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:31,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:31,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-12 09:55:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:31,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:31,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:31,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:31,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:31,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:55:31,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:31,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:31,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:31,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:31,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:31,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581599961] [2020-10-12 09:55:31,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:31,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:55:31,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842684251] [2020-10-12 09:55:31,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:55:31,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:31,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:55:31,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:55:31,195 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 18 states. [2020-10-12 09:55:31,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:31,493 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-10-12 09:55:31,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:55:31,493 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2020-10-12 09:55:31,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:31,494 INFO L225 Difference]: With dead ends: 50 [2020-10-12 09:55:31,494 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 09:55:31,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:55:31,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 09:55:31,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-12 09:55:31,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 09:55:31,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-12 09:55:31,501 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 33 [2020-10-12 09:55:31,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:31,501 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-12 09:55:31,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:55:31,502 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-12 09:55:31,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 09:55:31,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:31,503 INFO L422 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:31,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:55:31,503 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:31,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:31,504 INFO L82 PathProgramCache]: Analyzing trace with hash -846721889, now seen corresponding path program 10 times [2020-10-12 09:55:31,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:31,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286839282] [2020-10-12 09:55:31,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:31,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:31,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:31,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:32,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:32,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:32,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 09:55:32,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:32,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1239 [2020-10-12 09:55:32,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:32,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 09:55:32,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:32,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 09:55:32,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:33,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:33,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:33,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:33,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:33,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:33,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:33,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:33,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:33,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:33,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:33,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:33,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:33,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-12 09:55:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:33,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:33,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:33,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:33,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:33,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:55:33,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:33,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:33,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:33,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:33,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:33,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286839282] [2020-10-12 09:55:33,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:33,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 09:55:33,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346941348] [2020-10-12 09:55:33,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 09:55:33,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:33,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 09:55:33,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:55:33,474 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 19 states. [2020-10-12 09:55:33,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:33,755 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2020-10-12 09:55:33,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 09:55:33,756 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2020-10-12 09:55:33,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:33,757 INFO L225 Difference]: With dead ends: 51 [2020-10-12 09:55:33,757 INFO L226 Difference]: Without dead ends: 38 [2020-10-12 09:55:33,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:55:33,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-12 09:55:33,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-12 09:55:33,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 09:55:33,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-12 09:55:33,772 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2020-10-12 09:55:33,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:33,772 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-12 09:55:33,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 09:55:33,773 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-12 09:55:33,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 09:55:33,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:33,773 INFO L422 BasicCegarLoop]: trace histogram [11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:33,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:55:33,774 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:33,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:33,776 INFO L82 PathProgramCache]: Analyzing trace with hash -190967876, now seen corresponding path program 11 times [2020-10-12 09:55:33,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:33,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064376004] [2020-10-12 09:55:33,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:33,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:33,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:34,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:34,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:34,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:34,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 09:55:34,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:34,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1038 [2020-10-12 09:55:34,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:34,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 09:55:34,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:34,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 09:55:34,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:35,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:35,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:35,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:35,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:35,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:35,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:35,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:35,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:35,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:35,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:35,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:35,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:35,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-12 09:55:35,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:35,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:35,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:35,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:35,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:35,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 09:55:35,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:35,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:35,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:35,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:35,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:35,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064376004] [2020-10-12 09:55:35,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:35,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:55:35,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700219566] [2020-10-12 09:55:35,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:55:35,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:35,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:55:35,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:55:35,383 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 20 states. [2020-10-12 09:55:35,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:35,675 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-10-12 09:55:35,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:55:35,676 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 35 [2020-10-12 09:55:35,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:35,677 INFO L225 Difference]: With dead ends: 52 [2020-10-12 09:55:35,677 INFO L226 Difference]: Without dead ends: 39 [2020-10-12 09:55:35,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=171, Invalid=429, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:55:35,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-12 09:55:35,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-12 09:55:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 09:55:35,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-12 09:55:35,686 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 35 [2020-10-12 09:55:35,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:35,687 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-12 09:55:35,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:55:35,687 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-12 09:55:35,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 09:55:35,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:35,691 INFO L422 BasicCegarLoop]: trace histogram [12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:35,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:55:35,691 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:35,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:35,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1337429953, now seen corresponding path program 12 times [2020-10-12 09:55:35,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:35,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979073987] [2020-10-12 09:55:35,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:35,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:35,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:35,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:36,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:36,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:36,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 09:55:36,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:36,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1188 [2020-10-12 09:55:36,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:36,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 09:55:36,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:36,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:55:36,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:37,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:37,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:37,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:37,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:37,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:37,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:37,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:37,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:37,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:37,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:37,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:37,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:37,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 09:55:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:37,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:37,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:37,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:37,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:37,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:55:37,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:37,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:37,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:37,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:37,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:37,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979073987] [2020-10-12 09:55:37,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:37,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:55:37,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549309151] [2020-10-12 09:55:37,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:55:37,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:37,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:55:37,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:55:37,765 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 21 states. [2020-10-12 09:55:38,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:38,051 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-10-12 09:55:38,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:55:38,052 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 36 [2020-10-12 09:55:38,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:38,053 INFO L225 Difference]: With dead ends: 53 [2020-10-12 09:55:38,053 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 09:55:38,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:55:38,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 09:55:38,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-12 09:55:38,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 09:55:38,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-10-12 09:55:38,059 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 36 [2020-10-12 09:55:38,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:38,060 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-10-12 09:55:38,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:55:38,060 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-10-12 09:55:38,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 09:55:38,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:38,060 INFO L422 BasicCegarLoop]: trace histogram [13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:38,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:55:38,061 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:38,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:38,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1776951324, now seen corresponding path program 13 times [2020-10-12 09:55:38,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:38,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121810353] [2020-10-12 09:55:38,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:38,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:38,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:38,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:38,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:38,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:39,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:39,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 09:55:39,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:39,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 988 [2020-10-12 09:55:39,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:39,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 09:55:39,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:39,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 09:55:39,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:39,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:39,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:39,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:39,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:39,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:39,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:39,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:39,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:39,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:39,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:39,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:39,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-12 09:55:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:39,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:39,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:39,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:39,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:39,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:55:39,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:39,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:39,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:39,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:39,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:39,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121810353] [2020-10-12 09:55:39,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:39,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:55:39,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690145712] [2020-10-12 09:55:39,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:55:39,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:39,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:55:39,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:55:39,711 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 22 states. [2020-10-12 09:55:39,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:39,922 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-10-12 09:55:39,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:55:39,923 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2020-10-12 09:55:39,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:39,924 INFO L225 Difference]: With dead ends: 54 [2020-10-12 09:55:39,924 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 09:55:39,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=494, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:55:39,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 09:55:39,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-12 09:55:39,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 09:55:39,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-12 09:55:39,938 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 37 [2020-10-12 09:55:39,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:39,939 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-12 09:55:39,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:55:39,939 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-12 09:55:39,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 09:55:39,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:39,940 INFO L422 BasicCegarLoop]: trace histogram [14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:39,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:55:39,940 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:39,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:39,940 INFO L82 PathProgramCache]: Analyzing trace with hash -461476897, now seen corresponding path program 14 times [2020-10-12 09:55:39,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:39,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097812014] [2020-10-12 09:55:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:39,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:39,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:39,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:40,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:40,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:41,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:41,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 09:55:41,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:41,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1136 [2020-10-12 09:55:41,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:41,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 09:55:41,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:41,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 09:55:41,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:41,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:41,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:41,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:41,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:41,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:41,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:41,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:41,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:41,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:41,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:41,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:41,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-12 09:55:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:41,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:41,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:41,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:41,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:41,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:55:41,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:41,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:41,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:41,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:41,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 4 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:41,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097812014] [2020-10-12 09:55:41,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:41,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 09:55:41,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624495501] [2020-10-12 09:55:41,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 09:55:41,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:41,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 09:55:41,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:55:41,887 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 23 states. [2020-10-12 09:55:42,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:42,188 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2020-10-12 09:55:42,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 09:55:42,189 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 38 [2020-10-12 09:55:42,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:42,190 INFO L225 Difference]: With dead ends: 55 [2020-10-12 09:55:42,190 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 09:55:42,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=228, Invalid=528, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:55:42,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 09:55:42,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-12 09:55:42,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 09:55:42,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-10-12 09:55:42,198 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 38 [2020-10-12 09:55:42,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:42,198 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-10-12 09:55:42,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 09:55:42,198 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-10-12 09:55:42,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 09:55:42,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:42,199 INFO L422 BasicCegarLoop]: trace histogram [15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:42,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 09:55:42,199 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:42,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:42,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1133275012, now seen corresponding path program 15 times [2020-10-12 09:55:42,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:42,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003977826] [2020-10-12 09:55:42,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:42,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:42,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:42,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:42,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:43,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:43,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 09:55:43,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:43,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1258 [2020-10-12 09:55:43,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:43,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 09:55:43,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:43,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 09:55:43,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:44,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:44,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:44,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:44,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:44,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:44,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:44,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:44,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:44,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:44,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:44,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:44,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:44,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-12 09:55:44,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:44,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:44,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:44,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:44,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:44,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:55:44,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:44,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:44,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:44,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:44,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 4 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:44,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003977826] [2020-10-12 09:55:44,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:44,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 09:55:44,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236150408] [2020-10-12 09:55:44,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 09:55:44,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:44,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 09:55:44,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:55:44,757 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 24 states. [2020-10-12 09:55:45,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:45,088 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-10-12 09:55:45,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:55:45,088 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 39 [2020-10-12 09:55:45,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:45,089 INFO L225 Difference]: With dead ends: 56 [2020-10-12 09:55:45,089 INFO L226 Difference]: Without dead ends: 43 [2020-10-12 09:55:45,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=249, Invalid=563, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:55:45,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-12 09:55:45,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-12 09:55:45,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 09:55:45,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-12 09:55:45,096 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 39 [2020-10-12 09:55:45,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:45,096 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-12 09:55:45,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 09:55:45,096 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-12 09:55:45,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 09:55:45,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:45,097 INFO L422 BasicCegarLoop]: trace histogram [16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:45,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 09:55:45,097 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:45,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:45,098 INFO L82 PathProgramCache]: Analyzing trace with hash -484180097, now seen corresponding path program 16 times [2020-10-12 09:55:45,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:45,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087358231] [2020-10-12 09:55:45,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:45,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:45,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:45,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:46,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:46,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:46,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 09:55:46,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:46,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1699 [2020-10-12 09:55:46,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:46,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 09:55:46,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:46,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 09:55:46,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:48,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:48,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:48,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:48,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:48,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:48,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:48,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:48,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:48,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:48,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:48,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:48,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-12 09:55:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:48,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:48,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:48,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:48,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:48,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:55:48,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:48,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:48,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:48,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:48,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 4 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:48,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087358231] [2020-10-12 09:55:48,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:48,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:55:48,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512969664] [2020-10-12 09:55:48,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:55:48,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:48,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:55:48,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:55:48,263 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 25 states. [2020-10-12 09:55:48,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:48,690 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2020-10-12 09:55:48,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 09:55:48,690 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 40 [2020-10-12 09:55:48,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:48,691 INFO L225 Difference]: With dead ends: 57 [2020-10-12 09:55:48,691 INFO L226 Difference]: Without dead ends: 44 [2020-10-12 09:55:48,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=271, Invalid=599, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:55:48,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-12 09:55:48,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-12 09:55:48,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 09:55:48,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-12 09:55:48,700 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 40 [2020-10-12 09:55:48,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:48,701 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-12 09:55:48,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:55:48,701 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-12 09:55:48,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 09:55:48,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:48,701 INFO L422 BasicCegarLoop]: trace histogram [17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:48,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 09:55:48,702 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:48,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:48,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1837074212, now seen corresponding path program 17 times [2020-10-12 09:55:48,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:48,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108159678] [2020-10-12 09:55:48,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:48,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:48,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:48,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:49,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:49,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:50,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:50,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 09:55:50,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:50,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1322 [2020-10-12 09:55:50,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:50,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:55:50,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:50,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 09:55:50,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:55:51,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:51,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:51,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:51,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:51,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:51,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:51,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:51,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:51,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:51,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:51,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:51,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-12 09:55:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:51,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:51,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:51,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:51,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:51,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:51,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:51,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:51,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:51,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:51,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 4 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:51,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108159678] [2020-10-12 09:55:51,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:51,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:55:51,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949131932] [2020-10-12 09:55:51,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:55:51,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:51,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:55:51,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:55:51,510 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 26 states. [2020-10-12 09:55:51,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:51,823 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2020-10-12 09:55:51,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 09:55:51,823 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 41 [2020-10-12 09:55:51,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:51,824 INFO L225 Difference]: With dead ends: 58 [2020-10-12 09:55:51,824 INFO L226 Difference]: Without dead ends: 45 [2020-10-12 09:55:51,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:55:51,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-12 09:55:51,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-12 09:55:51,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 09:55:51,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-10-12 09:55:51,835 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 41 [2020-10-12 09:55:51,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:51,835 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-10-12 09:55:51,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:55:51,835 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-10-12 09:55:51,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 09:55:51,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:51,836 INFO L422 BasicCegarLoop]: trace histogram [18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:51,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 09:55:51,836 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:51,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:51,836 INFO L82 PathProgramCache]: Analyzing trace with hash -827118817, now seen corresponding path program 18 times [2020-10-12 09:55:51,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:51,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871755311] [2020-10-12 09:55:51,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:51,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:51,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:52,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:52,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:53,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:53,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 09:55:53,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:53,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1213 [2020-10-12 09:55:53,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:53,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 09:55:53,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:53,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 09:55:53,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:54,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:54,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:54,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:54,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:54,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:54,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:54,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:54,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:54,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:54,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:54,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:54,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 09:55:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:54,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:54,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:54,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:54,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:54,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:54,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:54,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:54,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:54,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:54,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:54,500 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 4 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:54,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871755311] [2020-10-12 09:55:54,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:54,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 09:55:54,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036438616] [2020-10-12 09:55:54,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 09:55:54,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:54,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 09:55:54,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:55:54,503 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 27 states. [2020-10-12 09:55:54,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:54,897 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-10-12 09:55:54,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 09:55:54,898 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 42 [2020-10-12 09:55:54,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:54,899 INFO L225 Difference]: With dead ends: 59 [2020-10-12 09:55:54,899 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 09:55:54,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=318, Invalid=674, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:55:54,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 09:55:54,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-12 09:55:54,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 09:55:54,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-12 09:55:54,906 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 42 [2020-10-12 09:55:54,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:54,906 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-12 09:55:54,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 09:55:54,906 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-12 09:55:54,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 09:55:54,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:54,907 INFO L422 BasicCegarLoop]: trace histogram [19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:54,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 09:55:54,907 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:54,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:54,908 INFO L82 PathProgramCache]: Analyzing trace with hash 416727356, now seen corresponding path program 19 times [2020-10-12 09:55:54,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:54,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329858233] [2020-10-12 09:55:54,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:54,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:54,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:55,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:55,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:56,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:56,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 09:55:56,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:56,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1197 [2020-10-12 09:55:56,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:56,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:55:56,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:56,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 09:55:56,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:57,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:57,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:57,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:57,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:57,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:57,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:57,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:57,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:57,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:57,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:57,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:57,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-12 09:55:57,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:57,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:57,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:57,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:55:57,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:57,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:55:57,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:57,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:55:57,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:55:57,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:55:57,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:57,757 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 4 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:55:57,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329858233] [2020-10-12 09:55:57,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:57,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:55:57,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836146258] [2020-10-12 09:55:57,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:55:57,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:57,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:55:57,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=494, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:55:57,760 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 28 states. [2020-10-12 09:55:58,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:58,150 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2020-10-12 09:55:58,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 09:55:58,151 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 43 [2020-10-12 09:55:58,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:58,152 INFO L225 Difference]: With dead ends: 60 [2020-10-12 09:55:58,152 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 09:55:58,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=343, Invalid=713, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:55:58,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 09:55:58,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-12 09:55:58,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 09:55:58,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-10-12 09:55:58,161 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 43 [2020-10-12 09:55:58,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:58,162 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-10-12 09:55:58,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:55:58,162 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-10-12 09:55:58,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 09:55:58,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:58,163 INFO L422 BasicCegarLoop]: trace histogram [20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:58,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 09:55:58,163 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:58,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:58,163 INFO L82 PathProgramCache]: Analyzing trace with hash 321253055, now seen corresponding path program 20 times [2020-10-12 09:55:58,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:58,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234427256] [2020-10-12 09:55:58,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:58,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:58,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:58,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:58,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:59,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:59,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 09:55:59,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:55:59,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 833 [2020-10-12 09:55:59,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:59,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 09:55:59,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:55:59,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 09:55:59,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:00,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:00,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:00,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:00,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:00,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:00,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:00,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:00,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:00,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:00,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:00,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:00,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-12 09:56:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:00,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:00,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:00,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:00,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:00,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:56:00,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:00,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:56:00,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:56:00,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:00,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:00,321 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 4 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:56:00,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234427256] [2020-10-12 09:56:00,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:00,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 09:56:00,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068345238] [2020-10-12 09:56:00,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 09:56:00,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:00,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 09:56:00,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=527, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:56:00,323 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 29 states. [2020-10-12 09:56:00,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:00,724 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2020-10-12 09:56:00,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 09:56:00,727 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 44 [2020-10-12 09:56:00,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:00,728 INFO L225 Difference]: With dead ends: 61 [2020-10-12 09:56:00,728 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 09:56:00,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:56:00,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 09:56:00,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-12 09:56:00,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 09:56:00,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-12 09:56:00,735 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 44 [2020-10-12 09:56:00,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:00,735 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-12 09:56:00,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 09:56:00,735 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-12 09:56:00,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 09:56:00,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:00,736 INFO L422 BasicCegarLoop]: trace histogram [21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:00,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 09:56:00,736 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:00,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:00,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1656517020, now seen corresponding path program 21 times [2020-10-12 09:56:00,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:00,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869258691] [2020-10-12 09:56:00,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:00,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:00,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:01,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:01,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:01,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:01,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 09:56:01,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:01,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1231 [2020-10-12 09:56:01,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:01,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:56:01,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:56:01,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 09:56:01,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:04,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:04,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:04,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:04,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:04,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:04,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:04,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:04,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:04,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:04,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:04,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:04,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:04,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-12 09:56:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:04,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:04,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:04,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:04,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:04,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:56:04,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:04,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:56:04,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:56:04,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:04,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:04,090 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 4 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:56:04,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869258691] [2020-10-12 09:56:04,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:04,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 09:56:04,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127772314] [2020-10-12 09:56:04,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 09:56:04,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:04,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 09:56:04,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=561, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:56:04,092 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 30 states. [2020-10-12 09:56:04,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:04,553 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2020-10-12 09:56:04,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 09:56:04,554 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 45 [2020-10-12 09:56:04,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:04,555 INFO L225 Difference]: With dead ends: 62 [2020-10-12 09:56:04,555 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 09:56:04,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=396, Invalid=794, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:56:04,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 09:56:04,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-12 09:56:04,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 09:56:04,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-10-12 09:56:04,562 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 45 [2020-10-12 09:56:04,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:04,562 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-10-12 09:56:04,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 09:56:04,562 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-10-12 09:56:04,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 09:56:04,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:04,563 INFO L422 BasicCegarLoop]: trace histogram [22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:04,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 09:56:04,564 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:04,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:04,564 INFO L82 PathProgramCache]: Analyzing trace with hash 100026975, now seen corresponding path program 22 times [2020-10-12 09:56:04,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:04,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428096940] [2020-10-12 09:56:04,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:04,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:04,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:04,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:05,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:05,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:05,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 09:56:05,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:05,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1121 [2020-10-12 09:56:05,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:05,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 09:56:05,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:56:05,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:56:05,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:07,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:07,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:07,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:07,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:07,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:07,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:07,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:07,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:07,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:07,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:07,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:07,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-12 09:56:07,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:07,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:07,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:07,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:07,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:07,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:56:07,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:07,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:56:07,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:56:07,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:07,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 4 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:56:07,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428096940] [2020-10-12 09:56:07,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:07,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 09:56:07,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075583316] [2020-10-12 09:56:07,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 09:56:07,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:07,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 09:56:07,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=596, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:56:07,880 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 31 states. [2020-10-12 09:56:08,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:08,291 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2020-10-12 09:56:08,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 09:56:08,291 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 46 [2020-10-12 09:56:08,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:08,292 INFO L225 Difference]: With dead ends: 63 [2020-10-12 09:56:08,292 INFO L226 Difference]: Without dead ends: 50 [2020-10-12 09:56:08,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=424, Invalid=836, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:56:08,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-12 09:56:08,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-12 09:56:08,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-12 09:56:08,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2020-10-12 09:56:08,302 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 46 [2020-10-12 09:56:08,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:08,302 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2020-10-12 09:56:08,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 09:56:08,302 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2020-10-12 09:56:08,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 09:56:08,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:08,304 INFO L422 BasicCegarLoop]: trace histogram [23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:08,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 09:56:08,307 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:08,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:08,307 INFO L82 PathProgramCache]: Analyzing trace with hash -906524164, now seen corresponding path program 23 times [2020-10-12 09:56:08,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:08,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016357585] [2020-10-12 09:56:08,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:08,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:08,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:08,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:08,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:08,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:09,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:09,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 09:56:09,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:09,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1168 [2020-10-12 09:56:09,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:09,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 09:56:09,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:56:09,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 09:56:09,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:11,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:11,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:11,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:11,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:11,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:11,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:11,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:11,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:11,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:11,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:11,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:11,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-12 09:56:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:11,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:11,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:11,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:11,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:11,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:56:11,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:11,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:56:11,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:56:11,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:11,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 4 proven. 277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:56:11,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016357585] [2020-10-12 09:56:11,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:11,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 09:56:11,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070586088] [2020-10-12 09:56:11,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 09:56:11,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:11,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 09:56:11,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=632, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:56:11,157 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 32 states. [2020-10-12 09:56:11,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:11,766 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2020-10-12 09:56:11,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 09:56:11,767 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 47 [2020-10-12 09:56:11,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:11,769 INFO L225 Difference]: With dead ends: 64 [2020-10-12 09:56:11,769 INFO L226 Difference]: Without dead ends: 51 [2020-10-12 09:56:11,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=453, Invalid=879, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:56:11,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-12 09:56:11,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-12 09:56:11,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 09:56:11,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-12 09:56:11,786 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 47 [2020-10-12 09:56:11,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:11,786 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-12 09:56:11,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 09:56:11,787 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-12 09:56:11,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 09:56:11,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:11,795 INFO L422 BasicCegarLoop]: trace histogram [24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:11,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 09:56:11,796 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:11,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:11,797 INFO L82 PathProgramCache]: Analyzing trace with hash -2044838401, now seen corresponding path program 24 times [2020-10-12 09:56:11,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:11,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400209292] [2020-10-12 09:56:11,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:11,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:11,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:12,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:12,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:13,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:13,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 09:56:13,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:13,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1838 [2020-10-12 09:56:13,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:13,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 09:56:13,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:56:13,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 09:56:13,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:16,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:16,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:16,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:16,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:16,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:16,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:16,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:16,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:16,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:16,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:16,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:16,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 09:56:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:16,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:16,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:16,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:16,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:16,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:56:16,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:16,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:56:16,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:56:16,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:16,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 4 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:56:16,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400209292] [2020-10-12 09:56:16,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:16,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 09:56:16,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116787393] [2020-10-12 09:56:16,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 09:56:16,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:16,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 09:56:16,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=669, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:56:16,238 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 33 states. [2020-10-12 09:56:16,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:16,726 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2020-10-12 09:56:16,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 09:56:16,727 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 48 [2020-10-12 09:56:16,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:16,728 INFO L225 Difference]: With dead ends: 65 [2020-10-12 09:56:16,728 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 09:56:16,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=483, Invalid=923, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:56:16,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 09:56:16,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-12 09:56:16,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-12 09:56:16,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-12 09:56:16,735 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 48 [2020-10-12 09:56:16,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:16,736 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-12 09:56:16,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 09:56:16,736 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-12 09:56:16,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 09:56:16,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:16,737 INFO L422 BasicCegarLoop]: trace histogram [25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:16,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 09:56:16,737 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:16,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:16,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1322125916, now seen corresponding path program 25 times [2020-10-12 09:56:16,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:16,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077176472] [2020-10-12 09:56:16,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:16,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:16,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:16,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:17,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:17,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:18,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:18,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 09:56:18,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:18,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1620 [2020-10-12 09:56:18,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:18,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 09:56:18,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:56:18,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 09:56:18,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:21,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:21,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:21,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:21,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:21,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:21,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:21,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:21,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:21,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:21,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:21,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:21,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-12 09:56:21,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:21,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:21,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:21,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:21,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:21,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:56:21,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:21,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:56:21,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:56:21,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:21,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:21,212 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 4 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:56:21,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077176472] [2020-10-12 09:56:21,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:21,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 09:56:21,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386628798] [2020-10-12 09:56:21,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 09:56:21,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:21,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 09:56:21,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=707, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:56:21,214 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 34 states. [2020-10-12 09:56:21,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:21,724 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-10-12 09:56:21,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 09:56:21,725 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 49 [2020-10-12 09:56:21,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:21,726 INFO L225 Difference]: With dead ends: 66 [2020-10-12 09:56:21,726 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 09:56:21,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=514, Invalid=968, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 09:56:21,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 09:56:21,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-12 09:56:21,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 09:56:21,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-12 09:56:21,733 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 49 [2020-10-12 09:56:21,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:21,733 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-12 09:56:21,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 09:56:21,733 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-12 09:56:21,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 09:56:21,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:21,734 INFO L422 BasicCegarLoop]: trace histogram [26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:21,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 09:56:21,734 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:21,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:21,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1676162657, now seen corresponding path program 26 times [2020-10-12 09:56:21,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:21,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563491854] [2020-10-12 09:56:21,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:21,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:21,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:22,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:22,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:23,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:23,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 09:56:23,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:23,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1903 [2020-10-12 09:56:23,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:23,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 09:56:23,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:56:23,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 09:56:23,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:26,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:26,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:26,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:26,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:26,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:26,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:26,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:26,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:26,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:26,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:26,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:26,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:26,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-12 09:56:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:26,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:26,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:26,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:26,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:26,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:56:26,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:26,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:56:26,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:56:26,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:26,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:26,736 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 4 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:56:26,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563491854] [2020-10-12 09:56:26,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:26,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 09:56:26,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798274417] [2020-10-12 09:56:26,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 09:56:26,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:26,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 09:56:26,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=746, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:56:26,739 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 35 states. [2020-10-12 09:56:27,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:27,308 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2020-10-12 09:56:27,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 09:56:27,309 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 50 [2020-10-12 09:56:27,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:27,309 INFO L225 Difference]: With dead ends: 67 [2020-10-12 09:56:27,309 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 09:56:27,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 09:56:27,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 09:56:27,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-12 09:56:27,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-12 09:56:27,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-10-12 09:56:27,316 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 50 [2020-10-12 09:56:27,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:27,317 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-10-12 09:56:27,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 09:56:27,317 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-10-12 09:56:27,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 09:56:27,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:27,317 INFO L422 BasicCegarLoop]: trace histogram [27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:27,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 09:56:27,318 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:27,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:27,318 INFO L82 PathProgramCache]: Analyzing trace with hash -133827908, now seen corresponding path program 27 times [2020-10-12 09:56:27,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:27,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835030890] [2020-10-12 09:56:27,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:27,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:27,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:27,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:27,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:28,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:29,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:29,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-12 09:56:29,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:29,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1790 [2020-10-12 09:56:29,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:29,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 09:56:29,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:56:29,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 09:56:29,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:31,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:31,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:31,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:31,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:31,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:31,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:31,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:31,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:31,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:31,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:31,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:31,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-12 09:56:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:31,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:31,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:31,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:31,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:31,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:56:31,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:31,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:56:31,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:56:31,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:31,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:31,631 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 4 proven. 379 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:56:31,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835030890] [2020-10-12 09:56:31,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:31,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 09:56:31,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114384068] [2020-10-12 09:56:31,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 09:56:31,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:31,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 09:56:31,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=786, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:56:31,633 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 36 states. [2020-10-12 09:56:32,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:32,186 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-10-12 09:56:32,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 09:56:32,188 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 51 [2020-10-12 09:56:32,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:32,188 INFO L225 Difference]: With dead ends: 68 [2020-10-12 09:56:32,189 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 09:56:32,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=579, Invalid=1061, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 09:56:32,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 09:56:32,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-12 09:56:32,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 09:56:32,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-12 09:56:32,195 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 51 [2020-10-12 09:56:32,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:32,196 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-12 09:56:32,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 09:56:32,196 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-12 09:56:32,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 09:56:32,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:32,197 INFO L422 BasicCegarLoop]: trace histogram [28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:32,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 09:56:32,197 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:32,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:32,197 INFO L82 PathProgramCache]: Analyzing trace with hash 433909055, now seen corresponding path program 28 times [2020-10-12 09:56:32,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:32,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977326555] [2020-10-12 09:56:32,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:32,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:32,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:32,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:32,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:32,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:33,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:33,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 09:56:33,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:33,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1525 [2020-10-12 09:56:33,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:33,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 09:56:33,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:56:33,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 09:56:33,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:36,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:36,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:36,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:36,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:36,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:36,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:36,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:36,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:36,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:36,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:36,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:36,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-12 09:56:36,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:36,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:36,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:36,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:36,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:36,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:36,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:36,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:56:36,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:56:36,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:36,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 4 proven. 407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:56:36,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977326555] [2020-10-12 09:56:36,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:36,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 09:56:36,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309177028] [2020-10-12 09:56:36,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 09:56:36,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:36,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 09:56:36,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=827, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:56:36,353 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 37 states. [2020-10-12 09:56:36,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:36,903 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2020-10-12 09:56:36,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 09:56:36,904 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 52 [2020-10-12 09:56:36,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:36,905 INFO L225 Difference]: With dead ends: 69 [2020-10-12 09:56:36,905 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 09:56:36,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=613, Invalid=1109, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 09:56:36,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 09:56:36,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-12 09:56:36,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 09:56:36,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-10-12 09:56:36,912 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2020-10-12 09:56:36,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:36,912 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-10-12 09:56:36,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 09:56:36,913 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-10-12 09:56:36,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 09:56:36,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:36,913 INFO L422 BasicCegarLoop]: trace histogram [29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:36,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 09:56:36,914 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:36,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:36,914 INFO L82 PathProgramCache]: Analyzing trace with hash 853885724, now seen corresponding path program 29 times [2020-10-12 09:56:36,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:36,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147021442] [2020-10-12 09:56:36,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:36,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:36,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:37,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:37,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:38,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:38,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 09:56:38,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:38,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1718 [2020-10-12 09:56:38,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:38,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 09:56:38,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:56:38,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 09:56:38,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:42,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:42,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:42,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:42,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:42,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:42,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:56:42,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:42,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:42,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:42,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:42,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:42,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-12 09:56:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:42,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:42,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:42,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:42,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:42,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:56:42,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:42,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:56:42,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:56:42,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:42,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:42,169 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 4 proven. 436 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:56:42,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147021442] [2020-10-12 09:56:42,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:42,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 09:56:42,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374907730] [2020-10-12 09:56:42,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 09:56:42,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:42,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 09:56:42,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=869, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:56:42,171 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 38 states. [2020-10-12 09:56:42,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:42,751 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2020-10-12 09:56:42,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 09:56:42,752 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 53 [2020-10-12 09:56:42,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:42,753 INFO L225 Difference]: With dead ends: 70 [2020-10-12 09:56:42,753 INFO L226 Difference]: Without dead ends: 57 [2020-10-12 09:56:42,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=648, Invalid=1158, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 09:56:42,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-12 09:56:42,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-12 09:56:42,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 09:56:42,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-10-12 09:56:42,760 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 53 [2020-10-12 09:56:42,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:42,761 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-10-12 09:56:42,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 09:56:42,761 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-10-12 09:56:42,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 09:56:42,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:42,761 INFO L422 BasicCegarLoop]: trace histogram [30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:42,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 09:56:42,762 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:42,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:42,762 INFO L82 PathProgramCache]: Analyzing trace with hash 988260575, now seen corresponding path program 30 times [2020-10-12 09:56:42,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:42,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468346841] [2020-10-12 09:56:42,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:42,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:42,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:42,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:43,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:44,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:44,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 09:56:44,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:44,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1677 [2020-10-12 09:56:44,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:44,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 09:56:44,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:56:44,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 09:56:44,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:48,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:48,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:48,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:48,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:48,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:48,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:48,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:48,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:48,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:48,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:48,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:48,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 09:56:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:48,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:48,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:48,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:48,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:48,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:56:48,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:48,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:56:48,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:56:48,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:48,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 4 proven. 466 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:56:48,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468346841] [2020-10-12 09:56:48,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:48,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 09:56:48,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200882218] [2020-10-12 09:56:48,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 09:56:48,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:48,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 09:56:48,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 09:56:48,250 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 39 states. [2020-10-12 09:56:48,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:48,704 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2020-10-12 09:56:48,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 09:56:48,705 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 54 [2020-10-12 09:56:48,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:48,705 INFO L225 Difference]: With dead ends: 71 [2020-10-12 09:56:48,706 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 09:56:48,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=684, Invalid=1208, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 09:56:48,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 09:56:48,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-12 09:56:48,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 09:56:48,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-12 09:56:48,713 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 54 [2020-10-12 09:56:48,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:48,713 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-12 09:56:48,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 09:56:48,713 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-12 09:56:48,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 09:56:48,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:48,714 INFO L422 BasicCegarLoop]: trace histogram [31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:48,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 09:56:48,715 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:48,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:48,715 INFO L82 PathProgramCache]: Analyzing trace with hash 858913660, now seen corresponding path program 31 times [2020-10-12 09:56:48,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:48,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460082058] [2020-10-12 09:56:48,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:48,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:48,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:48,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:48,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:49,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:50,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:50,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 09:56:50,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:50,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1693 [2020-10-12 09:56:50,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:50,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 09:56:50,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:56:50,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 09:56:50,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:53,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:53,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:53,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:53,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:53,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:53,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:56:53,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:53,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:53,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:53,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:53,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:53,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-12 09:56:53,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:53,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:53,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:53,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:53,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:53,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:56:53,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:53,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:56:53,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:56:53,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:53,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 4 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:56:53,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460082058] [2020-10-12 09:56:53,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:53,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 09:56:53,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950322974] [2020-10-12 09:56:53,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 09:56:53,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:53,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 09:56:53,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=604, Invalid=956, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 09:56:53,569 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 40 states. [2020-10-12 09:56:54,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:54,165 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2020-10-12 09:56:54,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 09:56:54,166 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 55 [2020-10-12 09:56:54,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:54,166 INFO L225 Difference]: With dead ends: 72 [2020-10-12 09:56:54,166 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 09:56:54,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=721, Invalid=1259, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 09:56:54,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 09:56:54,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-12 09:56:54,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 09:56:54,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-12 09:56:54,174 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2020-10-12 09:56:54,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:54,175 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-12 09:56:54,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 09:56:54,175 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-12 09:56:54,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 09:56:54,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:54,176 INFO L422 BasicCegarLoop]: trace histogram [32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:54,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 09:56:54,176 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:54,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:54,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1144126591, now seen corresponding path program 32 times [2020-10-12 09:56:54,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:54,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933590042] [2020-10-12 09:56:54,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:54,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:54,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:54,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:54,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:55,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:55,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:55,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 09:56:55,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:56:55,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1733 [2020-10-12 09:56:55,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:55,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 09:56:55,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:56:55,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 09:56:55,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:59,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:56:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:59,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:59,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:59,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:56:59,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:59,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:59,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:59,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:56:59,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:56:59,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:56:59,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:59,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-12 09:56:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:59,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:59,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:56:59,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:56:59,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:56:59,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:56:59,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:56:59,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:56:59,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:56:59,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:56:59,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:56:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 4 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:56:59,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933590042] [2020-10-12 09:56:59,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:56:59,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 09:56:59,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168028621] [2020-10-12 09:56:59,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 09:56:59,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:56:59,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 09:56:59,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=1001, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 09:56:59,256 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 41 states. [2020-10-12 09:56:59,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:56:59,823 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2020-10-12 09:56:59,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 09:56:59,824 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 56 [2020-10-12 09:56:59,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:56:59,825 INFO L225 Difference]: With dead ends: 73 [2020-10-12 09:56:59,825 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 09:56:59,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=759, Invalid=1311, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 09:56:59,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 09:56:59,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-12 09:56:59,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-12 09:56:59,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-12 09:56:59,833 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 56 [2020-10-12 09:56:59,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:56:59,833 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-12 09:56:59,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 09:56:59,833 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-12 09:56:59,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 09:56:59,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:56:59,834 INFO L422 BasicCegarLoop]: trace histogram [33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:56:59,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 09:56:59,834 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:56:59,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:56:59,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1395792860, now seen corresponding path program 33 times [2020-10-12 09:56:59,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:56:59,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874963000] [2020-10-12 09:56:59,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:56:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:56:59,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:56:59,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:00,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:01,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:02,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:02,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 09:57:02,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:57:02,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2222 [2020-10-12 09:57:02,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:02,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 09:57:02,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:57:02,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 09:57:02,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:04,866 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 20 [2020-10-12 09:57:05,067 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 20 [2020-10-12 09:57:05,464 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 20 [2020-10-12 09:57:05,664 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 20 [2020-10-12 09:57:05,872 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 20 [2020-10-12 09:57:06,102 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 20 [2020-10-12 09:57:06,320 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 20 [2020-10-12 09:57:06,546 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 20 [2020-10-12 09:57:06,774 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 20 [2020-10-12 09:57:06,996 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 15 [2020-10-12 09:57:07,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:07,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:07,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:07,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:07,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:07,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:57:07,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:07,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:07,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:07,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:07,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:07,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-10-12 09:57:07,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:07,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:07,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:07,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:07,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:07,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:07,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:07,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:57:07,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:57:07,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:57:07,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 4 proven. 562 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:57:07,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874963000] [2020-10-12 09:57:07,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:07,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 09:57:07,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55856811] [2020-10-12 09:57:07,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 09:57:07,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:07,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 09:57:07,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=1047, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 09:57:07,307 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 42 states. [2020-10-12 09:57:07,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:07,991 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2020-10-12 09:57:07,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 09:57:07,992 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 57 [2020-10-12 09:57:07,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:07,993 INFO L225 Difference]: With dead ends: 74 [2020-10-12 09:57:07,993 INFO L226 Difference]: Without dead ends: 61 [2020-10-12 09:57:07,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=798, Invalid=1364, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 09:57:07,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-12 09:57:07,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-12 09:57:07,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 09:57:07,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2020-10-12 09:57:07,999 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 57 [2020-10-12 09:57:07,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:07,999 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2020-10-12 09:57:07,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 09:57:07,999 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2020-10-12 09:57:08,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 09:57:08,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:08,000 INFO L422 BasicCegarLoop]: trace histogram [34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:08,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 09:57:08,000 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:08,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:08,000 INFO L82 PathProgramCache]: Analyzing trace with hash 607512607, now seen corresponding path program 34 times [2020-10-12 09:57:08,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:08,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136532443] [2020-10-12 09:57:08,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:08,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:08,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:08,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:10,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:11,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:11,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 09:57:11,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:57:11,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3180 [2020-10-12 09:57:11,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:11,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 09:57:11,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:57:11,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 09:57:11,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:14,186 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 20 [2020-10-12 09:57:14,605 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 20 [2020-10-12 09:57:14,844 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 20 [2020-10-12 09:57:15,071 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 20 [2020-10-12 09:57:15,311 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 20 [2020-10-12 09:57:15,559 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 20 [2020-10-12 09:57:15,770 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 20 [2020-10-12 09:57:16,001 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 15 [2020-10-12 09:57:16,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:16,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:16,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:16,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:16,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:16,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:57:16,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:16,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:16,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:16,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:16,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:16,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-12 09:57:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:16,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:16,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:16,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:16,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:16,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:16,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:16,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:57:16,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:57:16,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:57:16,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 4 proven. 596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:57:16,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136532443] [2020-10-12 09:57:16,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:16,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 09:57:16,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081419615] [2020-10-12 09:57:16,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 09:57:16,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:16,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 09:57:16,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=712, Invalid=1094, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 09:57:16,286 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand 43 states. [2020-10-12 09:57:16,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:16,699 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2020-10-12 09:57:16,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 09:57:16,700 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 58 [2020-10-12 09:57:16,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:16,701 INFO L225 Difference]: With dead ends: 75 [2020-10-12 09:57:16,701 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 09:57:16,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=838, Invalid=1418, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 09:57:16,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 09:57:16,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-10-12 09:57:16,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 09:57:16,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-12 09:57:16,708 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 58 [2020-10-12 09:57:16,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:16,708 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-12 09:57:16,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 09:57:16,709 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-12 09:57:16,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 09:57:16,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:16,709 INFO L422 BasicCegarLoop]: trace histogram [35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:16,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 09:57:16,710 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:16,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:16,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1940628540, now seen corresponding path program 35 times [2020-10-12 09:57:16,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:16,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012007292] [2020-10-12 09:57:16,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:16,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:16,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:16,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:17,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:18,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:19,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:19,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 09:57:19,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:57:19,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2469 [2020-10-12 09:57:19,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:19,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 09:57:19,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:57:19,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 09:57:19,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:22,345 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 20 [2020-10-12 09:57:22,549 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 20 [2020-10-12 09:57:22,771 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 20 [2020-10-12 09:57:23,010 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 20 [2020-10-12 09:57:23,236 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 20 [2020-10-12 09:57:23,461 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 20 [2020-10-12 09:57:23,716 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 20 [2020-10-12 09:57:23,970 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 20 [2020-10-12 09:57:24,185 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 20 [2020-10-12 09:57:24,435 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 15 [2020-10-12 09:57:24,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:24,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:24,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:24,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:24,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:24,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:24,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:24,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:24,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:24,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:24,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:24,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:24,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-12 09:57:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:24,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:24,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:24,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:24,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:24,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:57:24,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:24,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:57:24,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:57:24,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:57:24,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 635 backedges. 4 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:57:24,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012007292] [2020-10-12 09:57:24,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:24,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 09:57:24,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250337041] [2020-10-12 09:57:24,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 09:57:24,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:24,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 09:57:24,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=750, Invalid=1142, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 09:57:24,773 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 44 states. [2020-10-12 09:57:25,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:25,514 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2020-10-12 09:57:25,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 09:57:25,515 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 59 [2020-10-12 09:57:25,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:25,516 INFO L225 Difference]: With dead ends: 76 [2020-10-12 09:57:25,516 INFO L226 Difference]: Without dead ends: 63 [2020-10-12 09:57:25,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=879, Invalid=1473, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 09:57:25,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-12 09:57:25,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-12 09:57:25,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 09:57:25,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-12 09:57:25,524 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 59 [2020-10-12 09:57:25,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:25,525 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-12 09:57:25,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 09:57:25,525 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-12 09:57:25,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 09:57:25,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:25,526 INFO L422 BasicCegarLoop]: trace histogram [36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:25,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 09:57:25,526 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:25,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:25,526 INFO L82 PathProgramCache]: Analyzing trace with hash 317549503, now seen corresponding path program 36 times [2020-10-12 09:57:25,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:25,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989461851] [2020-10-12 09:57:25,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:25,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:25,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:25,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:27,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:28,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:28,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 09:57:28,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:57:28,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3090 [2020-10-12 09:57:28,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:28,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 09:57:28,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:57:28,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 09:57:28,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:31,586 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 16 [2020-10-12 09:57:31,791 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 16 [2020-10-12 09:57:31,989 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 16 [2020-10-12 09:57:32,199 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 16 [2020-10-12 09:57:32,414 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 16 [2020-10-12 09:57:32,642 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 16 [2020-10-12 09:57:32,871 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 11 [2020-10-12 09:57:33,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:33,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:33,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:33,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:33,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:33,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:33,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:33,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:33,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:33,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:33,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:33,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:33,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 09:57:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:33,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:33,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:33,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:33,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:33,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:33,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:33,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:57:33,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:57:33,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:57:33,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 4 proven. 667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:57:33,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1989461851] [2020-10-12 09:57:33,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:33,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 09:57:33,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849503961] [2020-10-12 09:57:33,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 09:57:33,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:33,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 09:57:33,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=789, Invalid=1191, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 09:57:33,181 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 45 states. [2020-10-12 09:57:33,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:33,825 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-10-12 09:57:33,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 09:57:33,826 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 60 [2020-10-12 09:57:33,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:33,827 INFO L225 Difference]: With dead ends: 77 [2020-10-12 09:57:33,827 INFO L226 Difference]: Without dead ends: 64 [2020-10-12 09:57:33,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=921, Invalid=1529, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 09:57:33,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-12 09:57:33,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-12 09:57:33,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 09:57:33,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2020-10-12 09:57:33,834 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 60 [2020-10-12 09:57:33,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:33,835 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2020-10-12 09:57:33,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 09:57:33,835 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2020-10-12 09:57:33,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 09:57:33,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:33,836 INFO L422 BasicCegarLoop]: trace histogram [37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:33,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 09:57:33,836 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:33,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:33,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1541706908, now seen corresponding path program 37 times [2020-10-12 09:57:33,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:33,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455285023] [2020-10-12 09:57:33,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:33,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:33,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:33,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:34,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:34,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:36,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:36,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 09:57:36,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:57:36,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2657 [2020-10-12 09:57:36,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:36,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 09:57:36,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:57:36,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 09:57:36,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:39,756 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 16 [2020-10-12 09:57:39,959 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 16 [2020-10-12 09:57:40,173 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 16 [2020-10-12 09:57:40,388 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 16 [2020-10-12 09:57:40,616 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 16 [2020-10-12 09:57:40,860 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 16 [2020-10-12 09:57:41,105 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 11 [2020-10-12 09:57:41,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:41,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:41,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:41,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:41,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:41,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:41,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:41,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:41,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:41,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:41,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:41,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-12 09:57:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:41,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:41,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:41,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:41,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:41,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:41,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:41,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:57:41,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:57:41,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:57:41,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 708 backedges. 4 proven. 704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:57:41,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455285023] [2020-10-12 09:57:41,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:41,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 09:57:41,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091469469] [2020-10-12 09:57:41,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 09:57:41,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:41,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 09:57:41,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=829, Invalid=1241, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 09:57:41,405 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 46 states. [2020-10-12 09:57:41,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:41,969 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-10-12 09:57:41,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 09:57:41,970 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 61 [2020-10-12 09:57:41,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:41,970 INFO L225 Difference]: With dead ends: 78 [2020-10-12 09:57:41,971 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 09:57:41,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=964, Invalid=1586, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 09:57:41,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 09:57:41,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-12 09:57:41,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 09:57:41,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-12 09:57:41,977 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 61 [2020-10-12 09:57:41,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:41,977 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-12 09:57:41,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 09:57:41,978 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-12 09:57:41,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 09:57:41,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:41,978 INFO L422 BasicCegarLoop]: trace histogram [38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:41,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 09:57:41,979 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:41,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:41,979 INFO L82 PathProgramCache]: Analyzing trace with hash 835880799, now seen corresponding path program 38 times [2020-10-12 09:57:41,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:41,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843953495] [2020-10-12 09:57:41,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:41,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:42,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:42,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:43,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:45,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:45,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 09:57:45,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:57:45,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3064 [2020-10-12 09:57:45,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:45,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-12 09:57:45,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:57:45,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 09:57:45,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:48,316 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 16 [2020-10-12 09:57:48,730 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 16 [2020-10-12 09:57:48,947 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 16 [2020-10-12 09:57:49,172 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 16 [2020-10-12 09:57:49,410 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 16 [2020-10-12 09:57:49,659 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 16 [2020-10-12 09:57:49,912 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 11 [2020-10-12 09:57:50,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:50,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:50,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:50,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:50,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:50,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:57:50,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:50,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:50,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:50,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:50,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:50,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-12 09:57:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:50,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:50,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:50,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:50,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:50,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:50,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:50,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:57:50,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:57:50,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:57:50,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 4 proven. 742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:57:50,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843953495] [2020-10-12 09:57:50,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:50,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-12 09:57:50,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103920064] [2020-10-12 09:57:50,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-12 09:57:50,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:50,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-12 09:57:50,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=870, Invalid=1292, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 09:57:50,230 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 47 states. [2020-10-12 09:57:50,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:57:50,759 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2020-10-12 09:57:50,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 09:57:50,760 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 62 [2020-10-12 09:57:50,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:57:50,761 INFO L225 Difference]: With dead ends: 79 [2020-10-12 09:57:50,762 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 09:57:50,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1008, Invalid=1644, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 09:57:50,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 09:57:50,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-12 09:57:50,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 09:57:50,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-12 09:57:50,768 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2020-10-12 09:57:50,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:57:50,768 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-12 09:57:50,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-12 09:57:50,768 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-12 09:57:50,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 09:57:50,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:57:50,769 INFO L422 BasicCegarLoop]: trace histogram [39, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:57:50,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 09:57:50,769 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:57:50,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:57:50,770 INFO L82 PathProgramCache]: Analyzing trace with hash 430107900, now seen corresponding path program 39 times [2020-10-12 09:57:50,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:57:50,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356559270] [2020-10-12 09:57:50,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:57:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:50,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:50,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:51,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:52,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:54,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:54,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 09:57:54,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:57:54,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3352 [2020-10-12 09:57:54,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:54,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 09:57:54,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:57:54,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 09:57:54,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:57,465 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 16 [2020-10-12 09:57:57,691 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 16 [2020-10-12 09:57:57,908 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 16 [2020-10-12 09:57:58,129 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 16 [2020-10-12 09:57:58,381 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 16 [2020-10-12 09:57:58,627 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 16 [2020-10-12 09:57:58,879 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 16 [2020-10-12 09:57:59,133 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 16 [2020-10-12 09:57:59,407 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 11 [2020-10-12 09:57:59,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:57:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:59,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:59,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:59,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:57:59,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:59,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:59,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:59,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:57:59,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:57:59,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:57:59,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:59,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-12 09:57:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:57:59,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:57:59,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:57:59,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:57:59,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:57:59,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:57:59,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:57:59,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:57:59,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:57:59,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:57:59,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:57:59,724 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 4 proven. 781 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:57:59,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356559270] [2020-10-12 09:57:59,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:57:59,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 09:57:59,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603808609] [2020-10-12 09:57:59,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 09:57:59,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:57:59,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 09:57:59,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=912, Invalid=1344, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 09:57:59,726 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 48 states. [2020-10-12 09:58:00,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:00,250 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2020-10-12 09:58:00,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 09:58:00,251 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 63 [2020-10-12 09:58:00,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:00,252 INFO L225 Difference]: With dead ends: 80 [2020-10-12 09:58:00,252 INFO L226 Difference]: Without dead ends: 67 [2020-10-12 09:58:00,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 09:58:00,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-12 09:58:00,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-12 09:58:00,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 09:58:00,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-12 09:58:00,263 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 63 [2020-10-12 09:58:00,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:00,263 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-12 09:58:00,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 09:58:00,264 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-12 09:58:00,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 09:58:00,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:00,267 INFO L422 BasicCegarLoop]: trace histogram [40, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:00,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 09:58:00,267 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:00,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:00,268 INFO L82 PathProgramCache]: Analyzing trace with hash 736049919, now seen corresponding path program 40 times [2020-10-12 09:58:00,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:00,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589556919] [2020-10-12 09:58:00,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:00,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:00,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:00,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:00,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:01,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:03,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:03,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 09:58:03,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:58:03,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3349 [2020-10-12 09:58:03,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:03,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 09:58:03,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:58:03,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 09:58:03,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:06,444 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 20 [2020-10-12 09:58:06,850 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 20 [2020-10-12 09:58:07,069 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 20 [2020-10-12 09:58:07,292 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 20 [2020-10-12 09:58:07,515 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 20 [2020-10-12 09:58:07,760 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 20 [2020-10-12 09:58:08,004 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 20 [2020-10-12 09:58:08,259 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 20 [2020-10-12 09:58:08,509 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 20 [2020-10-12 09:58:08,792 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 20 [2020-10-12 09:58:09,079 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 20 [2020-10-12 09:58:09,367 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 20 [2020-10-12 09:58:09,669 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 20 [2020-10-12 09:58:09,987 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 20 [2020-10-12 09:58:10,256 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 20 [2020-10-12 09:58:10,553 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 15 [2020-10-12 09:58:10,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:10,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:10,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:10,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:10,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:10,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:10,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 09:58:10,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:10,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:10,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:10,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:10,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:10,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-12 09:58:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:10,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:10,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:10,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:10,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:10,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:10,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:10,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:58:10,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:58:10,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:58:10,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 4 proven. 821 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:58:10,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589556919] [2020-10-12 09:58:10,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:10,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 09:58:10,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608506405] [2020-10-12 09:58:10,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 09:58:10,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:10,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 09:58:10,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=955, Invalid=1397, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 09:58:10,907 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 49 states. [2020-10-12 09:58:11,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:11,525 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2020-10-12 09:58:11,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-12 09:58:11,527 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 64 [2020-10-12 09:58:11,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:11,528 INFO L225 Difference]: With dead ends: 81 [2020-10-12 09:58:11,528 INFO L226 Difference]: Without dead ends: 68 [2020-10-12 09:58:11,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1099, Invalid=1763, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 09:58:11,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-12 09:58:11,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-12 09:58:11,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 09:58:11,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2020-10-12 09:58:11,534 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 64 [2020-10-12 09:58:11,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:11,535 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2020-10-12 09:58:11,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 09:58:11,535 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2020-10-12 09:58:11,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 09:58:11,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:11,536 INFO L422 BasicCegarLoop]: trace histogram [41, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:11,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 09:58:11,536 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:11,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:11,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1630317916, now seen corresponding path program 41 times [2020-10-12 09:58:11,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:11,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359750454] [2020-10-12 09:58:11,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:11,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:11,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:12,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:13,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:15,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:15,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 09:58:15,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:58:15,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4089 [2020-10-12 09:58:15,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:15,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-12 09:58:15,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:58:15,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 09:58:15,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:18,928 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 20 [2020-10-12 09:58:19,167 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 20 [2020-10-12 09:58:19,403 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 20 [2020-10-12 09:58:19,652 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 20 [2020-10-12 09:58:19,911 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 20 [2020-10-12 09:58:20,184 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 20 [2020-10-12 09:58:20,453 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 20 [2020-10-12 09:58:20,727 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 20 [2020-10-12 09:58:21,011 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 20 [2020-10-12 09:58:21,340 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 20 [2020-10-12 09:58:21,659 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 20 [2020-10-12 09:58:22,001 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 20 [2020-10-12 09:58:22,339 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 20 [2020-10-12 09:58:22,686 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 20 [2020-10-12 09:58:23,044 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 20 [2020-10-12 09:58:23,404 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 20 [2020-10-12 09:58:23,687 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 20 [2020-10-12 09:58:24,003 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 15 [2020-10-12 09:58:24,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:24,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:24,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:24,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:24,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:24,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:24,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:24,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:24,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:24,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:24,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:24,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-12 09:58:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:24,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:24,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:24,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:24,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:24,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:24,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:24,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:58:24,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:58:24,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:58:24,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 4 proven. 862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:58:24,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359750454] [2020-10-12 09:58:24,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:24,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-12 09:58:24,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667005862] [2020-10-12 09:58:24,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-12 09:58:24,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:24,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-12 09:58:24,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=999, Invalid=1451, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 09:58:24,403 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 50 states. [2020-10-12 09:58:25,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:25,177 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2020-10-12 09:58:25,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-12 09:58:25,178 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 65 [2020-10-12 09:58:25,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:25,180 INFO L225 Difference]: With dead ends: 82 [2020-10-12 09:58:25,180 INFO L226 Difference]: Without dead ends: 69 [2020-10-12 09:58:25,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1146, Invalid=1824, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 09:58:25,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-12 09:58:25,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-12 09:58:25,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 09:58:25,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-12 09:58:25,188 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 65 [2020-10-12 09:58:25,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:25,188 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-12 09:58:25,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-12 09:58:25,188 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-12 09:58:25,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 09:58:25,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:25,189 INFO L422 BasicCegarLoop]: trace histogram [42, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:25,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 09:58:25,190 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:25,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:25,190 INFO L82 PathProgramCache]: Analyzing trace with hash -712145249, now seen corresponding path program 42 times [2020-10-12 09:58:25,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:25,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559028106] [2020-10-12 09:58:25,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:25,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:25,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:25,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:26,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:28,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:28,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 09:58:28,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:58:28,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2888 [2020-10-12 09:58:28,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:28,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-12 09:58:28,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:58:28,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 09:58:28,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:31,289 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 16 [2020-10-12 09:58:31,497 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 16 [2020-10-12 09:58:31,717 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 16 [2020-10-12 09:58:31,939 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 16 [2020-10-12 09:58:32,173 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 16 [2020-10-12 09:58:32,412 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 16 [2020-10-12 09:58:32,678 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 16 [2020-10-12 09:58:32,934 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 16 [2020-10-12 09:58:33,206 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 16 [2020-10-12 09:58:33,480 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 16 [2020-10-12 09:58:33,746 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 16 [2020-10-12 09:58:34,028 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 16 [2020-10-12 09:58:34,345 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 16 [2020-10-12 09:58:34,660 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 10 [2020-10-12 09:58:34,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:34,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:34,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:34,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:34,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:34,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:34,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:34,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:34,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:34,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:34,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:34,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 09:58:34,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:34,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:34,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:34,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:34,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:34,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:58:34,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:34,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:58:34,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:58:34,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:58:34,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:35,070 INFO L134 CoverageAnalysis]: Checked inductivity of 908 backedges. 4 proven. 904 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:58:35,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559028106] [2020-10-12 09:58:35,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:35,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-12 09:58:35,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146601963] [2020-10-12 09:58:35,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-12 09:58:35,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:35,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-12 09:58:35,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1044, Invalid=1506, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 09:58:35,072 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 51 states. [2020-10-12 09:58:36,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:36,025 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2020-10-12 09:58:36,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-12 09:58:36,027 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 66 [2020-10-12 09:58:36,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:36,029 INFO L225 Difference]: With dead ends: 83 [2020-10-12 09:58:36,029 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 09:58:36,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1194, Invalid=1886, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 09:58:36,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 09:58:36,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-12 09:58:36,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 09:58:36,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-12 09:58:36,037 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 66 [2020-10-12 09:58:36,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:36,037 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-12 09:58:36,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-12 09:58:36,038 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-12 09:58:36,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 09:58:36,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:36,038 INFO L422 BasicCegarLoop]: trace histogram [43, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:36,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 09:58:36,039 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:36,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:36,039 INFO L82 PathProgramCache]: Analyzing trace with hash -314059332, now seen corresponding path program 43 times [2020-10-12 09:58:36,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:36,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303251860] [2020-10-12 09:58:36,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:36,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:36,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:37,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:38,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:40,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:40,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 09:58:40,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:58:40,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4136 [2020-10-12 09:58:40,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:40,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-12 09:58:40,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:58:40,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 09:58:40,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:43,301 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 16 [2020-10-12 09:58:43,511 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 16 [2020-10-12 09:58:43,732 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 16 [2020-10-12 09:58:43,968 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 16 [2020-10-12 09:58:44,202 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 16 [2020-10-12 09:58:44,450 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 16 [2020-10-12 09:58:44,700 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 16 [2020-10-12 09:58:44,965 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 16 [2020-10-12 09:58:45,239 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 16 [2020-10-12 09:58:45,523 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 16 [2020-10-12 09:58:45,820 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 16 [2020-10-12 09:58:46,121 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 16 [2020-10-12 09:58:46,427 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 16 [2020-10-12 09:58:46,751 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 16 [2020-10-12 09:58:47,078 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 15 [2020-10-12 09:58:47,399 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 11 [2020-10-12 09:58:47,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:58:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:47,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:47,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:47,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:58:47,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:47,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:58:47,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:47,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:58:47,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:58:47,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:58:47,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:47,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-12 09:58:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:47,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:47,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:47,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:58:47,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:58:47,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:58:47,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:47,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:58:47,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:58:47,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:58:47,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 4 proven. 947 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:58:47,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303251860] [2020-10-12 09:58:47,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:58:47,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-12 09:58:47,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131422665] [2020-10-12 09:58:47,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-12 09:58:47,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:58:47,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-12 09:58:47,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=1562, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 09:58:47,792 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 52 states. [2020-10-12 09:58:48,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:58:48,833 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2020-10-12 09:58:48,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-12 09:58:48,834 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 67 [2020-10-12 09:58:48,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:58:48,836 INFO L225 Difference]: With dead ends: 84 [2020-10-12 09:58:48,836 INFO L226 Difference]: Without dead ends: 71 [2020-10-12 09:58:48,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1243, Invalid=1949, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 09:58:48,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-12 09:58:48,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-12 09:58:48,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-12 09:58:48,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-12 09:58:48,845 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 67 [2020-10-12 09:58:48,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:58:48,845 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-12 09:58:48,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-12 09:58:48,845 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-12 09:58:48,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 09:58:48,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:58:48,846 INFO L422 BasicCegarLoop]: trace histogram [44, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:58:48,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 09:58:48,847 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:58:48,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:58:48,847 INFO L82 PathProgramCache]: Analyzing trace with hash -858297793, now seen corresponding path program 44 times [2020-10-12 09:58:48,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:58:48,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117072306] [2020-10-12 09:58:48,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:58:48,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:58:48,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:48,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:50,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:51,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:58:53,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:58:53,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 09:58:53,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 09:58:53,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 09:58:53,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:58:53,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-12 09:58:53,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:58:53,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 09:58:53,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:58:56,296 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 16 [2020-10-12 09:58:56,860 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 16 [2020-10-12 09:58:57,069 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 16 [2020-10-12 09:58:57,285 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 16 [2020-10-12 09:58:57,504 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 16 [2020-10-12 09:58:57,749 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 16 [2020-10-12 09:58:57,990 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 16 [2020-10-12 09:58:58,240 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 16 [2020-10-12 09:58:58,495 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 16 [2020-10-12 09:58:58,759 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 16 [2020-10-12 09:58:59,040 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 16 [2020-10-12 09:58:59,320 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 16 [2020-10-12 09:58:59,609 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 16 [2020-10-12 09:58:59,903 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 16 [2020-10-12 09:59:00,222 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 16 [2020-10-12 09:59:00,566 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 16 [2020-10-12 09:59:00,900 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 16 [2020-10-12 09:59:01,250 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 15 [2020-10-12 09:59:01,612 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 15 [2020-10-12 09:59:01,978 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 11 [2020-10-12 09:59:02,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:02,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:02,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:02,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:02,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:02,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:02,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:02,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:02,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:02,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:02,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:02,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-12 09:59:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:02,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:02,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:02,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 09:59:02,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:02,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:02,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:02,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:59:02,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 09:59:02,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:59:02,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 995 backedges. 4 proven. 991 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:59:02,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117072306] [2020-10-12 09:59:02,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:02,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-12 09:59:02,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211719527] [2020-10-12 09:59:02,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-12 09:59:02,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:02,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-12 09:59:02,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1137, Invalid=1619, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 09:59:02,400 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 53 states. [2020-10-12 09:59:03,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:03,193 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2020-10-12 09:59:03,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 09:59:03,194 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 68 [2020-10-12 09:59:03,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:03,195 INFO L225 Difference]: With dead ends: 85 [2020-10-12 09:59:03,195 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 09:59:03,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1293, Invalid=2013, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 09:59:03,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 09:59:03,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-12 09:59:03,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-12 09:59:03,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-12 09:59:03,203 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 68 [2020-10-12 09:59:03,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:03,203 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-12 09:59:03,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-12 09:59:03,204 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-12 09:59:03,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 09:59:03,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:03,204 INFO L422 BasicCegarLoop]: trace histogram [45, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:03,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 09:59:03,205 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:03,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:03,205 INFO L82 PathProgramCache]: Analyzing trace with hash -549820900, now seen corresponding path program 45 times [2020-10-12 09:59:03,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:03,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927626633] [2020-10-12 09:59:03,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:03,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:03,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:04,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:05,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking...